3
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
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