System Tested and Certified by NSF International
against NSF/ANSI Standard 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 entering the system
was reduced to a concentration less than or equal to the
permissible limit for water leaving the system as specified in
NSF/ANSI 58.
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 15.39%.
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 31.76%. 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.
Model GRO-2550
Substance
Influent Challenge
Concentration
Max Permissible
Product Water
Concentration
Reduction
Requirements
Average
Reduction
Standard 58
Total Dissolved Solids 750 ± 40 mg/L 187 mg/L 96.8%
Cysts* Minimum 50,000/mL 99.95% >99.99%
*NSF/ANSI Standard 58 certified to reduce cysts such as Cryptosporidium and Giardia by mechanical
means.
GRO-2550 SYSTEM INSTALLED WITH
P5, EPM-10, GRO-50EN, GS-10RO
FILTER CARTRIDGES
PERFORMANCE DATA
EPA # 082989-CHN-001
System Production Rate: 10.09 gpd (38.19 Lpd)
Recovery Rating: 31.76%
Efficiency Rating: 15.39%
TDS Rejection: 96.8%
GRO2550 Installation and Operation Manual • 15
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