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Equipment Specifications

Watts OneFlow

®

 systems are complete, self-contained, loaded 

with media and ready to use. A simple inlet and outlet connec-

tion is all that is required for installation. Please review operat-

ing pressures, temperatures and water chemistry limitations to 

ensure compatibility and performance.

**Copper

Pursuant to the EPA drinking water standards, the copper con-

centration permitted is up to 1.3 ppm. Typically originating from 

new copper plumbing, high levels of copper can foul OneFlow 

media. For applications with copper concentration greater than 

1.3 ppm, please contact Watts Pure Water Technical Service at 

1-800-224-1299. To further minimize any problem with excess 

copper, avoid applying excessive flux on the inner surfaces 

of the pipe and use a low-corrosivity water soluble flux listed 

under the ASTM B813 standard.

NOTICE

***Silica

OneFlow

®

 media does not reduce silica scaling. While silica tends 

to have a less significant effect on scale formation than other 

minerals, it can act as a binder that makes water spots and scale 

residue outside the plumbing system difficult to remove. This 20 

ppm limitation is for aesthetic purposes.

a

b

c

Mechanical Specifications

Model

835

935

1035

Max Service Flow 
(gpm)

8

12

16

Dry Weight (lbs)

19

23

25

 

 

 
 
 

a

40

40

40

b

37

37

37

c

12

12.5

13

Using OneFlow

®

 with other water treatment 

chemicals

The addition of soaps, chemicals, or cleaners, before or after 

OneFlow treatment, may reverse its anti-scale treatment effects 

and/or create water with a heavy residue or spotting potential. 

Any adverse conditions caused by the addition of soaps, chemi-

cals, or cleaners are the sole responsibility of the end user.

Figure 2.

pH

6.5-8.5

Hardness (maximum)

25 grains (427 ppm CaCO3)

Water Pressure

15 psi to 100 psi (1.03 bar to 6.9 bar)

Temperature

40° F to 100° F (5°C to 38°C)

Free Chlorine

<2 ppm

Iron (maximum)

0.3 ppm

Manganese (maximum)

0.05 ppm

Copper

1.3 ppm*

Oil & H2S

Must be Removed Prior to OneFlow

Silca (maximum)

20 ppm**

*  

See note about iron, manganese and copper on the next 

page.

**  These systems prevent hardness related scale formation inside 

the plumbing system of the home at influent hardness levels of 

25 grains per gallon of calcium carbonate and less. Due to vari-

ances in water chemistry certain aesthetic conditions external 

of the plumbing system may not be attained.

WARNING

!

NOTICE

   

Pressure drop at peak flow rate is less than 5 psi.
Pressure drop reading taken with inlet and outlet gauges installed 

at a common elevation and 80 degree feed water.

Dimensions

 (nominal - inches) 

Feed Water Chemistry Requirements

Summary of Contents for OneFlow OFRES-0835

Page 1: ...ply pipe before the water heater Do not expose the system to freezing temperatures Water freez ing in the system causes equipment damage Do not install in direct sunlight Ultraviolet rays from the sun may cause damage IOM OFRES OFRES If you are unsure about installing your Watts OneFlow system contact a Watts representative or consult a professional plumber You are required to thoroughly read all ...

Page 2: ...n hookup Compatible with all on site and community wastewater treatment systems Not subject to water softener restrictions and bans Tank Head Media Tank System Overview CK V3006 Bypass Assy EDP 0002167 Bypass Valve and Connection Fittings Setup Unpack and check the system components for damage or miss ing parts Installation Considerations Consider the following points when determining where to ins...

Page 3: ...pecifications Model 835 935 1035 Max Service Flow gpm 8 12 16 Dry Weight lbs 19 23 25 a 40 40 40 b 37 37 37 c 12 12 5 13 Using OneFlow with other water treatment chemicals The addition of soaps chemicals or cleaners before or after OneFlow treatment may reverse its anti scale treatment effects and or create water with a heavy residue or spotting potential Any adverse conditions caused by the addit...

Page 4: ...Because the OneFlow system operates in the UP flow mode the tank connections are opposite of traditional instal lations Please follow water flow diagram illustrated in Figure 3 Please see the Important note about iron manganese and copper in the water supply section Please see the note about Using OneFlow with other water treatment equipment on the previous page This system is designed for residen...

Page 5: ...ply valve when a steady stream of water comes out of the outlet port If the outlet is flowing into a bucket water could splash on nearby objects If this threatens the safety value structure or appearance of these objects protect remove them or use the outlet hose to drain option 9 Close the inside faucet 10 Connect the outlet of the OneFlow system to the cold water supply to the house 11 Open the ...

Page 6: ...er volume and specific water chemistry If you notice a change in performance after a three year period and feel the media should be replaced contact your system installer professional plumber or water treatment expert to perform a re bed service The color of the media should be noted any time it is replaced to ensure the media has not be come fouled If it has additional pretreatment for the system...

Page 7: ...7 ...

Page 8: ...rom date of original installation Such replacement media will be delivered to the owner F O B nearest factory at no cost excluding freight and local labor charges if any Damage to the media due to chlorine other oxidizers or fouling caused by local water conditions or any other operation outside of the limits shown under Specifications is not covered by this warranty THE WARRANTY SET FORTH HEREIN ...

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