Viega 56013 User Guide

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Pocket Guide

Viega PureFlow® Systems

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Viega. Connected in quality.

Building on Tradition

Founded 120 years ago, Viega is a privately owned, international group of companies. In the United States, Canada, Mexico, and Latin America, Viega specializes in plumbing, heating, and pipe joining technologies. The values of Viega’s founder, Franz-Anselm Viegener, are just as present today as they were when he started the company in 1899. Courage, passion, and innovative spirit are still the basics of Viega’s foundation.

Heritage of quality, vision for the future

Viega’s heritage of superiority demands nothing but the best for our customers. Engineered to be e󶈷cient, Viega products perform at the highest possible level, providing con󶈵dence and peace of mind. Viega is the only manufacturer to o󶈴er press systems in multiple pipe joining materials. More than one million Viega press 󶈵ttings are installed every day around the world and, with a Supply Chain that can process orders in 48 hours or less, Viega is positioned to provide customers with the best, most versatile support in the industry.

WARNING!

Viega products are designed to be installed by licensed and trained plumbing and mechanical professionals who are familiar with Viega products and their installation. Installation by non-professionals may

void Viega LLC’s warranty.

This document is subject to updates. For the most current Viega technical literature please visit www.viega.us.

2020, Viega®, FostaPEX®, ManaBloc®, PureFlow®, ProPress®, and Smart Connect® are registered trademarks of Viega GmbH & Co. KG. Eco Brass® is a registered trademark of Mitsubishi Shindoh Co., LTD. Radel® R is a registered trademark of Solvay Advanced Polymers. Viega: Connected in quality® is a trademark of Viega Holding GmbH & Co. KG. RIDGID® is a registered trademark of RIDGID, Inc.

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Table of Contents

Introduction _____________________________________________________ 6

Viega PureFlow Systems ______________________________________ 6 Smart Connect

Codes, Standards, and Certi󶈵cations _____________________________ 7

Specifying PureFlow Systems __________________________________ 7 Codes _____________________________________________________ 7 Standards __________________________________________________ 7 Certi󶈵cations ________________________________________________ 7 Fire Resistant Construction ____________________________________ 8

PureFlow Press Fittings _________________________________________ 10

PureFlow Press _____________________________________________ 10

PureFlow Press Fitting Markings ______________________________10

PureFlow Crimp Fittings ________________________________________ 11

PureFlow Crimp ____________________________________________11

PureFlow Crimp Fitting Markings ______________________________ 11

PureFlow Tools _________________________________________________ 12

PureFlow Press Hand Tools___________________________________ 12 PureFlow Press Power Tools __________________________________ 12 PureFlow Crimp Hand Tools __________________________________ 13

Product Instructions ____________________________________________ 14

Viega PureFlow Press Hand Tool ______________________________ 14 Viega PureFlow Press Power Tool _____________________________15 Viega PureFlow Crimp Hand Tool ______________________________ 16

Tubing Overview _______________________________________________17

PureFlow PEX Tubing ________________________________________ 17

FostaPEX

PureFlow PEX Tubing with Corrugated Sleeving __________________ 19

Design Considerations __________________________________________ 20

General System Sizing and Calculations ________________________20

Technology ___________________________________ 6

PureFlow Press Zero Lead Bronze ________________________ 10 PureFlow Press Polymer ________________________________ 10

PureFlow Crimp Eco Brass Fittings _______________________ 11 PureFlow Crimp PolyAlloy Fittings ________________________ 11

Properties and Performance _____________________________ 17 PureFlow PEX Tubing Markings __________________________ 17

Tubing ___________________________________________ 18 Properties and Performance _____________________________ 18 FostaPEX Tubing Markings ______________________________ 18

Properties and Performance _____________________________ 19 PureFlow PEX Tubing Markings __________________________ 19

Viega PureFlow Press Friction Loss _______________________ 20 Viega PureFlow Crimp Friction Loss _______________________ 20 Viega PureFlow PEX Tubing Flow Velocity __________________ 21 Viega PureFlow Pressure Loss ___________________________ 22

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Table of Contents

ManaBloc Systems _____________________________________________23

Viega Manifolds _____________________________________________ 23

Viega Manifold Markings ________________________________23

ManaBloc Design and Sizing _________________________________23

Supply and Distribution Line Sizing _______________________ 24 Water Heater Placement ________________________________ 24 Distribution Line Sizing to Fixture _________________________24

ManaBloc Installation Overview _______________________________ 25

Carton Contents _______________________________________ 25 ManaBloc Location ____________________________________25

Multiple ManaBloc Installations ________________________________ 26 Locating a Remote ManaBloc _________________________________ 26 ManaBloc Supply Piping Options ______________________________ 27 Draining the ManaBloc Unit ___________________________________ 28

Draining the ManaBloc System___________________________ 28

Mounting the ManaBloc ______________________________________ 29

Mounting the ManaBloc Between Studs ___________________ 29 Mounting the ManaBloc – Without Mounting Straps _________ 31 Mounting the ManaBloc – Surface Mount __________________ 31

Mounting the MiniBloc _______________________________________ 32 Mounting PureFlow Press and PureFlow Crimp Polymer Manifolds _ _ 33

Installing PureFlow Systems ____________________________________34

Storage Recommendations ___________________________________ 34

Do’s _________________________________________________ 34 Don’ts _______________________________________________ 34

Handling Viega PureFlow PEX Tubing __________________________35

Uncoiling PureFlow PEX Tubing __________________________ 35 Bending PureFlow PEX Tubing ___________________________35

Removing PureFlow Connections______________________________ 36 Repairs ____________________________________________________ 36 Freezing ___________________________________________________ 37 Water Heaters ______________________________________________ 37 Heaters, Flues, Vents, and Recessed Lights _____________________ 38 Fastening the PureFlow System _______________________________39

Wood Frame Construction ______________________________ 39 Steel Construction _____________________________________ 39

Supporting PureFlow PEX Tubing ______________________________ 40 Installation Considerations ____________________________________ 41

PEX Risers____________________________________________ 41 PEX Support Trays _____________________________________42

Noise and Water Hammer ____________________________________ 43 Shower Valves______________________________________________44 Electrical Grounding _________________________________________ 44 Expanding Foams ___________________________________________ 44 Fire Stop Compounds _______________________________________ 45 Tubing Expansion ___________________________________________ 45

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Table of Contents

Calculating Expansion Loops and O󶈴sets _______________________ 46

Corner Expansion O󶈴set ________________________________46 Z-Type Expansion O󶈴set ________________________________ 46 U-Type Expansion O󶈴set ________________________________ 47 FostaPEX _____________________________________________ 47

Coiled Loop ___________________________________________ 47 Domestic Hot Water Circulating Systems _______________________ 49 Installing Viega PureFlow Fittings ______________________________ 50

Stub Out Options ______________________________________ 50 PureFlow PEX Tubing Installed in Slab __________________________ 51

Sleeving Requirements _________________________________ 51

Sealants ______________________________________________ 52

Heat Tape ____________________________________________52

Freeze Repair _________________________________________ 52

Condensation Control __________________________________ 52 Installing PEX Under a Slab ___________________________________ 52 Installing PEX Below Grade as Service Line _____________________ 53

Pressure Testing PureFlow Systems _____________________________ 54

System Disinfection ____________________________________________ 57

Limited Warranty _______________________________________________58

Trace Wire ____________________________________________53

General ___________________________________________________ 54 Air Testing _________________________________________________55

Preparing for Air Pressure Test ___________________________ 55

Pressurizing the System ________________________________55

Completing the Air Test _________________________________ 56 Leak Detection _____________________________________________ 56

General ___________________________________________________ 57 California Flushing Requirements ______________________________57

Viega PureFlow Water System ________________________________ 58

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Introduction

Viega PureFlow Systems

Viega PureFlow is a high-quality, 󶈶exible PEX system for hot and cold potable water distribution. It is the most complete potable water solution available on the North American market. With tubing, 󶈵ttings, and distribution manifolds, Viega provides everything you need for a total plumbing system that is not only easy to install but also helps reduce energy costs and water waste.

The Viega PureFlow plumbing system o󶈴ers maximum security thanks to press and fullcircle crimp 󶈵tting techniques. Viega provides the highest-quality PEX tubing with the best UV and chlorine ratings in the industry. All Viega PureFlow tubing, 󶈵ttings, and manifolds are NSF certi󶈵ed for use in potable water systems.

Viega PureFlow and its related 󶈵ttings are listed to the requirements of AWWA C904 and approved for use in water service applications. Viega o󶈴ers a variety of threaded, solder, and ProPress several types of piping materials.

The systems incorporate:

■ Viega PureFlow PEX tubing: red,

■ Black Viega PureFlow PEX tubing

■ Viega FostaPEX

■ A range of Zero Lead bronze, Eco Brass®,

■ Viega ManaBloc® distribution system for

■ A range of inline, manifold, and stop

■ Viega press tools and jaws for the

■ Viega crimp tools for the PureFlow

adapters to transition PEX to

white, blue, and black cross-linked polyethylene tubing designed with superior chlorine and UV resistance.

(¾" - 2"): UL 1821 listed for use in multipurpose one- and two-family 󶈵re sprinkler systems per NFPA 13D.

polyethylene with additional aluminum and polyethylene layers to provide rigidity and form stability, available in red or silver to di󶈴erentiate hot water lines.

or polymer 󶈵ttings for PureFlow Press and PureFlow Crimp 󶈵tting systems.

use with Viega PureFlow PEX tubing.

valves for Viega PureFlow 󶈵tting systems.

PureFlow Press 󶈵tting systems.

Crimp 󶈵tting systems.

tubing: cross-linked

Smart Connect® Technology

Locating unpressed connections is an important step in the pressure testing process. Viega PureFlow Press Polymer 󶈵tting systems incorporate Smart Connect technology, providing quick and easy identi󶈵cation of unpressed connections during a pressure test.

Smart Connect technology is an integral part of the design of the 󶈵tting, providing a path for liquids and/or gases from inside the system past the sealing element of an unpressed connection. When pressed according to our Product Instructions, the 󶈶uid path is altered, creating a leak-proof, reliable connection.

Unpressed connections are located by pressurizing the system with air or water. When testing, the proper pressure range is 40 to 100 psi.

Identify an unpressed

connection during

pressure testing when water flows out of the unpressed fitting joint.

Upon

identification, use the press tool

to press the fitting, making a secure, leakproof connection.

Viega PureFlow connections are

fast and reliable.

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Codes, Standards, and Certifications

Specifying PureFlow Systems

Viega o󶈴ers many tools to assist the specifying engineer, engineer, contractor, and installer to ensure Viega PureFlow systems are properly designed and installed. This can be done by referring to one of the resources listed below:

■ Engineering Speci󶈵cations are

available at www.viega.us.

■ Viega guide speci󶈵cations in Master

Spec format are available upon request at (800) 976-9819.

■ Contact your local Viega 󶈵eld sales

representative.

With a 25 year limited warranty and unmatched quality in the industry, Viega o󶈴ers a complete system solution for all your plumbing needs.

Viega PureFlow PEX tubing and Viega PureFlow Press polymer 󶈵ttings are manufactured in the United States and provide secure, reliable connections for residential and light commercial projects, ranging from potable water to snow melting applications.

Codes

The Viega PureFlow system is accepted by the following model codes for use in potable hot- and cold-water distribution systems:

■ Housing for Urban Development (HUD)

■ IAPMO: California Plumbing Code (CPC)

■ IAPMO: National Standard Plumbing

Code (NSPC)

■ IAPMO: Uniform Mechanical Code (UMC)

■ IAPMO: Uniform Plumbing Code (UPC)

■ ICC – International Code Council

■ ICC: International Mechanical Code (IMC)

■ ICC: International Plumbing Code (IPC)

■ ICC: International Residential Code (IRC)

■ National Building Code of Canada (NBCC)

■ National Plumbing Code of Canada (NPCC)

Check with your local Viega representative for code compliance in your area.

Standards

■ ASTM E814

■ ASTM E84

■ ASTM F1807/F2159

■ ASTM F876/F2023

■ ASTM F877

■ ASTM F3347

■ ASTM F3348

■ ASTM F3253

■ AWWA C904

■ ISO 9001

■ NFPA 13D

■ NSF/ANSI 14

■ NSF/ANSI 359

■ NSF/ANSI 372

■ NSF/ANSI 61

Certifications

■ CAN/ULC S101

■ CAN/ULC S102.2

■ CAN/ULC S115

■ CAN/ULC/ORD/ C199P

■ Certi󶈵cate of Listing

us pw-G

■ cNSF

■ CSA B137.5

■ IAPMO R&T

■ ICC – ES

■ ICC ES-PMG

■ NSF U.P. Code

■ NSF-pw certi󶈵cation mark

■ PEX 5306

■ TR 4 Listed Materials

■ UL/ANSI 1821

■ UL/ANSI 263

Note: Certi󶈵cations available at:

■ www.nsf.org

■ www.spec-direct.com (Intertek)

■ www.ul.com

■ www.canada.ul.com

™

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Codes, Standards, and Certifications

Fire Resistant Construction

U.S. listings Plenum rating

Viega PureFlow PEX tubing has been tested and listed to the ASTM E84 with the following ratings:

ASTM E84 Plenum Ratings / Listing

Manufacturer

Products

Listed

Viega ⅜" to 2" PEX 25 or less 50 or less

Note: Listings include fitting connections in line when covered by insulation.

Viega PureFlow PEX has the following listings for each respective construction type:

Construction Type Assembly Type Design No.

Wood Frame Construction

Noncombustible Concrete /

Steel Construction

U.S. Fire Resistant Construction

Flame

Spread

Smoke

Development

ANSI/UL 263 and ASTM E119

Floor / Ceiling M517

Walls VL/FWDP 60-01

Floor / Ceiling

Walls VL/FWDP 60-02

Limitations

½" minimum insulation

thickness, no spacing

limitations

VL/FWDP 120-01

VL/FWDP 120-02

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Codes, Standards, and Certifications

Canadian listings Plenum rating

Viega PureFlow PEX tubing has been tested and listed to the CAN/ULC S102.2 with the following ratings:

CAN/ULC S102.2 Ratings / Listing

Manufacturer

Products

Listed

Viega ⅜" to 2" PEX 25 or less 50 or less

Viega ⅜" to ½" PEX 25 or less 50 or less No spacing limitations

Note: Listings include fitting connections in line when covered by insulation.

Viega PureFlow PEX has the following listings for each respective construction type:

Construction Type Assembly Type Design No.

Wood Frame Construction

Noncombustible Concrete /

Steel Construction

Canadian Fire Resistant Construction

Flame

Spread

Smoke

Development

ANSI/UL 263 and ASTM E119

Floor / Ceiling M522

Walls VL/FWDP 60-01

Floor / Ceiling

Walls VL/FWDP 60-02

Limitations

½" minimum insulation

thickness, no spacing

limitations

VL/FWDP 120-01

VL/FWDP 120-02

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PureFlow Press Fittings

PureFlow Press

Viega PureFlow Press 󶈵ttings allow installers to make secure press connections in less than seven seconds. With Viega press technology, pressure testing can be completed immediately after connections are made.

Viega PureFlow Press 󶈵ttings are approved for potable water and hydronic heating applications. They are available in sizes ranging from ⅜" through 2" in both Zero Lead and high-grade polymer materials and include a factoryassembled, stainless steel sleeve with three viewing holes and a tool locator ring to ensure a proper press connection.

The following design criteria make Viega PureFlow Press 󶈵ttings ideal for use in potable water applications:

■ High corrosion resistance

■ Excellent strength properties

■ Resistant to stress corrosion

■ Superior wear properties

■ Compatible with all materials

PureFlow Press Zero Lead Bronze

Viega PureFlow Press Zero Lead bronze 󶈵ttings are manufactured from a highquality Zero Lead material speci󶈵cally designed for press technology meeting or exceeding all manufacturing requirements.

PureFlow Press Polymer

Viega PureFlow Press polymer 󶈵ttings are manufactured from Radel R the Viega Smart Connect technology.

and incorporate

PureFlow Press Fitting Markings

Each Viega PureFlow Press 󶈵tting is marked where space permits with the following information:

Manufacturer VIEGA

ASTM Standard

Temperature Rating

Certi󶈵cations

Note: All 󶈵ttings may not be listed with each organization shown.

Viega PureFlow Press 󶈵ttings.

Viega PureFlow Press polymer 󶈵ttings must be protected from UV exposure, which can damage them. In the event of incidental UV exposure during storage, installation, and handling, combined exposure of PureFlow Press 󶈵ttings shall not exceed 15 days.

Do not expose Viega products to any foreign substance that includes but is not limited to VOC (volatile organic chemical) compounds, paints, solvents, glues, cleaners, and disinfectants. Viega products that are exposed to these types of substances are at risk of having failures (leaks).

ASTM F877, F3253, F3347, F3348 180°F (potable), 200°F (hydronic heating) cNSF UPC ICC-ES PMG™ 1038 / 1015

WARNING!

Use only Viega stainless steel attached PureFlow Press sleeves and press tools with

us pw-G, CSA B137.5,

or UP Code, cULus®,

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PureFlow Crimp Fittings

PureFlow Crimp

Viega PureFlow Crimp 󶈵ttings are in metallic or polymer con󶈵gurations. The following design criteria make PureFlow Crimp 󶈵ttings ideal for use in potable water applications:

■ Excellent strength properties

■ Corrosion resistant

■ Fast installation

PureFlow Crimp Eco Brass Fittings

PureFlow Crimp Eco Brass 󶈵ttings are manufactured from a high-grade Zero Lead alloy.

PureFlow Crimp PolyAlloy Fittings

PureFlow Crimp PolyAlloy 󶈵ttings are manufactured from a performance-grade polymer (Acudel with excellent chlorine- and corrosionresistant properties.

and/or Radel-R®)

PureFlow Crimp Fitting Markings

Each PureFlow Crimp 󶈵tting is marked where space permits with the following information:

Manufacturer VIEGA

ASTM Standard

Temperature Rating 180°F

Certi󶈵cations

Note: All 󶈵ttings may not be listed with each organization shown.

ASTM F1807 (metallic), F2159 (polymer)

UPC

, or U.P. Code, NSF-pw, CSA B137.5, cNSF ICC-ES PMG

WARNING!

Use only ASTM F1807 copper crimp rings and full-circle crimp tools with PureFlow

Crimp 󶈵ttings.

WARNING!

NOT for use with FostaPEX tubing.

Viega PureFlow Crimp PolyAlloy 󶈵ttings must be protected from UV exposure, which can damage them. In the event of incidental UV exposure during storage, installation, and handling, combined exposure of PureFlow Crimp PolyAlloy 󶈵ttings shall not exceed 15 days.

™

1038

us pw-G,

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PureFlow Tools

PureFlow Press Hand Tools

The Viega PureFlow Press connection must always be carried out with the aid of a Viega PureFlow Press tool. The hand tool incorporates a forced compression mechanism to complete a secure connection each time. A ratchet inside the tool prevents the tool from being opened until the proper force has been applied to the press sleeve. A safety release screw allows the tool to be opened at any time, but any connection made without full tool compression must be repressed. The tool handles are color coded to match the PureFlow Press tool locator rings.

The reduced grip feature permits onehanded operation, making the Viega PureFlow Press system ideal for tight spaces and awkward locations. The compression of the tool also allows press connections to be made in temperatures as low as -4°F.

PureFlow Press Power Tools

The Viega PureFlow Press connection may also be carried out with a Viega power tool. These RIDGID designed to make the same consistent press as the Viega PureFlow Press hand tools. The compression of the tool also allows press connections to be made in temperatures as low as 23°F.

RP-241-B Kit

tools are

Compact Power Tool RP-240

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PureFlow Crimp Hand Tools

The Viega PureFlow Crimp connection must always be carried out with the aid of a Viega PureFlow Crimp tool. There are multiple con󶈵gurations of Viega PureFlow Crimp tools that are ideal for tight spaces and awkward locations. The compression of the tool also allows for crimp connections to be made in temperatures as low as -30°F.

PureFlow Tools

A caliper (GO/NO GO gauge) is available to check the calibration of the crimp tool. A crimp is good if the GO gauge 󶈵ts over the ring and the NO GO gauge does not.

At least one connection should be checked at the beginning and end of each day to ensure proper crimps have been made. Most crimp tools can be recalibrated (refer to “Viega PureFlow Crimp Hand Tool” on page 16).

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FostaPEX

Product Instructions

Pure

Flow

1/2”

Viega PureFlow Press Hand Tool

2 3

1" Tool only

Square o󶈴 tubing to proper length.

Uneven, jagged, or irregular cuts will produce unsatisfactory connections.

If using FostaPEX tubing, insert into prep tool, push and turn until no resistance is felt. If using Viega PureFlow PEX, continue to Step 3.

Insert PureFlow Press 󶈵tting with attached sleeve into tubing and engage fully.

Ensure full tubing insertion at view

holes in attached press sleeve. Full insertion means tubing must be completely visible in at least two view holes and partially visible in the one.

For the 1" tool, open the tool handles

fully (thumb grip is available to maintain open jaw). Then

close tool jaws to engage ratchet (ensure that thumb grip is returned fully forward before closing jaws).

Position the PureFlow press tool

perpendicular over the press sleeve, resting it against the tool locator ring. For 1" tool,

close tool jaws to engage ratchet (ensure that thumb grip is returned fully forward before closing jaws). Make sure the PureFlow press tool is properly aligned (see step 8 if it is not).

The tool locator ring must be in the factory-installed position while making a press

to ensure a consistent leakproof connection. It may be necessary to rotate the tool locator ring to avoid interference between the ring and tool.

Flow

Pure

1/2”

Close handles, using trigger to reduce grip span if desired.

If the PureFlow press tool is not

properly aligned with the locator ring, use the emergency release (using a screw driver to turn the emergency release) to open the press tool. Once released, align the PureFlow press tool properly and go back to step 6.

WARNING!

The connection is not leak-proof when the tool has been opened

by emergency release. The tool locator ring must be present to ensure a proper PureFlow Press connection.

Extend the PureFlow press tool handle

and continue ratcheting until automatic tool release occurs at the proper compression force.

CAUTION!

Do not press twice.

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Product Instructions

FostaPEX

Viega PureFlow Press Power Tool

Square o󶈴 tubing to proper length.

Uneven, jagged, or irregular cuts will produce unsatisfactory connections.

If using FostaPEX tubing, insert into prep tool, push and turn until no resistance is felt.

Insert PureFlow Press 󶈵tting with attached sleeve into tubing and engage fully.

Ensure full tubing insertion at view

holes in attached press sleeve. Full insertion means tubing must be completely visible in at least two view holes and partially visible in the one.

Insert the appropriate PureFlow press

jaw into the press tool and push in the holding pin until it locks.

Open jaw and position perpendicular

over press sleeve, resting it against the tool locator ring.

The tool locator ring must

be in the factory-installed

position while making a press

to ensure a consistent leakproof connection. It may be necessary to rotate the tool locator ring to avoid interference between the ring and tool.

Start the pressing process; hold the trigger until the jaw has automatically released.

When press connection is complete, open

and remove the jaw.

WARNING!

The tool locator ring must be

present to ensure a proper

PureFlow Press connection.

CAUTION!

Do not press twice.

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Product Instructions

Viega PureFlow Crimp Hand Tool

1 2

The tubing should be cut squarely

and evenly without burrs. Uneven, jagged, or irregular cuts will produce unsatisfactory connections.

Slide the crimp ring onto the tubing

and insert the 󶈵tting into the tube to the shoulder or tube stop.

Position the ring

end of the tubing.

The ring must be attached straight.

⅛

" to ¼" from the

Center the crimping tool jaws exactly over the ring. Keep the tool at 90° and close the handles completely.

CAUTION!

Do not crimp twice.

/8” to ¼”

When checking crimp

90°

connections with a caliper (GO/ NO GO gauge), push the gauge STRAIGHT DOWN over the crimped ring. NEVER slide the gauge in from the side. Do not attempt to gauge the crimp at the jaw overlap area. The overlap area is indicated by a slight removal of the blackening treatment. A crimp is acceptable if the GO gauge 󶈵ts the ring and the NO GO does not. A crimp is unacceptable if the GO gauge does not 󶈵t the ring or the NO GO gauge does 󶈵t. An incorrect crimp must be cut out of the tubing and replaced.

Crimp dimensions can be veri󶈵ed with the Go/No-Go gauge.

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PureFlow PEX Tubing

Viega PureFlow PEX (cross-linked polyethylene) is the ideal tubing choice for potable water systems. In addition, the smooth walls of Viega PureFlow PEX tubing are resistant to corrosion and scaling.

Properties and Performance

Linear Expansion Coe󶈷cient:

1.1 inch per 100 feet per 10°F

Temperature and Pressure Ratings:

180°F at 100 psi

73.4°F at 160 psi

UV Resistance:

Maximum exposure 6 months

Chlorine Resistance:

PEX 5306 – end-use condition of 100% at 140°F (approved for continuous domestic hot water circulation systems)

Bend Radius:

Viega PureFlow PEX can be easily bent by hand or with the use of Viegaapproved bend supports (see “Wood Frame Construction” on page 39) to a radius as small as 󶈵ve times tubing outer diameter.

Tubing Overview

PureFlow PEX Tubing Markings

Viega PureFlow PEX tubing is marked every 󶈵ve feet with the following representative information.

Length Marker 000 feet Company Viega Product Name Viega PureFlow PEX Nominal Tubing Size ½" Standard Dimension

Ratio Tube Size Material Designation Code Temperature & Pressure Rating NSF Listing (Potable) cNSF NSF Chlorine Listing CL5 ASTM Tubing Standards Certi󶈵cation Canadian Standard Assoc

Fittings System Compatibility

IAPMO Listing UPC

UL Listing Rating*

Plenum Rating**

Fire Resistance Ratings

ICC Listing ES-PMG AWWA Listing C904 HUD Listing MR 1276 Manufacturer’s Date Code Material Code X14.2 Country of Manufacture

* ¾" through 2" Black Viega PureFlow PEX only ** 2" and smaller tube sizes when wrapped with ½" - 1" thick E84 rated insulation, ½" and smaller with no insulation per ULC S102.2 listing. Tubing may include 󶈵tting connections when wrapped.

Print Line Markings

SDR 9 CTS (copper tube size) PEX 5306 100 psi @ 180F 160 psi @ 73F

F876, F877

CSA B137.5

PureFlow - ASTM F877, F1807, F2159, F3347, F3348

cULus 3SAV UL1821 130 psi @ 120F FS/SD 25/50 ASTM E84 CAN/ULC S102.2 CAN/ULC S101 ANSI/UL 263, UL 2846

1/1/2010

Made in the USA

us-pw

™

- 1038

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Tubing Overview

FostaPEX® Tubing

Viega FostaPEX tubing is the ideal companion for the Viega PureFlow plumbing system. This tubing can be easily bent by hand like the Viega PureFlow PEX tubing but holds its shape after bending (combining the bene󶈵ts of both rigid and 󶈶exible tubing). The result is fewer 󶈵ttings and bend supports and less labor.

A unique feature of FostaPEX is that the inner layer is fully dimensioned Black Viega PureFlow PEX tubing. The aluminum and outer PE layers surround the inner PEX tubing. This construction allows the inner layer alone to meet all temperature and pressure requirements of the system. Using the prep tool to remove the outer layers allows the use of the standard Viega PureFlow Press Zero Lead bronze and polymer 󶈵tting systems, which reduces tooling costs for the contractor and simpli󶈵es connections.

Properties and Performance

Linear Expansion Coe󶈷cient:

0.16 inch per 100 feet per 10°F

Temperature and Pressure Ratings:

200°F at 80 psi * 180°F at 100 psi

73.4°F at 160 psi

*For non-potable hydronic heating systems only

UV Resistance:

Maximum exposure 12 months. FostaPEX should not be installed where permanently exposed to sunlight.

Chlorine Resistance:

PEX 5306 – end-use condition of 100% at 140°F (approved for continuous domestic hot water circulation systems)

Bend Radius:

FostaPEX tubing can be bent to a radius of 3.5 times tubing outer diameter with the use of a tubing bender.

WARNING!

Not for use with PEX Crimp

󶈵ttings.

FostaPEX Tubing Markings

FostaPEX tubing is marked every 󶈵ve feet with the following representative information.

Length Marker 000 feet Company Viega Product Name FostaPEX Nominal Tubing Size ½" Standard Dimension

Ratio Tube Size Material Designation Code Temperature & Pressure Rating NSF Listing (Potable) cNSF NSF Chlorine Listing CL5 ASTM Tubing Standards Certi󶈵cation Canadian Standard Assoc Fittings System Compatibility IAPMO Listing UPC

Plenum Rating*

Fire Resistance Ratings ICC Listing

AWWA Listing C904 HUD Listing MR 1276 Manufacturer’s Date Code Material Code X18.1 Country of Manufacture

* 2" and smaller tube sizes when wrapped with ½" - 1" thick E84 rated insulation, ½" and smaller with no insulation per ULC S102.2 listing. Tubing may include 󶈵tting connections when wrapped.

Print Line Markings

SDR 9 CTS (copper tube size) PEX 5306 100 psi @ 180F 160 psi @ 73F

us-pw-rfh

F876, F877

CSA B137.5 PureFlow - ASTM F877, F3347, F3348

FS/SD 25/50 ASTM E84 CAN/ULC S102.2 CAN/ULC S101 ANSI/UL 263, UL 2846 ES-PMG™ - 1015,1038

1/1/2010

Made in the USA

PG-PF 724998 0320 PureFlow System

Page 19

Tubing Overview

PureFlow PEX Tubing with Corrugated Sleeving

Viega PureFlow PEX tubing is available with a 󶈶exible polypropylene corrugated sleeving that is pre-installed on Viega PureFlow PEX red and blue 300-foot coils in ½" and ¾" sizes. This sleeved PEX product is ideal for direct burial and/or cast in cement applications.

Properties and Performance

Linear Expansion Coe󶈷cient:

1.1 inch per 100 feet per 10°F

Temperature and Pressure Ratings:

180°F at 100 psi

73.4°F at 160 psi

UV Resistance:

Maximum exposure 6 months

Chlorine Resistance:

PEX 5306 – end-use condition of 100% at 140°F (approved for continuous domestic hot water circulation systems)

Bend Radius:

Viega PureFlow PEX can be easily bent by hand or with the use of Viegaapproved bend supports to a radius as small as 󶈵ve times tubing outer diameter.

PureFlow PEX Tubing Markings

Viega PureFlow PEX tubing is marked every 󶈵ve feet with the following representative information.

Length Marker 000 feet Company Viega Product Name Viega PureFlow PEX Nominal Tubing Size ½" Standard Dimension

Ratio Tube Size Material Designation Code Temperature & Pressure Rating NSF Listing (Potable) cNSF NSF Chlorine Listing CL5 ASTM Tubing Standards Certi󶈵cation Canadian Standard Assoc

Fittings System Compatibility

IAPMO Listing UPC

UL Listing Rating*

Plenum Rating**

Fire Resistance Ratings

ICC Listing ES-PMG AWWA Listing C904 HUD Listing MR 1276 Manufacturer’s Date Code Material Code X14.2 Country of Manufacture

Print Line Markings

SDR 9 CTS (copper tube size) PEX 5306 100 psi @ 180F 160 psi @ 73F

us-pw

F876, F877

CSA B137.5 PureFlow - ASTM F877, F1807, F2159, F3347, F3348

cULus 3SAV UL1821 130 psi @ 120F FS/SD 25/50 ASTM E84 CAN/ULC S102.2 CAN/ULC S101 ANSI/UL 263, UL 2846

™

- 1038

1/1/2010

Made in the USA

PG-PF 724998 0320 PureFlow System

Page 20

Design Considerations

General System Sizing and Calculations

Viega PureFlow systems should be designed following standard plumbing engineering practice. Follow local codes to determine minimum tubing size and required 󶈵xture pressures.

Pressure drop through 󶈵ttings can be estimated from the charts on the following pages. Values are expressed in equivalent length of tubing, so add the values for the relevant 󶈵ttings to the length of tubing in the run, and then determine the total pressure drop from the charts.

Viega PureFlow Press Friction Loss

Equivalent feet of SDR9 PEX tubing

To determine the pressure drop through runs of Viega PureFlow PEX and FostaPEX tubing, refer to the “Viega PureFlow Press Friction Loss” tables below. For a known 󶈶ow rate, tubing size, and tubing length, the pressure drop through the run can be easily determined.

PureFlow Press Zero Lead Bronze Fittings

Size Coupling Elbow

Tee Run

Tee

Branch

⅜" 2.9 9.2 2.9 9.4 ½" 2.0 9.4 2.2 10.4 ¾" 1.0 8.0 1.0 9.0

1" 1.0 10.0 2.0 10.0 1¼" 2.0 11.0 2.0 11.0 1½" 2.0 13.0 2.0 12.0

2" 1.0 19.0 2.0 18.0

Viega PureFlow Crimp Friction Loss

Equivalent feet of SDR9 PEX tubing

PureFlow Crimp Eco Brass Fittings

Size Coupling Elbow

⅜" 2.9 9.2 2.9 9.4 ½" 2.0 9.4 2.2 10.4 ¾" 0.6 9.4 1.9 8.9

1" 1.3 10.0 2.3 11.0

Tee Run

Tee

Branch

PureFlow Press Polymer Fittings

Size Coupling Elbow

Tee Run

Tee

Branch

⅜" 4.5 14.3 6.5 14.7 ½" 2.6 12.6 3.9 14.0 ¾" 2.5 18.9 3.6 19.1

1" 3.1 17.7 3.8 18.4 1¼" 4.0 18.6 6.4 18.7 1½" 5.2 29.4 7.9 28.3

2" 8.9 36.4 10.2 37.5

PureFlow Crimp PolyAlloy Fittings

Size Coupling Elbow

⅜" 10.9 ½" 7.1 ¾" 4.8

1" 4.5

PG-PF 724998 0320 PureFlow System

Tee

Run

Branch

22.3 N/A N/A

16.5 7.2 17.9

17.4 6.6 17.7

18.0 6.0 17.0

Page 21

Design Considerations

Viega PureFlow PEX Tubing Flow Velocity

Flow Rate

GPM

0.5 1.7 0.9

1.0 3.3 1.8 0.9 0.5

1.5 5.0 2.7 1.4 0.8 0.6

2.0 6.7 3.6 1.8 1.1 0.7 0.5

2.5 8.3 4.5 2.3 1.4 0.9 0.7

3.0 10.0 5.4 2.7 1.6 1.1 0.8

3.5 6.3 3.2 1.9 1.3 0.9 0.5

4.0 7.2 3.6 2.2 1.5 1.1 0.6

4.5 8.1 4.1 2.5 1.7 1.2 0.7

5.0 9.1 4.5 2.7 1.8 1.3 0.8

6.0 10.9 5.4 3.3 2.2 1.6 0.9

7.0 6.4 3.8 2.6 1.8 1.1

8.0 7.3 4.4 2.9 2.1 1.2

9.0 8.2 4.9 3.3 2.4 1.4

10.0 9.1 5.5 3.7 2.6 1.5

11.0 10.0 6.0 4.0 2.9 1.7

12.0 10.9 6.6 4.4 3.2 1.8

13.0 11.8 7.1 4.8 3.4 2.0

14.0 7.7 5.1 3.7 2.2

15.0 8.2 5.5 4.0 2.3

16.0 8.8 5.9 4.2 2.5

17.0 9.3 6.3 4.5 2.6

18.0 9.9 6.6 4.8 2.8

19.0 10.4 7.0 5.0 2.9

20.0 11.0 7.4 5.3 3.1

25.0 9.2 6.6 3.8

30.0

35.0 9.2 5.4

40.0 10.6 6.2

45.0 11.9 6.9

50.0 7.7

55.0 8.5

60.0 9.2

65.0 10.0

70.0 10.8

75.0 11.5

⅜ ½ ¾ 1 1¼ 1½ 2

Velocity > 12 ft/sec

Flow Velocity ft/sec

Velocity < 0.5 ft/sec0.75 2.5 1.4 0.7

11.0 7.9 4.6

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Page 22

Design Considerations

Viega PureFlow Pressure Loss

Viega recommends the following velocities for hot and cold PEX water distribution systems:

■ Domestic cold water — 10 fps

■ Domestic hot water — 8 fps

The 󶈶ow velocity through Viega’s PEX 󶈵ttings does not fall under these limitations. The equivalent length of PEX tube for Viega PureFlow 󶈵ttings is available from Viega to assist in system sizing where applicable (refer to “Viega PureFlow Press Friction Loss” on page 20 ).

Flow Rate

GPM

0.5 2.0

0.75 4.1

1.0 7.0 1.6

1.5 14.9 3.4

2.0 25.4 5.8 1.1

2.5 38.5 8.7 1.6

3.0 53.9 12.2 2.3

3.5 16.2 3.0

4.0 20.8 3.9 1.1

4.5 25.8 4.8 1.4

5.0 31.4 5.9 1.7

6.0 44.0 8.2 2.4

7.0 10.9 3.2 1.2

8.0 14.0 4.1 1.6

9.0 17.4 5.1 1.9

10.0 21.1 6.2 2.3 1.0

11.0 25.2 7.4 2.8 1.2

12.0 29.6 8.8 3.3 1.5

13.0 34.3 10.1 3.8 1.7

14.0 11.6 4.4 2.0

15.0 13.2 5.0 2.2

16.0 14.9 5.6 2.5

17.0 16.7 6.3 2.8

18.0 18.5 7.0 3.1

19.0 20.5 7.7 3.4

20.0 22.5 8.5 3.8 1.0

25.0 12.8 5.7 1.5

30.0

35.0 10.7 2.9

40.0 13.7 3.7

45.0 17.0 4.6

50.0 5.6

55.0 6.6

60.0 7.8

65.0 9.0

70.0 10.4

75.0 11.8

Note: Pressure loss based on Hazen-Williams formula (C = 150).

Pressure loss for actual length can be calculated by following formula: Actual length / 100 ft x value from chart above.

⅜ ½ ¾ 1 1¼ 1½ 2

Pressure Loss

Excessive as Flow

velocity is > 12 ft/sec

60°F (16°C) Water

Pressure Loss PSI/100 ft of Pipe

Pressure Loss <1 psi

18.0 8.0 2.2

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ManaBloc Systems

Viega Manifolds

Viega o󶈴ers several di󶈴erent manifolds to meet a variety of applications, whether it is a parallel water distribution system or combination installation.

Viega Manifold Markings

Each Viega manifold is marked, where space permits, with the following information:

Manufacturer VIEGA

ASTM Standard ASTM F877 / F1807 / F2159

Temperature Rating 180°F

Certi󶈵cations

Note: All manifolds may not be listed with each

organization shown

WARNING!

To maintain your warranty and be code compliant, use only

Viega-approved port adapters and supply adapters to connect Viega PureFlow PEX tubing to the ManaBloc.

Viega polymer manifolds must be protected from UV exposure, which can damage them. In the event of incidental UV exposure during storage, installation, and handling, combined exposure of Viega polymer manifolds shall not exceed 15 days.

UPC

, cNSF®us pw-G, CSA

B137.5, ICC-ES PMG

™

1038

ManaBloc Design and Sizing

The general sizing information shown below may be appropriate for many ManaBloc installations. These recommendations are based on 󶈶ow rates of typical 󶈵xtures that require 8 psi residual pressure.

The length of distribution tubing run between the Viega ManaBloc and each 󶈵xture shall be 50 feet or less to maximize optimal performance of the ManaBloc system. Exceeding this recommended distance a󶈴ects the system’s ability to e󶈷ciently deliver hot water, lengthening the time it takes for hot water to reach the 󶈵xture as well as increasing water waste. Check with local code for run length requirements.

If this cannot be accomplished with one ManaBloc, multiple ManaBlocs may be required. Place one at each end of the home to split the distribution line distance between them (see the section on “Multiple ManaBloc Installations” on page 26.)

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ManaBloc Systems

Supply and Distribution Line Sizing

The best water and energy savings of a ManaBloc system are realized when distribution lines are sized according to the 󶈵xture demand and the length of the individual line. Viega recommends the following tube sizing.

Typical supply line size:

■ ¾" up to 2½ baths

■ 1" up to 4½ baths

Typical distribution line size:

■ ⅜" up to 2½ GPM 󶈵xture 󶈶ow

requirement (lavs, toilets, bidets, bar sinks, kitchen sinks, dishwashers)

■ ½" up to 4 GPM 󶈵xture 󶈶ow

requirement (hose bibbs, tubs, showers, washing machines, whirlpool baths, soaking tubs, etc.)

Consult the 󶈵xture manufacturer’s literature to determine the actual 󶈵ll rate and residual pressure requirements for distribution line size. In addition, con󶈵rm with local Authority Having Jurisdiction (AHJ) for acceptable PEX tubing size.

Note: If a hose bibb is primarily for irrigation purposes, it should be supplied from the main service line prior to the ManaBloc.

A Viega PureFlow Press and PureFlow Crimp ManaBloc come with ½" ports that are designed to 󶈵t both ⅜" and ½" PureFlow port adapters.

Water Heater Placement

The Viega ManaBloc should be as close as possible to the water heater to minimize extra water from being stored in the larger hot water supply lines between the ManaBloc and water heater.

The longer the hot water supply line is, the greater the volume of water needed to purge through that line and faucet before hot water is available. This creates water waste and longer hot water delivery times (see “ManaBloc Location” on page 25 for more information).

Distribution Line Sizing to Fixture

Proper water distribution line sizing to each 󶈵xture is crucial for overall system performance. If you oversize a distribution line to a 󶈵xture (½" PEX line supplying a sink instead of a ⅜" PEX line) you are essentially doubling the volume of water being stored in that line. It can take roughly twice as long to purge an oversized line compared to a properly sized line.

The 󶈵xture is what dictates water 󶈶ow (federally mandated, governed by code). The tubing applies a friction loss dictated by its size and length. Therefore, as long as you do not undersize a distribution line or run it excessive distances (60 feet or greater), the system will perform properly, maintaining su󶈷cient pressure and 󶈶ow.

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Page 25

ManaBloc Installation Overview

Carton Contents

Hot Water

Valve Key

Supply Inlet

Port Valve

Cold Water Supply Inlet

or Outlet

Typical 24-Port ManaBloc

Cold Water

Supply Inlet

or Outlet

Internal Divider Plate

Cold Port(s)

Plastic Mounting

Bracket

Hot Port(s)

Cold Port(s)

Additional package contents include:

■ Valve T-Handle

■ Instruction Sheet/Drill Guide

■ Port Labels

ManaBloc Location

The ManaBloc is much like an electrical breaker box. When a 󶈵xture needs repair, the line to that 󶈵xture may be shut o󶈴 at the ManaBloc, eliminating the need to shut down the water supply for the entire house. This feature requires that the ManaBloc be accessible after installation.

Before installing the ManaBloc, review the following instructions.

BEFORE INSTALLING THE MANABLOC, MAKE SURE THE FOLLOWING LOCATION REQUIREMENTS HAVE BEEN MET.

COLD WEATHER CAUTION!

The thermoplastic components of the ManaBloc, like

all thermoplastics, have decreased resistance to impact under freezing conditions and can be damaged. Care must be exercised when installation occurs in freezing conditions.

Take extra caution when handling the ManaBloc in temperatures that are below freezing. Tubing penetrations may require sleeving or the installation of an insulator.

ManaBloc Systems

1. UNDER NO CIRCUMSTANCES shall the ManaBloc be located in a permanently covered area (behind sheetrock, plywood, paneling) or where freezing temperatures may occur. Do not install in direct sunlight. THE MANABLOC MUST BE ACCESSIBLE and there shall be su󶈷cient clear area in front of the ManaBloc to provide access.

2. When local code allows, mount the ManaBloc unit in a 󶈵re-rated wall, provided an access door is installed over the access opening that meets the same rating requirements as the wall.

3. When installing the ManaBloc in a location other than between studs, provisions must be made to support the tubing runs as they exit the ManaBloc (see “Bending PureFlow PEX Tubing” on page 35).

4. Any installed cover panel shall allow access to the ManaBloc and its mounting screws, the port valves, distribution line connections, and supply line connections.

5. To maximize potential water and energy savings, the ManaBloc should be mounted as close as is practical to the hot water source, taking the following into consideration:

a. When the ManaBloc is mounted

above the water heater, there shall be a minimum of 36" of connecting tubing between the water heater and the ManaBloc to reduce the chance of heat stacking.

b. When the ManaBloc is mounted

beside the water heater and is connected with tubing incorporating a horizontal 󶈶ow, there shall be at least 18" of developed tube length. Mounting the ManaBloc within eight feet of developed tube length of the water heater will minimize delivery time of hot water to individual 󶈵xtures. The ManaBloc may be mounted closer than 12" to the

PG-PF 724998 0320 PureFlow System

Page 26

ManaBloc Systems

hot water source (tank) if it does not exceed the minimum allowable vertical and horizontal spacing outlined in this section.

c. Install the unit in an area that is

centrally located to the most dense concentration of served 󶈵xtures. Some applications will require that the ManaBloc be mounted farther than eight feet from the hot water source. For design factors in installing a parallel system, refer to the PureFlow Water System Installation Manual for suggestions on reducing hot water delivery times in these instances.

18" to 8' total

developed tube length

36" min.

ManaBloc Locations

6. DO NOT install the ManaBloc within a continuously recirculating hot water plumbing loop. The ManaBloc, however, may be supplied from a recirculating hot water loop (refer to “Domestic Hot Water Circulating Systems” on page 49 for recommended options).

7. Position the ManaBloc so that it can be securely fastened through the holes provided in the mounting brackets. The mounting surface should be as 󶈶at as possible so as not to induce any twisting or bending forces on the unit. The mounting straps (part number

45716) simplify mounting between studs on 16" centers.

Multiple ManaBloc Installations

If a home requires multiple ManaBlocs to service the number of 󶈵xtures in the home, these guidelines should be followed if the ManaBlocs are closely located to each other.

■ Consider dividing high-demand

󶈵xtures between the units.

■ Consider a reasonable division, i.e.,

upstairs/downstairs, east/west, or front/back.

Domestic Hot Water Circulating Loop Supplying Two ManaBlocs

Hot return

Circ Pump

Hot water supply

Check valves

Hot

Cold

Water heater

Cold supply

Cold water supply Hot water supply

Hot return

End cap

Locating a Remote ManaBloc

A remote ManaBloc is sometimes recommended to achieve maximum e󶈷ciency from your ManaBloc system. It is advantageous when the line lengths are excessive from one centralized ManaBloc unit. When the home requires more than one unit due to the number of 󶈵xtures or size of the home, consider locating a remote unit near an outlying group of 󶈵xtures.

PG-PF 724998 0320 PureFlow System

Page 27

ManaBloc Supply Piping Options

Flow-thru piping

(standard)

Hot water from W/H

Cold water to W/H

Non-flow-thru piping

Top supply

(Bull head tee)

Hot water from W/H

Cold water supply

ManaBloc Systems

Water service (cold)

Cold water supply to

Bull head tee

W/H

Hot water from W/H

Cold water to W/H

Non-flow-thru

piping

Top supply

(Standard)

End cap

Water service

(cold)

If a main inlet/outlet will not be used, it must be capped. (Use part number 53601.)

PG-PF 724998 0320 PureFlow System

End cap

The main service line to the ManaBloc may include a main shuto󶈴 valve, as required by local code. Although a shuto󶈴 valve for the main service line at the ManaBloc itself is not required, it can be a bene󶈵cial option for a homeowner and is recommended.

Optional ManaBloc shutoff

Local code may also require the installation of a check valve, Pressure Reducing Valve (PRV), back 󶈶ow preventer, etc. To prevent debris and other particles from entering the system, a strainer may be installed in the service line.

Page 28

ManaBloc Systems

Draining the ManaBloc Unit

If the ManaBloc system has been 󶈵lled with water and there exists the possibility that the ambient temperature will drop close to or below 32°F (0°C), the ManaBloc unit MUST be drained to prevent irreparable damage. The process of draining involves loosening and removal of one or more supply line connections and two distribution lines from the ManaBloc.

Note: Depending on the installation, some supply connections may be capped. If that is the case, remove the cap(s) as instructed below.

1. Turn o󶈴 all water supply(s) feeding the ManaBloc. Open both sides of all 󶈵xtures served by the manifold and leave the 󶈵xtures open during draining. For each port of the ManaBloc where there is a distribution line connected, make sure the port valve is in the open position.

2. Loosen and remove the bottom supply connection(s) (or cap(s)) and the lowest pair of hot and cold distribution lines.

3. As the connections are removed, most of the water contained in the ManaBloc main bores and some of the water in the distribution lines should purge from the system.

4. Allow to drain until no water purges.

5. Reattach the supply line(s) or cap(s) and the distribution lines. Tighten the supply connections according to the instructions in the PureFlow Water System Installation Manual. When reconnecting the distribution lines, DO NOT overtighten the connections. These only need to be hand-tight.

Note: This procedure will leave a small amount of water in the ManaBloc unit and, depending on the installation, may leave some or most of the water in the distribution lines. This remaining water should not cause damage to the manifold unit or to the PEX distribution lines in the event of a freeze. However, for complete assurance that freeze damage will not occur, perform the following additional steps.

Draining the ManaBloc System

1. Loosen and remove all of the supply line connections (or caps) and all of the distribution lines from the ManaBloc.

2. Remove the four attachment screws and withdraw the ManaBloc unit from its mounting. Note: Grasp the unit 󶈵rmly before removing the last attachment screw to prevent the unit from falling and being damaged.

3. Completely drain the ManaBloc unit by inverting the unit several times until there is no water coming from any of the supply connections or ports.

4. To purge the PEX distribution lines, 󶈵rst make sure that both sides of all of the 󶈵xtures are in the open position. Using low-pressure air from a tank or compressor, force the water from the lines by connecting the air pressure source to each line one at a time and blow air through the lines until no water 󶈶ows from the 󶈵xtures.

5. Reattach the ManaBloc and reconnect the supply and distribution line connections.

Note: When reconnecting the distribution lines, DO NOT overtighten the connections. Compression connections should require only about ⅛ turn past hand-tight when reinstalling connections that were previously tightened to the speci󶈵cations outlined in the installation guide. PEX Press and PEX Crimp connections must be only hand-tightened.

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ManaBloc Systems

Mounting the ManaBloc

Mounting the ManaBloc Between Studs

Dimensions in these instructions are for 16" stud centers and must be adjusted for other stud spacing.

Once the general location of the ManaBloc has been determined (see “ManaBloc Location” on page 25), the ManaBloc may be mounted to a suitable surface between a pair of adjacent studs. For 16" stud spacing, the mounting straps (part number 45716) can simplify installation.

Note: The wall in which the ManaBloc is mounted must be accessible from both sides during installation to use the mounting straps.

Additional tools and materials:

■ Electric drill

■ #2 Phillips head screwdriver

■ Pencil or pen

■ Permanent marking pen (optional)

■ Framing square

■ Tape measure

■ ¾" and 1¼" wood drill bits

■ ManaBloc wrench - for compression

ManaBlocs only (optional)

■ Wood or drywall screws - ½" or longer

■ ½" or ¾" plywood - when 󶈶ush

mounting ManaBloc

1. Lay the ManaBloc, plastic brackets down, on a suitable 󶈶at surface that is large enough to accommodate the full length of the ManaBloc. Place a mounting strap under each plastic mounting bracket (located at the top and bottom ends of the ManaBloc). Attach the plastic mounting bracket at one end of the ManaBloc to the two outer center holes of a mounting strap using the provided self-tapping pan-head screws. The screw heads must be on the accessible side of the mounting strap. Repeat at the other end of the ManaBloc. Tighten screws securely.

2. Standing behind the stud wall,

3. Standing behind the stud wall, hold

4. Line up the LOWER mounting strap with

measure up from the 󶈶oor and make a mark on the back of one of the studs to represent the top of the ManaBloc. This mark should be between four and six feet from the 󶈶oor but may be at any height, provided the height will allow all valves on the ManaBloc to be accessible. With a framing square or level, transfer and mark the noted height on the other stud. Note:

A residence intended for disabled persons may require that the ManaBloc be mounted lower in the wall to provide access.

Measure up from the floor while standing behind the stud wall. Mark a location for the top of the ManaBloc.

4' to 6'

from floor

the ManaBloc facing away from you and align the top of the UPPER mounting strap to the line on the stud that you made in Step 2. Loosely attach this mounting strap 󶈶ush to the back outer edge of one stud using a ¾" or longer drywall screw or other suitable wood screw (A).

Attach

here

first

(View from back of wall)

the back outer edge of the stud and attach it in the same manner (B). Attach the remaining strap ends (C and D) to the other stud, and tighten all screws.

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Page 30

ManaBloc Systems

5. Standing in front of the wall, using a framing square or straight edge, mark the center line position of the top and bottom ports onto both studs.

Mark the centers of the top and bottom ManaBloc ports (A, B)

6. Detach the ManaBloc from its mounting straps (or 1x4s) and remove it from the installation area to prevent wood chips or other debris from falling into the unit.

7. Transfer the port location marks made in Step 5 to the insides of the stud cavity using a square and pencil.

8. Measure 1⅝" from the mounting surface. Draw a vertical line on the studs that passes through each of the horizontal port center lines marked in Step 7. Be sure to mark the inside of both studs.

1⅝"

9. Push a small nail through the printed center line at one end of the Drill Guide (A). Push the nail into the cross formed where the top port mark intersects with the 1⅝" mark. Tap the nail into the stud to hold the Drill Guide in place.

10. Push a small nail through the printed center line on the lower end of the Drill Guide with the center line of the port (B). Tap the nail into the stud to hold the Drill Guide in place.

11. Using an awl, nail, or other pointed tool (C), mark the stud by tapping through the Drill Guide at each printed center line between the two nails.

12. Carefully remove the Drill Guide and repeat the marking procedure on the adjacent stud.

13. Drill ¾" holes through both studs at each marked location. Be sure to hold the drill level, perpendicular to the stud to prevent drilling holes at an angle. Remove any splinters or burrs made during drilling.

14. Mark and drill any holes for main water supply and hot water supply/ return lines at this time. A 1¼" bit will provide adequate clearance for ¾" or 1" tubing. The tubing shall enter and/ or exit the ManaBloc in a straight line so as not to induce bending stress on the ManaBloc. Necessary elbows, couplings, and tees are allowed in the main water supply lines.

Drill ¾" holes for distribution lines, 1¼" holes for supply lines.

15. Reattach the ManaBloc to the mounting straps.

When the ManaBloc is installed prior to wall 󶈵nishing operations, the unit MUST be protected from

paint, texture compounds, and drywall dust.

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ManaBloc Systems

Mounting the ManaBloc – Without Mounting Straps

If not using the mounting straps, this procedure applies:

1. Cut two pieces of lumber (1x4 or ¾" plywood approximately 3½" wide) to a length that provides a snug 󶈵t BETWEEN two studs.

2. The top of the ManaBloc should be between four feet and six feet from the 󶈶oor (but may be at any height provided that it maintains accessibility to all of the ports on the ManaBloc). Make a mark near the back of the inside of one stud that would represent the top of the ManaBloc. With a framing square or level, mirror the mark on the inside back of the other stud.

3. Attaching the ManaBloc between the studs:

a. Measure the total length of the ManaBloc. b. Attach the 󶈵rst (UPPER) 1x4 inside

and 󶈶ush to the back of the studs at a height where the center of its width is centered on the marks from Step 2.

1x4

(Top view)

1x4s attach at the back, inside the studs, and the ManaBloc is centered between the studs.

c. Attach the remaining (LOWER) 1x4

inside and 󶈶ush to the back of the studs at a distance below the upper 1x4 that is equal to the length of the ManaBloc (Step 3a) when measured from the top of the upper 1x4 to the bottom of the lower 1x4.

Step C:

Distance

between top

and bottom

of 1x4s equal

to length of

ManaBloc

(Front view)

4. CENTER THE MANABLOC IN THE STUD CAVITY: Attach the ManaBloc to the 1x4s with four ½" - ¾" drywall screws. DO NOT OVER TIGHTEN.

5. Continue to Step 5 on the previous page to 󶈵nish the installation.

Mounting the ManaBloc – Surface Mount

1. A suitable base for the ManaBloc can be constructed from a section of ½" or thicker plywood that is a minimum 22½" wide and slightly longer than the overall length of the ManaBloc.

2. Securely attach a length of 2x4, or other suitable framing material with a thickness of 1½" and about 3½" wide, on the left and right sides of the mounting base running the full length of the ManaBloc. The 2x4s will be used to secure the distribution lines at the correct height as they exit the ManaBloc. (Support clamps not to exceed 6" spacing from end of ports.)

Longer than ManaBloc

3. Attach the mounting base to the structure in a suitable location (see “ManaBloc Location” on page 25). The base should be mounted so the top of the ManaBloc is between four feet and six feet from the 󶈶oor but may be at any height provided that the height maintains accessibility to all the ports on the ManaBloc.

Longer than ManaBloc

2x42x4

MANABLOC

2x42x4

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ManaBloc Systems

4. The mounting base must be 󶈵rmly attached to a structure solid enough to support, at a minimum, the weight of the ManaBloc 󶈵lled with water. The base should be square and level.

5. Center the ManaBloc on the base both vertically and horizontally. Attach the ManaBloc to the mounting base with four ½" or longer drywall screws or wood screws through the holes in the plastic brackets on the ManaBloc. DO NOT OVERTIGHTEN.

4"- 6"

90°

6. As the distribution lines are connected to the ManaBloc (refer to the PureFlow Water System Installation Manual), ensure that the tubing exits the unit at a 90° angle to the center line of the ManaBloc so as not to induce bending stress on the ManaBloc.

7. When attaching the distribution line tubing to the 2x4 supports, be sure to use appropriately sized Viega tubing clamps. (For example, use part number 52000 for ⅜" tubing and part number 52020 for ½" tubing.) Use one clamp per tube to ensure that the tubing is held securely. Position clamps NO FARTHER than 6" from the end of the port. DO NOT pull tubing tight.

Mounting the MiniBloc

1. For proper bracket spacing, measure distance between the center ribs of the 󶈵rst and last MiniBloc modules. Mark this distance on the selected mounted surface.

2. Align the outside edge of each bracket within each end mark. Mounting brackets shall be mounted level and parallel to each other before a󶈷xing the MiniBloc manifold. Note: Use both mounting brackets provided with each MiniBloc manifold. Ensure the mounting surface is suitable to support the weight of the manifold and attached tubing when 󶈵lled with water.

3. Use two wood screws per bracket, 1" or longer, to prevent misalignment.

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ManaBloc Systems

4. Position bottom metal tie-rod into the bottom clip of the mounting brackets then roll manifold toward top clip. The MiniBloc may be mounted either vertically or horizontally.

Vertical

mount

Horizontal

mount

5. Complete mounting by 󶈵rmly pushing the MiniBloc toward the top clip of the mounting brackets, which should spread and snap over top of the metal tie-rod.

Vertical mount

Horizontal

mount

Mounting PureFlow Press and PureFlow Crimp Polymer Manifolds

Viega recommends using a minimum of two mounting brackets on manifolds with three ports and larger.

1. Measure the distance (A) between the 󶈵rst and last set of manifold ports (as shown below). Using a straight edge, mark dimension (A) on the mounting surface. Ensure the mounting surface is level and suitable to support the weight of the manifold 󶈵lled with water.

2. Align the 1¼" lock clips (B) with the marks transferred on the mounting surface from Step 1 and attach them using a 1" or longer screw appropriate for the mounting surface. Note: Lock clips sold separately (part number 58075).

3. With the lock clips in the open position, insert the manifold body into the clips, centering them between the end ports.

4. Push evenly on both ends of the manifold until lock clips snap manifold body 󶈵rmly into place. Note: Lock the clips into their second locking position to adequately secure the manifold.

2 3

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Installing PureFlow Systems

Storage Recommendations

Do’s

1 2

Inspect pipe and 󶈵ttings before

installing on the job site.

Damaged sections of tubing should be

cut out and discarded.

Don’ts

5 6

Do not expose Viega PureFlow tubing

to sunlight or UV source for extended periods of time.

Do not expose Viega PureFlow tubing

to sharp objects or open 󶈶ames.

Cover any PEX exposed to direct

sunlight with an opaque covering.

Handle PEX carefully, especially in

freezing weather.

Do not store heavy objects on tubing

or 󶈵ttings.

Do not handle PureFlow pipe and

󶈵ttings roughly by gouging with tools, forcing, or dropping.

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Installing PureFlow Systems

Handling Viega PureFlow PEX Tubing

The properties of Viega PureFlow PEX tubing make it easy to work with and install in most types of construction. Some care must be taken to prevent damage to the tubing before and during installation:

■ Use care to protect both Viega PureFlow

PEX and FostaPEX tubing from physical damage during storage and installation. Keep the tubing away from sharp objects, open 󶈶ames, etc., and do not place heavy objects on the tubing.

■ Damaged sections of tubing should be

cut out and discarded.

■ Do not expose Viega PureFlow PEX

tubing to sunlight or any UV source for extended periods of time exceeding six months.

■ FostaPEX, with its aluminum layer, is

resistant to UV light, but long-term exposure should still be avoided.

■ Do not store Viega PureFlow PEX or

FostaPEX tubing outdoors where it may be exposed to UV light.

Uncoiling PureFlow PEX Tubing

An uncoiler should be used to prevent twisting when removing tubing from ⅜" to 1" coils. Roll coils out and use care to avoid twisting 1¼", 1½", and 2" coils or when an uncoiler is unavailable.

Bending PureFlow PEX Tubing

Viega PureFlow PEX tubing can be free bent (unsupported bend) to a minimum radius of eight times the tubing O.D. and 󶈵ve times the tubing O.D. with the use of a Viega-approved bend support. Viega FostaPEX tubing can be free bent to a minimum radius of eight times the tubing O.D. and 3.5 times the tubing O.D. with the use of a Viega tubing bender. For situations requiring tighter bends, use elbow 󶈵ttings. If bending against a PEX coil bend direction, the bending radius is 24 times the tubing O.D. Viega does not allow the practice of “hot bending” Viega PureFlow PEX tubing to make a tighter bend radius.

Nominal Size*

*Viega PureFlow PEX bend radius values were calculated using standard CTS O.D. dimensions, which are ⅛" larger than the nominal tube size listed.

** FostaPEX bend radius values were calculated using the actual O.D. dimensions, which include the additional aluminum and PE layers.

Viega

PureFlow

Minimum Radius

PEX

Free Bend

(8 x O.D.)

⅜" 4" 2.5"

½" 5" 3.1"

¾" 7" 4.4"

1" 9" 5.6"

1¼" 11" 6.75"

1½" 13" 8.1"

2" 17" 10.6"

Viega

FostaPEX

Nominal

Size**

Minimum Radius

Free Bend

(8 x O.D.)

½" 5.6" 2.4"

¾" 7.5" 3.3"

1" 9.6" 4.2"

Supported

(5 x O.D.)

Supported

(3.5 x O.D.)

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Installing PureFlow Systems

To reduce damaging stress on Viega PureFlow 󶈵ttings, bend supports or tubing fasteners must be used to anchor all bends made close to 󶈵ttings. Support must be provided for tubing bends located closer to 󶈵ttings than distance “L” in the table below (also see the diagrams below for typical installation examples). Since FostaPEX will maintain its shape once bent, supports may not be necessary. However, support must be used at the “L” distance while making the bend.

Minimum bending radius for Viega PureFlow PEX tubing

Radius

Bend

Removing PureFlow Connections

Should a mistake be made, simply cut out the PureFlow 󶈵tting and replace with a new one.

WARNING!

Do not reuse Viega PureFlow 󶈵ttings

Repairs

Sections of kinked tubing should be repaired by cutting out the damaged section and installing a repair coupling.

Using a bend support near a Viega PureFlow connection to reduce stress on 󶈵tting

Using a tubing fastener near a connection to support bend and reduce stress on 󶈵tting

Tubing Size

Maximum distance from fitting to bend

⅜" PEX L = 6 inches ½" PEX L = 8 inches ¾" PEX L = 10 inches

1" PEX L = 12 inches 1¼" PEX L = 14 inches 1½" PEX L = 16 inches

2" PEX L = 18 inches

Inserting a coupling to repair kinked tubing

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Installing PureFlow Systems

Freezing

The 󶈶exibility of Viega PureFlow PEX tubing makes it resistant to damage from freezing, but precautions to prevent freezing should be taken when low temperatures might be encountered.

Insulating each PEX tube individually or as a group is not generally necessary if the PEX tubing is installed within the insulation envelope of the structure, i.e., the heated area. For example, the tubing may be installed under the insulation in the attic or within an interior wall of a heated space.

PureFlow PEX tubing systems should not be intentionally subjected to freezing.

Do not use open torch or excessive heat to thaw PureFlow PEX tubing. Tubing failure or damage can result.

Heat (DO NOT USE A TORCH) must be applied directly to the frozen tubing section. Temperature on tubing shall not exceed 180°F.

Several suitable methods exist to thaw PureFlow PEX tubing:

• Hot water

• Wet, hot towels

• Hand-held hair dryer

• Low-wattage electrical heating tape (self limiting)

• A commercial system that pumps heated water through a tube to the ice blockage

and returns the cooled water for reheating

Water Heaters

Viega PureFlow PEX tubing should not be connected directly to gas-󶈵red water heaters. The high temperatures of these appliances can damage the tubing.

When connecting a Viega PureFlow system to a gas-󶈵red water heater, install a minimum of 18" of metallic piping between the water heater and tubing, keeping tubing more than 6" away from the vent pipe. Where local code allows, Viega PureFlow PEX tubing may be connected directly to electric water heaters and used for hot water recirculation lines that do not come within 6" of the gas heater vent.

A minimum of 18" of metallic piping is required between a gas-fired water heater and PEX tubing.

Viega PureFlow PEX may be used to connect to instantaneous/tankless water heaters or other hot-waterproducing devices. However, consult manufacturer’s recommendations for use with plastic tubing and ensure temperature and pressure do not exceed the maximum ratings of the tubing.

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Installing PureFlow Systems

Heaters, Flues, Vents, and Recessed Lights

Keep Viega PureFlow PEX tubing a MINIMUM of 12" vertically and 6" horizontally from sources of high heat such as gas 󶈶ue vents, heating appliances, or electric motors.

12" minimum

6" minimum

Maintain a minimum 12" of vertical and 6" of horizontal clearance from recessed lights and appliance or heater vents.

Concerning recessed lighting (including low-voltage types) and proper installation clearance, Viega recognizes the following types of lighting 󶈵xtures: Type IC or Inherently Protected, which allows direct contact with thermal insulation and other combustible materials, and Type Non-IC, which requires a minimum clearance of 3" from thermal insulation. If room does not allow for the minimum clearance spacing speci󶈵ed by Viega, then the PEX tubing must be insulated with a suitable pipe insulation capable of withstanding the speci󶈵c maximum temperatures generated by the 󶈵xture. Minimum clearance between any pipe insulation and 󶈵xture shall be per the requirements of the 󶈵xture type and local building codes.

Forced air heating ducts and PVC power vent 󶈶ues are not generally considered sources of high heat. These areas of installation should be rechecked after further construction and other mechanical systems have been installed.

In cases where light leakage (direct beam) from a UV-generating light source (special lighting or heating-type lamps) is possible, tubing must be adequately protected with light-blocking insulation.

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Installing PureFlow Systems

Fastening the PureFlow System

Wood Frame Construction

Viega PureFlow PEX and FostaPEX tubing are ideal for use in wood frame construction. The ability to bend the tubing around corners and obstacles greatly simpli󶈵es installation. This system eliminates the expensive and timeconsuming use of 󶈵ttings where tubing turns within a wall, and it eliminates the potential 󶈵re hazard of soldering close to exposed framing members.

A few rules should be followed when running Viega PureFlow PEX tubing in wood frame construction:

■ Use nailing plates to protect the tubing

from nails and screws where it passes through studs.

Steel Construction

The Viega PureFlow system works as well in steel frame construction as it does in wood. Where tubing runs through metal studs, suspension clip fasteners must be used to protect tubing from sharp stud edges (see illustration below). Follow the same guidelines for fastening and supporting the tubing as for wood frame construction.

Suspension clip fasteners used to protect tubing from abrasion when passing through steel studs

■ Suspension clips are required for metal

studs and optional for wooden studs.

■ When turning tubing sharply to exit

from a wall, a bend support must be used. Either use a drop-ear bend support, drop-ear elbow, or a stub out. Neglecting to use a support will place excessive stress on the 󶈵tting, and the tubing will not exit perpendicular to the wall (except FostaPEX).

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Installing PureFlow Systems

Supporting PureFlow PEX Tubing

Use only plastic or plastic-coated tubing supports. Metal supports may damage tubing.

When running tubing, leave a small amount of slack between fasteners to account for tubing contraction.

Note that Viega PureFlow PEX tubing will expand or contract 1.1" per 100 feet for every 10°F of temperature change. In long straight runs, allow adequate clearance for this (see “Tubing Expansion” on page 45). The aluminum layer in FostaPEX reduces expansion and contraction, so that it expands only 0.16" per 100 feet for every 10°F of temperature change. This makes it ideal for locations where expansion must be minimized.

Tubing should be allowed freedom to move slightly as it expands. Do not clip it tightly into place or locate it where it will be tightly constrained. Use suspension clips or an approved plastic insulator where tubing passes through studs or joists where abrasion and noise are a concern.

Suspension clip fasteners used at floor plate

Viega PureFlow PEX tubing must be fastened at a minimum interval noted in the table below for vertical and horizontal support.

PEX Size Horizontal Vertical

Viega

PureFlow

FostaPEX

PEX Support

½" - 1" 32" O.C. Base

1¼" - 2" 48" O.C.

PEX

½" - 1" 32" O.C.

of each

󶈶oor with

midlevel

guide

Suspension clips support tubing in joist penetrations or anywhere abrasion is a concern.

In risers or vertical runs, Viega PureFlow PEX and FostaPEX tubing should be attached with suspension clips or an approved plastic insulator at each 󶈶oor or ceiling penetration, and every four feet in between.

WARNING!

Some model codes may allow greater support spacing

intervals for plastic tubing. Always refer to local code for approved spacing requirements that exceed the ones referenced in this guide.

Spacing per PEX

Support Table

Tubing supported with U-clip or lock clip fasteners on horizontal runs

Midlevel

Guide

J-clamp or lock clip fasteners used to support tubing in vertical runs between floors

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Installing PureFlow Systems

Installation Considerations

PEX Risers

Viega PureFlow tubing can be used as a riser to supply multiple 󶈶oors with hot and cold water. To help control thermal expansion between multiple 󶈶oors, use a midlevel guide at every 󶈶oor and riser clamps at the following intervals:

Support

There are a variety of clamps and hangers to support PEX tubing risers to support members or wall surfaces. Always use products designed for use with plastic tubing that have no sharp edges or that can potentially 󶈶atten or crush PEX tubing.

Viega o󶈴ers two types of multi clips that will 󶈵t up to 2" PEX tubing. One is designed to mount to a wall surface and comes with a mounting screw. The other type is designed to insert into a Uni-strut support bar. Lock clips, tubing insulators, and suspension clips are also available for use with PEX tubing. Ring clamps, clevis, or teardrop hangers shall have a rubber or protective lining when used with PEX tubing.

Hot Lines

Use clamps above and below the 󶈶oor every other 󶈶oor, with a single clamp above the 󶈶oor in between.

Cold Lines

Use clamps above and below the 󶈶oor every fourth 󶈶oor, with a single clamp above each 󶈶oor between.

PG-PF 724998 0320 PureFlow System

Installing PEX Under a Roadway

Viega PureFlow PEX tubing can be installed under a roadway as long as it is buried to the minimum frost level depth required by local code and following proper direct burial practices for plastic pipe.

Page 42

Installing PureFlow Systems

PEX Support Trays

PEX support trays are for use with clevis hangers and/or coated ring clamps to help reduce the number of support hangers that are required for hanging PEX tubing. These trays are available in 10-ft. lengths for 1" through 2" PEX tubing sizes.

Installing PEX Support Trays

1. Install hangers at recommended spacing per table below.

2. Install PEX tubing, slide the support trays under the tubing and into the hangers.

Spacing Intervals

Tubing

Size

Between Hangers*

Hanger to End of Tray Between

1" 8' max min 1x nominal tube size 32" 2" min 4" min

1¼" - 2" 8' max min 1x nominal tube size 48" 2" min 4" min

* Where trays are installed continuously it may be necessary to use closer hanger spacing to maintain a consistent hanger interval. ** A maximum of two continuous tray lengths shall be used where thermal compensation and/or o󶈴sets are required, typically every 50 ft.

3. Snap the tubing into the support trays.

4. Trays shall be strapped to the tubing using Viega zip ties (or equivalent) every 48" (two straps for trays less than 48" in length) for clevis and/ or teardrop hangers and only once between clamp-type hangers.

CAUTION!

When using tin snips or a reciprocating saw to trim support

trays for shorter tubing runs, be sure to remove any sharp edges prior to installing trays onto the PEX tubing.

Note: Where space is available, it may be easier to install the support trays on the PEX tubing while on the 󶈶oor and then install the tubing with trays attached onto the hangers.

Fitting

Trays

Tray Overlap**

to Tray

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Page 43

Installation Details

Hanger to end of tray

Fitting to tray / between trays

Installing PureFlow Systems

Tray strapping detail

Pipe Labels

When pipe labels are required, it is acceptable to place 󶈶exible, pressuresensitive stickers directly on Viega PureFlow tubing and/or on jacketed insulation that is installed over the tubing. If label adhesion is an issue, zip ties can be used to assure long-term placement. Refer to local code for required pipe labeling and placement.

Overlap detail with straps

PEX tubing and/or fittings installed between trays (exposed) shall be wrapped with a minimum thickness of ½" E84 rated insulation. Refer to Viega PureFlow listing on www.qai.org

Plenum installation

PG-PF 724998 0320 PureFlow System

Noise and Water Hammer

As with all plumbing materials under some operating conditions, a water hammer can occur in PEX plumbing systems. The inherent 󶈶exibility of Viega PureFlow PEX drastically reduces the magnitude of pressure surges compared with metallic plumbing materials. Damage to plumbing components in a PEX system due to these pressure surges is highly unlikely, although noise can sometimes result. Fortunately, there are solutions to minimize or eliminate water hammer noise.

Page 44

Installing PureFlow Systems

■ Install 󶈵xtures that are not water

hammer prone. As a general rule, two-handle 󶈵xtures are less likely to cause a hammer than single-handle 󶈵xtures. Single-handle shower valves, which rotate to close and therefore are di󶈷cult to close quickly, might be good choices.

■ Clamping or strapping more frequently

may help prevent tubing noise. It is important that the tubing not be in contact with the wallboard, forced air ducts, or other high-resonance articles. Insu󶈷ciently or improperly clamped or strapped tubing may move during 󶈵xture operation and hit against these surfaces.

■ Install a water hammer arrester at

󶈵xtures where noise is a problem. A water hammer arrester (AA sized) installed as closely as possible to the 󶈵xture on the cold-water side only will eliminate the source of the noise (the pressure wave). It should be noted that even with an arrester, tubing that is clamped or strapped insu󶈷ciently may still hit against something as it moves slightly when the water 󶈶ow is stopped.

■ Avoid operating 󶈵xtures in such a

way that causes near instantaneous shuto󶈴. Simply closing 󶈵xtures in a less abrupt manner can eliminate hammer noise.

Shower Valves

PEX lines should only be run to the inlet connections of tub/shower valves unless speci󶈵cally approved by the valve manufacturer for other connections.

Electrical Grounding

Neither Viega PureFlow PEX nor FostaPEX tubing may be used as an electrical ground. Consult the NEC for recommended grounding method when plastic pipe is used.

Expanding Foams

When penetrations must be sealed for air in󶈵ltration purposes, there are several options available. Use a good grade of silicone, acrylic, or siliconized acrylic caulking. DO NOT use oil-based caulks. Other materials may be used provided they do not cause short- or long-term damage to the PEX tubing.

WARNING!

When using expanding spray foam to insulate walls in a

structure, there are several options available. Viega suggests using water-based or urethane-based open-cell insulation only. Do not use closed-cell spray foams. Both open-cell and closedcell spray foams have the potential to generate high temperatures during their expansion process, especially when not applied properly, which can damage PEX tubing. Therefore, Viega suggests applying open-cell spray foam in layers up to 1.5 inches thick and allowing the insulation to cool before applying additional layers. Additionally, Viega’s PureFlow polymer 󶈵ttings and manifolds should be wrapped with a protective coating prior to the application of spray foam to avoid damage. Protective coatings can be either a polyethylene 󶈵lm or aluminum wrap. Viega’s metallic 󶈵ttings do not require additional protection from open-cell spray foam. Always follow the spray foam manufacturer’s installation instructions and warnings.

Do not expose Viega products to any foreign substance that includes but is not limited to Volatile Organic Chemical (VOC) compounds, paints, solvents,

glues, cleaners, and disinfectants. Viega products that are exposed to these types of substances are at risk of having failures (leaks).

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Installing PureFlow Systems

Fire Stop Compounds

Most building codes require the use of a 󶈵re-stopping compound when tubing penetrates a 󶈵re-rated wall. There are a number of 󶈵re-stopping compounds identi󶈵ed as water based, acrylic, or latex that have been listed for use with PEX tubing that include but are not limited to the following:

■ 3M Fire Protection – CP 25WB+ Caulk

■ Tremco, Inc – TREMstop

■ Speci󶈵ed Technologies, Inc. –

■ Passive Fire Protection Partners – Fire

SpecSeal

Stop

SSS 100 / SSS 102

™

4800 DW / 4100 DW / 4100 NS /

3600 EX

It is the responsibility of the user to determine the suitability of these or any products for the intended application and install the compounds in accordance with the product’s installation instructions and listing.

Tubing Expansion

Viega PureFlow PEX tubing, as with any PEX tubing, expands and contracts with temperature changes in the environment or the 󶈶uid inside the tubing. The longer the tubing run and the higher the temperature change, the more linear expansion the system will experience. This expansion and contraction can a󶈴ect the appearance as well as integrity of the system by putting stress on the tubing, 󶈵ttings, valves, and fasteners.

Tubing fasteners perform two functions: providing support for the tubing and guiding the tubing during expansion and contraction. It is important to keep this in mind when installing fasteners. An expansion compensator will not be e󶈴ective if the fasteners prevent linear movement of the piping system.

Tubing sizes smaller than ¾" generally do not require expansion compensators with 󶈵ttings and can easily be bent into loops and o󶈴sets to absorb linear expansion. For tubing sizes 1" and larger, refer to “Calculating Expansion Loops and O󶈴sets” on page 46 for compensation options.

For unconstrained tubing runs (not within the 󶈶oor) Viega recommends the use of expansion o󶈴sets. This can be accomplished at a corner or by using o󶈴sets or loops on straight tubing runs. Expansion compensators should be installed at the midway point of tubing runs and should be spaced no more than 50 feet apart.

Using a loop to accommodate tubing expansion

Allow some slack in all runs to prevent damage from tubing contraction.

Offsets also provide room for tubing expansion.

⅛" to 3/16" slack per foot

Below is an example of required o󶈴sets for a 100-foot tubing run. Note that the expansion compensators are no more than 50 feet apart.

50' 50'

100'

25'25' 50'

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Installing PureFlow Systems

Calculating Expansion Loops and Offsets

There are three types of expansion o󶈴sets recommended for use with largediameter tubing: the corner expansion o󶈴set, the Z-type expansion o󶈴set, and the U-type expansion loop. Descriptions and illustrations for each type of o󶈴set are located on the next several pages (see “FostaPEX” on the facing page for FostaPEX recommendations).

Corner Expansion O󶈴set

Where piping takes a corner after a long straight run, a simple 90° elbow in the piping will allow for the absorption of expansion.

∆L

Z-Type Expansion O󶈴set

The Z-type expansion o󶈴set integrates two 90° elbows that form a “Z” pattern.

Anchor point

∆L

Anchor point

Corner Offset

Corner Expansion Example

L = 20.7"

Z-Type Offset

L2 = 5.18"

L1 = 10.35"

Z-Type Expansion Example

∆L

Anchor point

L2 = 5.18"

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Installing PureFlow Systems

U-Type Expansion O󶈴set

The U-type expansion loop integrates four 90° elbows that form a “U” pattern.

∆L/2 ∆L/2

4 - 6" 4 - 6"

Anchor point Anchor point

U-Type Looped Offset

L4 = 8.28"

U-Type Expansion

See the PureFlow Water System Installation Manual or the PureFlow Commercial Water System Design Manual for details on how to do calculations.

L3 = 4.14"

L4L4

L4 = 8.28"

FostaPEX

FostaPEX tubing has a fully dimensional PEX wall with an additional outer layer of aluminum and polyethylene. As a result of these extra layers, FostaPEX expands considerably less than that of standard PEX tubing and slightly more than copper tubing (0.16" per 100 feet per 10°F).

An approved method for expansion absorption when using FostaPEX is through the use of a coiled loop expansion compensator (at least every 50 feet). Do not use 󶈵tting o󶈴sets with FostaPEX as the sti󶈴ness of FostaPEX may lead to high stress at connections.

Coiled Loop

The coiled loop con󶈵guration calls for loops within the piping system. The diameter of the loop (D) is shown in the table and will increase or decrease as the tubing in the system expands and contracts.

Note: Tubing fasteners should be secured as to not prevent linear movement of tubing.

Coiled Loop Expansion

PG-PF 724998 0320 PureFlow System

Coiled Loop Expansion

Tube Nominal Size D (Diameter)

½" FostaPEX 12"

⅝" FostaPEX 14"

¾" FostaPEX 16"

1" FostaPEX 20"

Page 48

Installing PureFlow Systems

The fastener shown on the L3 leg may be required to provide additional support depending on how the expansion loop is installed (horizontal/vertical).

2" 6.4 12.7 7.4 14.7 8.2 16.4 9.0 18.0 9.7 19.5 10.4 20.8 11.0 22.1 11.6 23.2

1½" 5.6 11.1 6.4 12.9 7.2 14.4 7.9 15.7 8.5 17.0 9.1 18.2 9.6 19.3 10.2 20.3

PEX

PureFlow

Viega

1¼" 5.1 10.2 5.9 11.8 6.6 13.2 7.2 14.5 7.8 15.6 8.4 16.7 8.9 17.7 9.4 18.7

1" 4.6 9.3 5.3 10.7 6.0 12.0 6.6 13.1 7.1 14.2 7.6 15.1 8.0 16.0 8.5 16.9

¾" 4.1 8.2 4.7 9.4 5.3 10.5 5.8 11.6 6.2 12.5 6.7 13.3 7.0 14.2 7.5 14.9

1½" 13.9 7.0 16.1 8.0 18.0 9.0 19.7 9.8 21.3 10.6 22.7 11.4 24.1 12.1 25.4 12.7

PEX

PureFlow

Viega

1¼" 12.8 6.4 14.8 7.4 16.5 8.3 18.1 9.1 19.6 9.8 20.9 10.5 22.2 11.1 23.4 11.7

Tubing

Tube

nom.

ΔT(°F)

2" 15.9 8.0 18.4 9.2 20.5 10.3 22.5 11.3 24.3 12.2 26.0 13.0 27.6 13.8 29.1 14.5

L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4

60 80 100 120 140 160 180 200

U-Type Expansion Offset (inch) per 50 linear feet of run

1" 11.6 5.8 13.4 6.7 15.0 7.5 16.4 8.2 17.7 8.8 18.9 9.5 20.1 10.0 21.1 10.6

¾" 10.2 5.1 11.8 5.9 13.2 6.6 14.4 7.2 15.6 7.8 16.7 8.3 17.7 8.8 18.6 9.3

Tubing

Tube

nom.

ΔT(°F)

L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2

60 80 100 120 140 160 180 200

Z-Type Expansion Offset (inch) per 50 linear feet of run

PG-PF 724998 0320 PureFlow System

Page 49

Installing PureFlow Systems

Domestic Hot Water Circulating Systems

A hot water circulation system can be incorporated into most plumbing systems and works by constantly (or periodically throughout the day on a timer) circulating hot water through the main hot supply line of the plumbing system.

This is done by using a return line at the end of the main hot supply line and a low-󶈶ow pump (usually near the hot water tank). The circulating system keeps hot water readily available throughout the main hot water supply line, eliminating the need to purge the entire line before hot water is present at the 󶈵xture.

To fixture

Hot return

Hot

Hot water supply

To fixture

Hot water supply

Circ pump

Check valves

Cold

Cold supply to W/H

Viega PureFlow PEX can be used in recirculating domestic hot water plumbing loops, provided:

1. The plumbing loops shall operate with

water temperatures of 140°F or lower, as required by most model plumbing codes.

2. The recirculating loop is for supplying

hot water more quickly to the 󶈵xture.

3. The tubing is marked as rated

for “continuous recirculation” as evidenced by the ASTM F876 certi󶈵cation marking PEX 5306 (CL5).

Continuously Recirculating Hot Water Plumbing Loops

Circ

pump

Hot water supply

Check

valves

Hot

Cold

Cold water supply

Cold supply to W/H

Water heater

Cold water supply

Hot water supply

Hot return

If the ManaBloc must be mounted farther than 8 ft. from the hot water source, the ManaBloc may be supplied from a domestic hot water circulating loop using Viega PureFlow PEX tubing.

End cap

Water heater

Typical domestic hot water circulation piping

There are a number of hot water circulation systems available in the marketplace that o󶈴er a variety of options. These systems are ideal for branch-and-main or combination systems with spread-out 󶈵xture groups/ 󶈶oor plans, as well as for larger homes using multiple ManaBlocs in a paralleltype system.

PG-PF 724998 0320 PureFlow System

Page 50

Installing PureFlow Systems

Installing Viega PureFlow Fittings

Stub Out Options

The Viega PureFlow system includes 󶈵ttings to accommodate most plumbing needs. Stub outs are available for a variety of 󶈵xture situations, as well as 󶈵ttings and valves to connect to other plumbing materials and 󶈵xtures.

Copper Stub Out

Copper Straight

Stub Out

Standard stub outs with 90° bends and a closed end to facilitate pressure testing are available in either ⅜" or ½" PEX x ½" copper.

Also, PureFlow Press copper tub elbow and PureFlow Crimp shower valve adapters are available for easy connections to tub and shower valves.

Copper Tub Elbow

The exposed tubing can then be connected to a valve, using an optional chrome sleeve to cover the tubing if desired.

Drop-ear Elbow

Drop-ear Bend

Support

¼-Turn Straight Stop Valve PureFlow Press to ⅜" O.D. Riser

¼-Turn Straight Stop Valve PureFlow Crimp to ⅜" O.D. Riser

Shower

Valve Adapter

Drop-ear elbows provide a ½" or ¾" F NPT threaded connection at a wall or 󶈶oor penetration as well as a 󶈶ange for securing the 󶈵tting.

Drop-ear bend supports allow Viega PureFlow PEX tubing to be directly stubbed out of a wall. These supports allow the tubing to make the tight bend necessary to exit the wall at a 90° angle as well as providing a 󶈶ange for securing the support.

¼-Turn Angle Stop Valve PureFlow Press to ⅜" O.D. Riser

In-line Ball Valve (Press)

PG-PF 724998 0320 PureFlow System

¼-Turn Angle Stop Valve PureFlow Crimp to ⅜" O.D. Riser

In-line Ball Valve (Crimp)

Commercial Ball Valve

Page 51

Installing PureFlow Systems

PureFlow PEX Tubing Installed in Slab

Viega PureFlow PEX tubing can be installed within concrete slabs. Best practice dictates that only continuous lengths of tubing should be run within the slab. Viega does not recommend the installation of 󶈵ttings within a slab as part of a design. Fittings should only be used in a slab if it is necessary to make a repair. If the use of 󶈵ttings buried in concrete is necessary for repairs, all such 󶈵ttings must be wrapped with insulation, noncorrosive tape (no adhesives) or sleeved to prevent corrosion. The wrap shall be a self-fusing, formaldehyde-free, fully cured silicone tape with a minimum of 0.020" thickness. The wrap is available from Viega (part number 15320). Contact a Viega representative for additional information on approved wrapping materials.

When running tubing within a concrete slab, the tubing must be fastened to the reinforcing mesh or rebar every two to three feet to prevent it from 󶈶oating up while concrete is curing.

Sleeving Requirements

All penetration points of Viega PureFlow PEX tubing run within concrete slabs or walls (entry/exit points, expansion joints, etc.) must be sleeved to protect the tubing from expansion and contraction. Sleeving may consist of a larger piece of plastic tubing or open- or closed-cell insulation with a wall thickness no less than 0.022" thick.

Where sleeves are used, they shall be securely fastened to the assembly penetrated. Insulation and covering on or in the penetrating item shall not penetrate the assembly unless speci󶈵c material used has been tested as part of the assembly.

Tubing must be fastened to the reinforcing mesh on rebar with the use of plastic zip ties

Viega o󶈴ers corrugated sleeved PEX for additional underground or in-slab protection. This allows for easy removal and replacement if future issues arise.

PG-PF 724998 0320 PureFlow System

Viega PureFlow PEX tubing

Attach tubing to wire mesh

or rebar with zip ties

Wire mesh or rebar

4" to 6" cement slab

PEX in slab

Elbow sleeves protect tubing at concrete slab penetrations

Viega plastic bend support or corrugated tube

Page 52

Installing PureFlow Systems

Sealants

The space between corrugated sleeving and opening of a building envelope, wall, 󶈶oor, or ceiling assembly penetrated by a pipe shall be sealed in an approved manner with caulking material, foam sealant, or gasketing system tested in accordance with ASTM E814 or UL 1479.

Use of a silicone, acrylic, or siliconized acrylic caulk may be necessary to seal any voids between PEX tubing and the sleeving material. Most canned expanding foams and open- or closed-cell pipe insulation are also good sealing materials and may be used in direct contact with PEX tubing. DO NOT use oil-based caulks or closed-cell spray foams!

If the use of 󶈵ttings buried in concrete is necessary for repairs, all such 󶈵ttings must be wrapped with insulation, noncorrosive tape (no adhesives) or sleeved to prevent corrosion. The wrap shall be a self-fusing, formaldehyde-free, fully cured silicone tape with a minimum of 0.020" thickness. The wrap is available from Viega (part number

15320). Contact a Viega representative for additional information on approved wrapping materials.

Heat Tape

It is an acceptable practice to use heat tape on PEX tubing as long as it is a self-limiting type not controlled by an external thermostat. Below is a list of manufacturers that o󶈴er heat tapes meeting these requirements:

■ EasyHeat

■ Heaterzone.com

■ WRAP-ON / PIPE-GUARD

■ BriskHeat

/10800 series

™

Freeze Repair

The 󶈶exibility of Viega PureFlow PEX tubing makes it resistant to damage from freezing. PEX tubing systems should not be intentionally subjected to freezing.

However, if freezing occurs, there are several methods to thaw PEX tubing.

■ Hot water

■ Wet, hot towels

■ Hand-held hair dryer

■ Low-wattage electric heating tape (self

limiting)

■ A commercial system that pumps

heated water through a tube to the ice blockage and returns the cooled water for reheating

WARNING!

Heat must be applied directly to the frozen tubing section. Temperatures on tubing shall

not exceed 180°F.

WARNING!

Do not use open torch or excessive heat to thaw PEX tubing. Tubing failure or damage can result.

Condensation Control

As a general practice, anywhere metal piping requires insulation for condensation control, plastic piping will too. Always check code for necessary insulation requirements.

Installing PEX Under a Slab

When installing Viega PureFlow PEX or FostaPEX tubing in the ground under the slab, the tubing should be snaked from side to side in the prepared trench to provide for contraction due to temperature change. The trench bottom should be smooth and free of rocks and debris. Lay the tubing directly on the trench bottom. Tubing must be continuously supported by the trench bottom. Best practice dictates that only continuous runs of tubing should be placed under slabs. Viega does not recommend the installation of 󶈵ttings under a slab as part of a design. Any connections must be outside the slab or in an access box.

PG-PF 724998 0320 PureFlow System

Page 53

Installing PureFlow Systems

PEX tubing must be sleeved at all expansion joints and every point where it enters, exits, or penetrates the slab. For expansion joints that are to be cut, the tubing must be dipped the slab to prevent damage

Installing PEX under the slab

Installing PEX Below Grade as Service Line

Viega PureFlow PEX and FostaPEX tubing may both be used underground and for water service piping. When running lines underground, it is important to provide a stable, continuous trench base to support the tubing.

Always allow su󶈷cient slack when tubing is laid in trenches. Snake the tubing slightly side to side to provide for contraction due to temperature change.

Allow su󶈷cient slack when tubing is laid in trench

Do not use blocking to support tubing. PEX tubing can be damaged by contact with sharp objects. Ensure that the trench bottom and 󶈵ll do not contain sharp rocks or other items. In good soil conditions, tubing may be placed directly on trench bottom. In poor soil conditions (rocky, loose, etc.) the trench should be excavated at least six inches

below

below the tubing level and back󶈵lled with appropriate material to provide a stable base (coarse sand, pea gravel, or similar).

Back󶈵ll material must be free of large rocks, glass, or other sharp objects. Provide su󶈷cient coverage over tubing so that expected tra󶈷c loads will not deform tubing (consult local codes). Compact this material to at least 6" above the tube.

Trench in poor soil

Installing PEX below grade

Trench in good soil

Do not install Viega PureFlow PEX tubing where soil is or may become contaminated with solvents, fuels, or similar chemicals. Do not install tubing above or below septic tanks, leach 󶈵elds, pits, or cesspools.

Always follow local codes when installing Viega PureFlow PEX tubing. Consult standards such as ASTM D2774: Standard Recommended Practice for Underground Installation of Thermoplastic Pressure Piping for further information.

Trace Wire

It is an acceptable practice to use trace wire to assist with the detection of Viega underground piping systems. Refer to local code for minimum wire gauge and material requirements.

PG-PF 724998 0320 PureFlow System

Page 54

Pressure Testing PureFlow Systems

General

Upon completion of a Viega PureFlow plumbing system installation, a hydrostatic (potable water) pressure test shall be conducted. If potable water is not available, or the potential for freezing conditions exists, pneumatic* (air or nitrogen) testing and/or the use of an RV antifreeze** solution are also acceptable methods for pressure testing.

■ *Use air testing only if approved by

local code or the Authority Having Jurisdiction (AHJ).

■ **RV antifreeze shall be drained and

󶈶ushed from all portions of the plumbing system prior to consumer use.

Always refer to local plumbing code for pressure testing requirements and approved methods speci󶈵c to plastic plumbing systems. If none is speci󶈵ed, refer to the following table for acceptable methods, test pressures, and durations.

Testing Viega PureFlow Systems

(Branch and Main / ManaBloc)

Test

Min/Max

Method

Duration

Water

Air

CIRCUMSTANCES SHALL THE SYSTEM BE TESTED AT TEMPERATURES LOWER THAN 10˚F (-12˚C).

Max

Min

Pressure

(psi)

100 40 NA

100 40 8*

15 min/

1 hr

15 min/

1 hr

Pressure

WARNING!

WATER TESTING SHALL BE AVOIDED DURING FREEZING CONDITIONS. UNDER NO

Allowable

Variance

(psi)

ManaBloc Valve Information!

Opening a port valve to an empty or unpressurized

distribution line may cause valve damage.

To prevent potential valve damage or failure, open the port valves before 󶈵lling and pressurizing the lines. The force of water rushing to 󶈵ll an empty line can cause the valve’s seal to “clip o󶈴,” resulting in incomplete sealing or complete valve failure.

CARE must be exercised when opening a port valve to an empty or unpressurized line. The 󶈵xture to which the line is connected should be in the OFF position and the valve must be opened slowly until water starts to 󶈶ow into the line.

DO NOT CONTINUE to open the valve until the line is full and pressurized. Open the valve fully only after the line is up to system pressure. The 󶈵xture can then be opened to purge the line of air.

Valve stems are replaceable. Order part number 51602.

WARNING!

FOLLOW ANTIFREEZE MANUFACTURER’S

INSTRUCTIONS FOR CONCENTRATIONS. Use only nontoxic antifreeze approved for drinking water systems.

Note: If such a solution is used, the antifreeze solution must be su󶈷ciently concentrated to withstand the lowest temperature encountered while the testing 󶈶uid is in the system. Antifreeze solutions should be purged and the system 󶈶ushed with potable water prior to consumer use.

PG-PF 724998 0320 PureFlow System

Page 55

Pressure Testing PureFlow Systems

WARNING!

PRESSURES USED IN TESTING CAN BLOW

CONNECTIONS APART WITH TREMENDOUS FORCE!

This force is many times greater when air is used as a test medium. To reduce the risk of personal injury, ensure that all connections are completed before testing. Use only the pressure and time required to determine that the system is leak free.

* If the pressure in the system declines more than 8 psi during the 15-minute to one-hour period, repressurize the system to the original test pressure and retest. If the system pressure declines more than 8 psi again during the test period, test the distribution line test caps or any other 󶈵ttings in the system with the approved leak-detect solution.

Note: Some plumbing 󶈵xtures may not withstand test pressures greater than 80 psi. Consult 󶈵xture manufacturer’s instructions for pressure limitations or plug all distribution lines at the 󶈵xture end. The system shall, at a minimum, withstand the test pressure, without leaking, for a period of 15 minutes.

UNMADE OR INCOMPLETE

Air Testing

Air testing of a Viega PureFlow plumbing system shall use the following procedure provided to ensure safety

WARNING!

It is the responsibility of the installer to read and

understand the below pressure testing criteria and all safety precautions. Compressed air can store extremely high energy as compared to compressed water systems. Failure to follow these steps could result in personal injury, death, and/or property damage.

Preparing for Air Pressure Test

■ Notify other trades that air pressure

test will be conducted on the plumbing system. Only quali󶈵ed personnel should be present during system testing.

■ Use only compressed air or nitrogen that

is free of any kind of lubricating oils.

■ Do not conduct pressure testing

overnight or if a large temperature change is anticipated.

■ Before pressurizing the system,

conduct a visual inspection to ensure proper connections have been made throughout the plumbing system.

■ All personnel involved in the pressure

testing shall wear, at a minimum, eye and hearing protection. It is recommended the person applying the pressure to the system wear a full face shield.

■ Only Viega PureFlow plumbing system

components (tubing/󶈵ttings/manifolds) shall be pressure tested. All other system components (water heaters and 󶈵xtures) shall be isolated from the pressure test.

■ Contact the inspector and schedule

the pressure test.

Pressurizing the System

■ Verify no other trades are present prior

to starting the pressure test. Only quali󶈵ed testing personnel should be present during pressure test.

■ Introduce pressure into the system as

outlined in the stages below.

Stage 1: Gradually increase system pressure to 10 psi (over the course of approximately 30 seconds).

■ Wait for 10 minutes before inspecting

pressure gauge.

■ If pressure holds steady, continue to

Stage 2.

■ If pressure falls over the test period,

look for potential leaks with an approved leak-detect solution. Once system pressure is completely relieved and the leak is 󶈵xed, restart test procedure.

PG-PF 724998 0320 PureFlow System

Page 56

Pressure Testing PureFlow Systems

Stage 2: Gradually increase system

pressure to 50 psi (over the course of approximately 1 minute).

■ Wait for 10 minutes before inspecting

pressure gauge.

■ If pressure holds stable, continue to

Stage 3.

■ If pressure falls over the test period,

look for potential leaks with an approved leak-detect solution. Once system pressure is completely relieved and the leak is 󶈵xed, restart testing procedure from beginning.

Stage 3: Gradually increase system pressure to 100 psi (over the course of approximately 1 minute).

■ Inspect gauge pressure over next

10-minute period to verify pressure has not decreased more than the allowable variance noted in the table on the preceding page.

■ If pressure variance allowed is not

exceeded, the system test has passed.

■ If pressure decreases more than the

allowable variance, the test has failed. Apply approved leak-detect solution (see “Leak detection” below) on 󶈵tting and/or manifold connections to isolate the location of the leak. Once system pressure is completely relieved and the leak is 󶈵xed, start testing procedure from beginning.

Completing the Air Test

Depressurize system.

■ Use of the same safety equipment

applies to these steps.

■ Slowly bleed o󶈴 any remaining air

pressure from system (approximately 1-minute duration).

■ Notify other trades the test is complete

and the work area is safe to occupy.

■ Document the time and date the test was

completed and the pressure and duration of the test.

Leak Detection

Viega has identi󶈵ed the leak-detection solutions listed below as being compatible for use with Viega PureFlow Press system components. Consult leak-detect manufacturer for proper application and product instructions. To determine the compatibility of other leak-detection solutions not listed below, contact Viega Technical Services prior to their use.

■ megabubble

■ Oatey

■ Snoop Liquid Leak Detector

As an alternative leak detection, a mixture of Original Palmolive Green soap (#46100-46200) or Palmolive Ultra (#356140 or 46128) mixed with potable water at a ratio of two ounces of soap to one gallon of water (mix Ultra at a ratio of

1.5 ounces per gallon) may be used.

Note: If the solution does not show a leak on any of the caps or 󶈵ttings, isolate the ManaBloc by turning the valves to the “OFF” position, repressurize if needed and apply the same solution to the ManaBloc manifold components.

Leak Detector

All Purpose Leak Detector

™

dishwashing

™

PG-PF 724998 0320 PureFlow System

Page 57

System Disinfection

General

Local codes may require system disinfection. When no other method is available, follow the time limitations and exposure levels shown below.

1. Use a chlorine solution and one of the exposure durations listed below:

Concentration Period Authority

200 ppm 3 hours IPC/UPC

50 ppm 24 hours IPC/UPC

2. Mix the disinfection solution thoroughly before adding it to the system.

3. The chlorine solution must reach all parts of the system. Open all 󶈵xtures (both sides) and 󶈶ow water until a chlorine smell is present. As an alternative, chlorine test tablets can be used to detect chlorine at each 󶈵xture.

4. The chlorine source for the solution can be, but is not limited to, the following:

Chlorine

% Active

Source

Laundry

bleach

Form Amount per 100

Chlorine

5.25 Liquid 3 pints (48 oz.)

Gallons Water for a

200 ppm Solution

5. After the solution has been in the system for the time required by the Authority Having Jurisdiction (AHJ) or the exposure durations listed in Step 1, the system shall be 󶈶ushed completely with potable water.

6. The system must be purged or drained of all water or protected from freezing.

FAILURE TO FLUSH THE SYSTEM NOTICE!!

To prevent reduced service life of system components, disinfection solutions shall not be allowed to stand in the system longer than 24 hours. Thoroughly 󶈶ush the system with potable water after disinfection.

California Flushing Requirements

The State of California requires all installations of PEX piping, where it is the initial plumbing system installed in new construction, shall be 󶈶ushed twice over a period of at least one week. The piping system shall be 󶈵rst 󶈶ushed for at least 10 minutes and then 󶈵lled and allowed to stand for no less than one week, after which all the branches of the piping system must be 󶈶ushed long enough to fully empty the contained volume. This shall not apply to installations of PEX tubing where it replaces an existing tubing system of any material.

At the time of 󶈵ll, each 󶈵xture shall have a removable tag, shown below.

This new plumbing system was first filled and flushed on by

The State of California requires that the system be flushed after standing at least one week after the fill date specified above. If this system is used earlier than one week after the fill date, the water must be allowed to run for at least two minutes prior to use for human consumption.

This tag may not be removed prior to the completion of the required second flushing, except by the building owner or occupant.

(date)

(name)

PG-PF 724998 0320 PureFlow System

Page 58

Limited Warranty

The following warranty does not cover 󶈵re protection and motor home / RV applications. For warranty information on these and other applications, refer to applicable warranty.

Viega PureFlow Water System

Subject to the conditions and limitations in this Limited Warranty, VIEGA LLC (Viega) warrants to the owner of applicable real property in the United States (including its territories) and Canada that the components in its PureFlow Plumbing System (as described below) when properly installed by licensed plumbers in potable water systems, under normal conditions of use, shall be free from failure caused by manufacturing defects for a period of twenty-󶈵ve (25) years from date of installation.

The Viega PureFlow Plumbing System and components covered by this twenty-󶈵ve (25) year warranty are:

Viega PureFlow cross-linked polyethylene (PEX) tubing or PureFlow FostaPEX® tubing installed with PureFlow Press 󶈵ttings in metal or polymer and PureFlow Press sleeves sold by Viega installed as a system.

Viega PureFlow cross-linked polyethylene (PEX) tubing and ASTM F1807 metal crimp insert 󶈵ttings sold by Viega and ASTM F2159 PolyAlloy crimp 󶈵ttings sold by Viega installed with copper crimp rings as a system.

Viega warrants that ManaBloc®, MiniBloc or polymer or metallic manifolds, and their approved connections, sold by Viega and installed as a manifold plumbing system under normal conditions of use, shall be free from failure caused by manufacturing defects for a period of ten (10) years from date of installation.

Power tools and jaws used with PureFlow Press 󶈵ttings are warranted by the manufacturer and Viega extends no separate warranty on those tools or jaws. Viega warrants that PureFlow Press hand tools sold by Viega, under normal conditions of

use, shall be free from failure caused by manufacturing defects for a period of two (2) years from date of sale. Viega warrants that PureFlow Crimp hand tools and tubing cutters sold by Viega, under normal conditions of use, shall be free from failure caused by manufacturing defects for a period of twelve (12) months from date of sale.

Viega warrants that properly installed PureFlow valves, PureFlow lav and closet risers and riser accessories manufactured and/or sold by Viega shall be free from failure caused by manufacturing defects for a period of two (2) years from date of installation.

Viega does not extend any warranty on its components used in systems with tubing, 󶈵ttings, manifolds, or press sleeves not sold by Viega or installed by other than a licensed plumber. In addition, the warranty does not apply if distribution lines and their connections to manifold plumbing systems sold by Viega are not Viega Pure󶈶ow PEX or PureFlow FostaPEX tubing or approved connections sold by Viega.

Connection to non-Viega plumbing products intended for riser and/or water service applications does not void the system warranty provided all pipe, 󶈵ttings, valves and manifolds are sold by Viega after the transition location.

Termination connections to non-Viega end-use devices or equipment such as 󶈵ltration, water softeners, shower valves, faucets, stops and other such devices, when utilizing Viega PureFlow PEX and PureFlow FostaPEX does not void the system warranty as described.

Under this limited warranty, you only have a right to reimbursement if the failure or leak or resulting damage resulted from

PG-PF 724998 0320 PureFlow System

Page 59

Limited Warranty

a manufacturing defect in the products covered by this warranty and the failure or leak or resulting damage occurred during the warranty period. You do not have a remedy or right of reimbursement under this warranty and the warranty does not apply if the failure or leak or resulting damage is caused by (1) components in the plumbing system other than those manufactured or sold by Viega; (2) not designing, installing, inspecting, testing, or operating the system in accordance with Viega’s installation instructions at the time of the installation, applicable code requirements and good plumbing practices; (3) improper handling and protection of the product prior to and during installation, exposure to ultra violet light, inadequate freeze protection, exposure to water pressures or temperatures in excess of the limitations on the tubing or application of unauthorized or harmful solvents or chemicals; (4) chemically corrosive or aggressive water conditions; or (5) acts of nature such as earthquakes, 󶈵re, 󶈶ood or lightning.

In the event of a failure or leak in the system, it is the responsibility of the property owner to obtain and pay for repairs. Only if the warranty applies will Viega be responsible for reimbursement under this warranty. The part or parts which you claim failed should be kept and Viega contacted at the address below or by telephoning 800-9769819 within thirty (30) days after the failure or leak and identifying yourself as having a warranty claim. You should be prepared to ship, at your expense, the product which you claim failed due to a manufacturing defect, document the date of installation, and the amount of any claimed bills for which you seek reimbursement. Within a reasonable time after receiving the product, Viega will investigate the reasons for the failure, which includes the right to inspect the product at Viega and reasonable access to the site of damage in order to determine whether the warranty applies. Viega will notify you of the results of this review.

In the event that Viega determines that the failure or leak and any resulting damages were the result of a manufacturing defect

PG-PF 724998 0320 PureFlow System

in the products covered by the 10-year or 25-year limited warranties and occurred during the 󶈵rst ten (10) years covered by this warranty, Viega will reimburse the property owner for reasonable repair or replacement charges to include drywall, 󶈶ooring and painting costs, as well as damages to personal property, resulting from the failure or leak. The remaining 15-year limited warranty for products covered by the 25-year limited warranty will cover material costs for pipe and 󶈵ttings only, sold by Viega, not inclusive of any labor or installation costs. Any change in property ownership after the 󶈵rst ten years will nullify any remaining warranty coverage.

VIEGA SHALL NOT BE LIABLE FOR CONSEQUENTIAL ECONOMIC LOSS DAMAGES UNDER ANY LEGAL THEORY AND WHETHER ASSERTED BY DIRECT ACTION, FOR CONTRIBUTION OR INDEMNITY OR OTHERWISE.

THE ABOVE LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IF FOUND APPLICABLE, ANY IMPLIED WARRANTIES ARE LIMITED TO THE DURATION OF THE TIME LIMITS SET OUT IN THIS WRITTEN WARRANTY. Other than this limited warranty, Viega does not authorize any person or 󶈵rm to create for it any other obligation or liability in connection with its products. This written warranty applies for the 󶈵rst 10 years of the applicable warranty regardless of any change of ownership in the property.

Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on the duration of implied warranties in certain types of transactions, so the above exclusion or limitations may not apply to you. This limited warranty gives you speci󶈵c legal rights and you also may have other rights which vary from state to state. This warranty shall be interpreted and applied under the law of the state in which the product is installed.

Page 60

Viega LLC

585 Interlocken Blvd Broomfield, CO 80021

Ph: 800-976-9819 Fax: 800-976-9817 www.viega.us

PG-PF 724998 0320 PureFlow System