System Tested and Certified by NSF International
against NSF/ANSI Standard 42, 58, and CSA B483.1
for the reduction of the claims specified on the
Performance Data Sheet.
C US
IMPORTANT:
Read this performance data and compare the capabilities of
this system with your actual water treatment needs.
It is recommended that before installing a water treatment
system, you have your water supply tested to determine your
actual water treatment needs.
This system has been tested according to NSF/ANSI 58 for the
reduction of substances listed below. The concentration of the
indicated substances in water enteringthe sysem was reduced
to a concentration less than or equal to the permissible limit
for water leaving the system as specified in NSF/ANSI 58.
The GRO-350BP shall only be used for arsenic reduction on
chlorinated water supplies containing detectable residual free
chlorine at the system inlet. Water systems using an in-line
chlorinator should provide a one-minute chlorine contact time
before the RO system.
Do not use with water that is microbiologically
unsafe or of unknown quality without adequate disinfection
before or after the system. Systems certified for cyst reduction
may be used on disinfected waters that may contain filterable
cysts.
NOTE: Substances reduced are not necessarily in your water.
Filter must be maintained according to manufacturer’s
instructions, including replacement of filter cartridges.
The tested efficiency rating for these systems is 54.90%.
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
typical daily usage.
The tested recovery rating is 57.50%. 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.
The GRO-350BP has been tested for the treatment of water
containing pentavalent arsenic [also known as As(V), As(+5),
or arsenate] at concentrations of 0.050 mg/L or less. This
system reduces pentavalent arsenic, but may not remove
other forms of arsenic. This system is to be used on water
supplies containing a detectable free chlorine residual or on
water supplies that have been demonstrated to contain only
pentavalent arsenic. Treatment with chloramine (combined
chlorine) is not sufficient to ensure complete conversion
of trivalent arsenic to pentavalent arsenic. Please see the
Arsenic Facts section of the Performance Data Sheet for
further information.
Model GRO-350BP
Substance
Influent Challenge
Concentration
Max Permissible
Product Water
Concentration
Reduction
Requirements
Average
Reduction
Standard 42
Chlorine
Taste and Order
2.0 mg/L ± 10% ≥50% 95.9%
Standard 58
Total Dissolved Solids 750 ± 40 mg/L 187 mg/L 97.8%
Pentavalent Arsenic 0.050 mg/L ± 10% 0.010 mg/L 88.0%
Fluoride 8.0 mg/L ± 10% 1.5 mg/L 93.6%
Cysts* Minimum 50,000/mL 99.95% >99.99%
Turbidity 11 mg/L ± 1 NTU 0.5 NTU >99.1%
Lead 0.15 mg/L ± 10% 0.010 mg/L 98.6%
Selenium 0.10 mg/L ± 10% 0.05 mg/L 97.9%
Copper 3.0 mg/L ± 10% 1.3 mg/L 98.5%
Cadmium 0.03 mg/L ± 10% 0.005 mg/L 99.1%
Hexavalant Chromium 0.3 mg/L ± 10% 0.1 mg/L 96.4%
Trivalent Chromium 0.3 mg/L ± 10% 0.1 mg/L 98.2%
Radium 226/228 25 pCi/L ± 10% 5 pCi/L 80.0%
Barium 10.0 mg/L ± 10% 2.0 mg/L 96.3%
*NSF/ANSI Standard 58 certified to reduce cysts such as Cryptosporidium and Giardia by mechanical
means.
GRO-350BP SYSTEM INSTALLED WITH
FDF1-RC, GRO50-RC, F1GC-RC FILTER
CARTRIDGES
PERFORMANCE DATA
EPA # 082989-CHN-001
System Production Rate: 99.08 gpd (375.1 Lpd)
Recovery Rating: 57.50%
Efficiency Rating: 54.90%
TDS Rejection: 97.8%
Arsenic Fact Sheet
Arsenic (abbreviated As) is found naturally in some well
water. Arsenic in water has no color, taste or odor. It must
be measured by a lab test. Public water utilities must have
their water tested for arsenic. You can get the results from
your water utility. If you have your own well, you can have
the water tested. The local health department or state
environmental health agency can provide a list of certified
labs. There are two forms of arsenic: pentavalent arsenic [also
called As(V), As(+5), and arsenate] and trivalent arsenic [also
called As(III), As(+3) and arsenite]. In well water, arsenic may
be pentavalent, trivalent, or a combination of both. Special
sampling procedures are needed for a lab to determine what
type and how much of each type of arsenic is in the water.
Check with the labs in your area to see if they can provide
this type of service. Reverse osmosis (RO) water treatment
systems do not remove trivalent arsenic from water very well.
RO systems are very effective at removing pentavalent arsenic.
A free chlorine residual will rapidly convert trivalent arsenic
to pentavalent arsenic. Other water treatment chemicals
such as ozone and potassium permanganate will also
change trivalent arsenic to pentavalent arsenic. A combined
chlorine residual (also called chloramine) may not convert
all the trivalent arsenic. If you get your water from a public
water utility, contact the utility to find out if free chlorine or
combined chlorine is used in the water system. The GRO-
350BP system is designed to remove pentavalent arsenic.
It will not convert trivalent arsenic to pentavalent arsenic.
The system was tested in a lab. Under those conditions, the
system reduced 0.050 mg/L (ppm) pentavalent arsenic to
0.010 mg/L (ppm)(the USEPA standard for drinking water) or
less. The performance of the system may be different at your
installation. Have the treated water tested for arsenic to check
if the system is working properly. The RO component of the
GRO-350BP system must be replaced every 12-24 months
to ensure the system will continue to remove pentavalent
arsenic. The component identification and locations where
you can purchase the component are listed in the installation/
operation manual.
This reverse osmosis system contains a replaceable
component critical to the efficiency of the system.
Replacement of the reverse osmosis component should
be with one of identical specifications, as defined by the
manufacturer, to ensure the same efficiency and contaminant
reduction performance.
FRESHPOINT GRO-350BP Installation and Operation Manual • 15