Brita Redi-Twist USS-335, Installation Instructions Manual

21

Version 2.1I

USS-335 installation instructions

SPECIFICATIONS - QUALIFIED SYSTEM PERFORMANCE

1

 Industry standards measure RO 

Membranes performance with no 

back pressure on the product water, 

at 60 psig (414kPa) and 77°F (25°C). 

Further conditions on the above 

are 250 ppm TDS and a 30.6% 

recovery rate. Production rate and 

TDS reduction figures are for a new 

Membrane that has been rinsed for 

24 hours. The production rate of a 

new Membrane can decrease by 10% 

per year or more, depending upon the 

scaling and fouling tendencies of the 

Feed Water.

2

 Measured at 50 psi, 77° ± 2°F, 

and 717 mg/l TDS per NSF/ANSI 

Standard 58.

3

 Efficiency rating means the percentage of the influent water to the system that is available to the user as 

reverse osmosis treated water. Under operating conditions that approximate daily usage.

4

 Recovery rating means the percentage of the influent water to the membrane portion of the system that is 

available to the user as reverse osmosis treated water when the system is operated without a storage tank 

or when the storage tank is bypassed.

Non-potable Water Sources:

 Do not attempt to use this product to make safe drinking water from non-

potable water sources. Do not use the system on microbiologically unsafe water, or water of unknown 

quality without adequate disinfection before or after the system. This system is certified for cyst reduction 

and may be used on disinfected water that may contain filterable cysts.

Arsenic Reduction:

 This system shall only be used for arsenic reduction on chlorinated water supplies 

containing detectable residual free chlorine at the system inlet. Water systems using an inline chlorinator 

should provide a one minute chlorine contact time before the reverse osmosis system.

Nitrate/Nitrite Test Kit:

 This system is acceptable for treatment of influent concentrations of no more 

than 27 mg/L nitrate and 3 mg/L nitrite in combination measured as N. It is certified for nitrate/nitrite 

reduction only for water supplies with a pressure of 280 kPa (40psig) or greater. This sytem is supplied 

with a nitrate/nitrite test kit. Product water should be monitored periodically according to the instructions 

provided with the test kit.

Total Dissolved Solids:

 The Reverse Osmosis System contains a replaceable membrane cartridge critical 

for the effective reduction of total dissolved solids (TDS).

Replacement of the reverse osmosis membrane cartridge:

 The reverse osmosis system contains a 

replaceable membrane cartridge critical to the efficiency of the system.This membrane should be replaced 

every 12 months, or more often based on your local water. Only replace the reverse osmosis membrane 

with a part approved for use in your Brita

®

 Reverse Osmosis system.

Installations in The Commonwealth of Massachusetts:

 The Commonwealth of Massachusetts requires 

installation be performed by a licensed plumber and do not permit the use of saddle valves. Plumbing code 

248-CMR of the Commonwealth of Massachusetts must be followed in these cases.

 Specifications

Membrane Production

1

Membrane TDS Reduction

1

System Production

2

TDS Reduction

2

Maximum TDS
Maximum Water Hardness @ 6.9pH
Maximum Chlorine in Water
Supply Water pH Limits
Drain (reject water) Flow
Empty Storage Tank Precharge
Storage Tank Capacity

2

Supply Water Pressure Limits
Supply Water Temperature Limit
Efficiency

3

Recovery

4

35 ± 7 gpd
96.6% minimum
19.4 gpd
97.5%+ typical
2000 ppm
10 gpd
3.0 ppm
4-10
3-5 x product flow
5-7 psi
2.8 gallons/1.7 water
40-100 psi
40-100° F
19%
30.6%

(106-159 lpd)
96.6% minimum
73.4 lpd
97.5%+ typical
2000 ppm
2.64 gpL
3.0 ppm
4-10
3-5 x product flow
35-48 kPa air
10.6 liters/6.4 water
280-689 kPa
5-40°C
19%
30.6%

                   U.S.  

       METRIC