Watts OF1665-75 User Manual

For Commercial and Industrial Applications

ES-OF1465_1665

Job Name

Job Location

Engineer

Approval

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LEAD FREE

*

Contractor

Approval

Contractor’s P.O. No.

Representative

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Models OF1465-50 and OF1665-75

OneFlow® Anti-Scale System

Connection Sizes: 2" (50mm)

Flow Rates: From 30 gpm to 450 gpm (114 lpm to 1703 lpm)

The OneFlow
scale formation on internal and external plumbing surfaces.
The OneFlow
to a building to treat both hot* and cold water, or it can be
located directly before a water heater, boiler, or other hot
water-using device that requires protection from the ill effects
of hard water.

OneFlow
ness minerals into harmless, inactive microscopic crystal
particles, as water travels through the media filled tank. These
precipitated micro-crystals stay suspended in the water and
are passed to drain, thereby having a greatly reduced ability
to react negatively like dissolved hardness does. The system
requires very little maintenance, no backwashing, no salt, and
no electricity. Typical hardness problems, especially build-up
of scale in pipes, water heaters, boilers and on fixtures are no
longer a concern.

OneFlow
anti-scalants or sequestrants). It is a scale prevention device
with proven third party laboratory test data and years of suc­cessful residential and commercial applications. OneFlow
the one water treatment device that effectively provides scale
protection and is a great alternative to water softening (ion
exchange) or scale sequestering chemicals.

®

Anti-Scale System provides protection from

®

system may be installed at the point-of-entry

®

prevents scale by transforming dissolved hard-

®

is not a water softener or a chemical additive (like

®

is

Features

• Chemical-free scale prevention and protection – converts

hardness minerals to harmless, inactive microscopic crystals
making OneFlow
softener for the prevention of scale due to water hardness

• Virtually maintenance free – No salt bags or other chemicals

to constantly add

• No control valve, no electricity and no wastewater

• Uses environmentally friendly “green” technology

• Improves efficiency of all water using appliances – both hot**

and cold

• Simple sizing & installation – all you need to know is pipe size

and the peak flow rate

• Perfect system for towns or communities where water soften­ers are banned or restricted

** For hot water applications where water temperature is 110°F

– 150°F (43° – 66°C), please consult ES-OneFlow-HotWater

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with­out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

®

an effective alternative technology to a water

• Manifold assemblies for easy installation of multi-tank, high-

flow applications (Can be operated in parallel for high flow
applications.)

• OneFlow

water supply

• OneFlow

sis (OneFlow
point-of-use system is being used down stream.)

* The wetted surface of this product contacted by consumable

water contains less than 0.25% of lead by weight.

®

does not remove minerals or add sodium to the

®

can be installed as pre-treatment to reverse osmo-

®

should be the last stage in treatment unless a

OF1665-75

Models

Model Maximum Flow Rate

OF1465-50 50 gpm (189.3 lpm)
OF1665-75 75 gpm (283.9 lpm)

Connections

Inlet Connection 2" (50mm) PVC Union with 90° Socket
Outlet Connection 2" (50mm) PVC Socket

Replacement Media

OF1465RM Media should be replaced every 3 years
OF1665RM Media should be replaced every 3 years

Specifications

A OneFlow® scale prevention system shall be installed on the
main water service pipe just after it enters the building, but after
other whole building water safety devices (backflow preventers
or pressure reducing valves), to effectively address water hard­ness concerns. A system may also be installed further down­stream to protect specific equipment or areas within a plumbing
system. The system shall be plumbed with a bypass valve to
allow isolation of tank(s) and to allow the bypass of untreated
water in the event that service or media replacement be nec-

essary. The installation area should be suitable in size for the

tank(s) to be serviced without encumbrance and sit upright on
a flat level surface.

The system must operate in an upflow manner and not require
additional water to backwash, flush, or regenerate once put into
service. The system must not require any chemical additives
and must not require electricity for operation.

Multi-tank systems shall be installed in parallel with PVC/CPVC

manifold to meet peak flow rate requirements.

NOTICE

Copper lines need to be passivized for a minimum of 4 weeks

before placing unit into service. Not for use on closed loop sys­tems.

Feed Water Chemistry Requirements

pH 6.5 to 8.5
Hardness (maximum) 75 grains (1300 ppm CaCO3)
Water Pressure 15psi to 100psi (103 kPa to 6.9 bar)
Temperature 40°F to 110°F (5°C to 43°C)
Chlorine < 3ppm

Iron (maximum) 0.3 mg/l
Manganese (maximum) 0.05 mg/l

Copper None allowed

Oil & H2S None allowed

Polyphosphate None allowed
Silica (maximum) 10 ppm

NOTICE

Water known to have heavy loads of dirt and debris
may require pre-filtration prior to OneFlow.

Standards

Independent scientific testing has confirmed Template Assisted

Crystallization (TAC) technology provides scale reduction of over
95+%. Testing was conducted under protocol based on DVGW

W512 test to access control of scale formation.

Peak Flow Rates - Weights

OF1465 OF1665

Dry Weight 54 lbs. 31.8 kgs. 88 lbs. 30.8 kgs.

Service Weight 350 lbs. 158.8 kgs. 420 lbs. 190.6 kgs.

Maximum Flow Rate***

Models gpm lpm

OF1465-50 50 189.3
OF1665-75 75 283.9

*** Exceeding maximum flow can reduce effectiveness and void warranty.

< 5 psi pressure drop @ Maximum Flow Rate

NOTICE

The information above shows flow rate data for our large

single tanks (50gpm & 75gpm), high-flow applications with
OneFlow utilize multiple tanks, plumbed in parallel, to meet

flow rates from 100 gpm up to and above 1000gpm or
more. An example of a multi-tank OneFlow system is shown
below:

Outlet

WQA Certied
against NSF/ANSI
Standard 61 and 372
for Lead Free.

C D

B

Dimensions

Model Dimensions

A B C D E

in. mm in. mm in. mm in. mm in. mm

OF1465-50 17 432 14 356 79 2006 65 1651 10
OF1665-75 17 432 16 406 79 2006 65 1651 10

The overall height and the height of the inlet fitting varies due to material variations and assembly
tolerances. Please allow additional clearance above the tank for making connections.

A Watts Water Technologies Company

ES-OF1465_1665 1320 © 2013 Watts

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USA: Tel: [phone] • www.watts.com

Canada: Tel: [phone] • www.watts.ca