Viega MegaPress XL Installation Manual
Viega MegaPress XL System
Installation Manual
The global leader
in plumbing, heating
and pipe joining systems
Heritage of quality, vision for the future
Viega’s heritage of superiority demands nothing but
the best for our customers. Engineered to be efficient,
Viega products perform at the highest possible level,
providing confidence and peace of mind. Viega is the
only manufacturer to offer press systems in multiple
pipe joining materials. More than one million Viega
press fittings 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.
Introducing the Viega MegaPress XL system
We all want the advantage in our favor. That extra
inch. That “secret weapon.” A competitive edge that
is so far superior, it’s almost unfair. For pipefitters
specializing in carbon steel, that unfair advantage is
finally here with MegaPress XL. Gain the edge today
with the newly innovated, meticulously engineered,
revolutionary press fitting system designed for
2½" – 4" diameter pipe. Only MegaPress XL makes
installation faster, provides more control at less cost,
and gives pipefitters the smart, reliable connection
they need to stay ahead. Simply put, if MegaPress
XL isn’t part of your toolbox, you’re putting yourself
behind.
Do more with Viega
Viega press technology is consistent and reliable,
providing the same quality pipe connections every
time. Viega press systems make secure connections
in less than seven seconds, which helps keep a
project on time or ahead of schedule. The Viega
MegaPress XL system helps installers accomplish
more in the same amount of time.
A true innovator since 1899, Viega is at the forefront
of pipe joining technology. With personalized support,
efficient delivery processes and trustworthy quality,
no other manufacturer can provide the same level of
service. The global leader in plumbing, heating and
pipe joining systems, Viega is the name you can trust.
IMPORTANT NOTE:
A WHITE DOT ON A VIEGA MEGAPRESS XL FITTING
INDICATES THE SMART CONNECT TECHNOLOGY
WITH AN FKM SEALING ELEMENT. FOR A CURRENT
LIST OF APPLICATIONS, PLEASE VISIT WWW.VIEGA.
US/APPLICATIONS.
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.
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IM-MP 599345 0718 MegaPress XL (EN)
Contents
1 System Description
1.1 Viega MegaPress XL ............................................................4
1.1.1 Approvals and certications ..................................................4
1.1.2 Codes ...................................................................4
1.1.3 Operating parameters ......................................................4
1.2 Fitting description ..............................................................4
1.2.2 Testing ..................................................................5
1.2.3 Sealing element ...........................................................5
1.2.4 Fitting markings ...........................................................5
1.3 Applications ...................................................................5
2 Tools
2.1 Tools ........................................................................7
2.2 Pressing tools .................................................................7
3 General Installation Instructions
3.1 Pipe selection .................................................................8
3.2 Handling instructions ............................................................8
3.3 Pipe preparation ...............................................................8
3.3.1 No-stop couplings .........................................................8
3.4 Pressing requirements ...........................................................9
3.4.1 Minimum distance between ttings ............................................9
3.4.2 Minimum space requirements for the press tting process in front of and behind
components ..............................................................9
3.4.3 Pressing with ring and actuator in tight quarters ..................................9
3.5 Welding requirements ..........................................................10
3.5.1 Welding adjacent to Viega MegaPress XL ttings ................................10
3.5.2 Welding in line with Viega MegaPress XL ttings .................................10
3.6 General installation requirements .................................................10
3.6.1 Expansion ...............................................................10
3.6.2 Electrical bonding .........................................................10
3.6.3 Piping exposed to freezing temperatures ......................................10
3.6.4 Corrosion protection ......................................................10
3.6.5 Underground installations ..................................................10
3.6.6 Pressure testing ..........................................................10
3.6.7 Transition connections .....................................................10
3.6.8 Pipe hangers ............................................................11
3.7 Deection ....................................................................11
3.8 Identication .................................................................11
3.9 Viega MegaPress XL tting system installation .......................................12
4 Warranty
Viega MegaPress Limited Warranty ...................................................14
Viega Limited Warranty for Industrial Applications .......................................15
IM-MP 599345 0718 MegaPress XL (EN)
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1 System Description
The Viega MegaPress XL fitting system is a stateof-the-art IPS press fitting system that provides
an economical and reliable installation of schedule
5 to schedule 40 ASTM A53, A106, A135 and
A795 steel pipes. Viega MegaPress XL fittings
are available in sizes ranging from 2½" to 4" and
provide a fast, reliable, consistent joining method.
Our products are the result of decades of
experience in manufacturing press fittings. The
Viega MegaPress XL fitting system is offered in
configurations that allow for the installation of the
vast majority of black iron piping applications in the
residential, commercial and industrial markets.
The Viega MegaPress XL fitting system requires
no threading or welding and poses no fire hazard,
which is particularly important in restoration or
retrofit work. The press fittings are installed with a
battery-powered or corded pressing tool.
The advantages of installing Viega MegaPress XL
fitting system include:
• Most labor savings
• Lower overall installed cost
• Proven joining technology
• Technical eld support
• Drastically reduces installation time
• No special certication required
1.1 Viega MegaPress XL
Viega MegaPress XL 2½" to 4" fittings feature an
FKM sealing element suitable for the following
applications:
• Hydronic Heating
• Chilled Water
• Compressed Air
• Low-Pressure Steam
• Fire Sprinkler Systems
• Fuel and Lube Oil
For more information, see Table 1.1 Approved
Applications on Page 6.
1.1.1 Approvals and certifications
• IAPMO PS 117
• ICC LC1002
• TSSA
• FM Class 1920
• CRN #0A14541.6
• UL 213
1.1.2 Codes
• ASME B31, 31.1, 31.3, 31.9
• ICC International Plumbing Code
• ICC International Mechanical Code
• IAPMO Uniform Plumbing Code
• IAPMO Uniform Mechanical Code
• PHCC National standard plumbing code
• NFPA 13, 13D and 13R
1.1.3 Operating parameters
Operating temperatures: 14°F to 284°F, can handle
temperature spikes up to 356°F
Operating pressure: 200 psi max.
Note: All systems must be installed per local code
requirements.
1.2 Fitting description
Viega MegaPress XL fittings are constructed of
carbon steel with a corrosion-resistant zinc/nickel
coating.
Viega MegaPress XL fittings contain a stainless
steel grip ring and PBT separator ring as shown in
Figure 1.1. The grip ring is a 420 stainless steel ring
with teeth that grip the pipe and ensure that the
fitting is locked securely to the piping.
The PBT separator ring ensures that the sealing
element and grip ring perform at maximum
capacity by providing a positive physical
separation.
PressBooster with built-in actuator and rings are
available for various dimensions. Their constant
compression produces a positive, nondetachable,
mechanical joint.
PBT
Sealing
Element
Separator Ring
1.2.1 Viega Smart Connect technology
Viega MegaPress XL system sizes 2½" to 4"
incorporate the Viega Smart Connect technology,
which assures a path for liquids and/or gases to
escape from inside the system past the sealing
element of an unpressed connection. The function
of this technology is to provide the installer quick
and easy identification of connections that have
not been pressed prior to putting the system into
operation.
Press systems without the Viega Smart Connect
technology may not leak initially; however, they
may unseat during future system operation. The
Viega Smart Connect technology is designed to
protect from this potential risk. See Figure 1.2.
The Viega Smart Connect technology is a quick
and easy way for installers to identify connections
that need to be pressed. Testing for leaks using
the Viega Smart Connect technology is not a
replacement for testing to the requirements of local
codes or standards.
Stainless Steel
Grip Ring
Figure 1.1
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IM-MP 599345 0718 MegaPress XL (EN)
1.2.2 Testing
All system testing shall be carried out in
accordance with the local code or authority having
jurisdiction. Viega recommends air testing of gas
systems to be a minimum of ½ psi.
1.2.3 Sealing element
The Viega MegaPress XL system is available with
the following factory-installed sealing element:
Viega MegaPress XL FKM Sealing Element
Operating temperature: 14°F to 284°F (-10°C to
140°C)
FKM is well known for its excellent resistance
to petroleum products and solvents as well as
exceptional high-temperature performance.
The FKM sealing element is a special-purpose
elastomer typically installed where higher
temperatures are required.
FKM, a fluoroelastomer, is dull black in color. It
possesses excellent resistance to aging, ozone,
sunlight, weathering, environmental influences,
oils and petroleum-based additives. Its superb
resistance to high temperatures and petroleumbased additives makes it ideal for seals and
gaskets in solar, district heating, low-pressure
steam and compressed air system fittings. It can
withstand heat spikes up to 356°F.
Note: All sealing elements are installed using an
H-1 food grade silicone oil lubricant registered with
NSF, USDA and approved for use under FDA 21
CFR.
Note: Refer to product line application guides or
chemical compatibility matrix for general information,
or call Viega Tech Services at 1-877-843-4262.
1.2.4 Fitting markings
Markings on Viega MegaPress XL fittings include:
• White Dot: FKM sealing element and Smart
Connect technology
• S58
• UMC
• Size of tting
• Manufacturer name
• Manufacturer date code
1.3 Applications
Listed below are common applications approved
by Viega for Viega MegaPress XL fitting systems.
See Table 1.1.
1 Identify an unpressed connection during
pressure testing when water flows past the
sealing element.
2 Upon identification, use the Viega MegaPress
XL tool to press the fitting, making a reliable
leak-proof connection.
IM-MP 599345 0718 MegaPress XL (EN)
Viega
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MegaPress XL connections are fast,
flameless and reliable.
Figure 1.2 Smart Connect technology
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