Pentair GRO-2550 4-Stage Reverse Osmosis Water Filtration System

Features and Benefits

Installation Tips

Operation Tips

Applications

Shipping Specifications

PART NUMBER MODEL DESCRIPTION CARTON QTY. CARTON DIMENSIONS (INCHES/MILLIMETERS)
161154 Pentair GRO-2550 4 Stage GRO Reverse Osmosis System 1 18.7" L X 16" W X 18.2" H (475 mm X 406 mm X 462 mm)
4004424 GRO-50EN Stage 3, 50 GPD Encapsulated GRO Reverse Osmosis Membrane w/ DLFC 16 11.5" L X 12" W X 17" H (292 mm X 305 mm X 431 mm)
155014-43 P5 Spun Polypropylene Stage 1 Sediment Pre-Filter, 5 Micron 24 16" L X 10.75" W X 10.5" H (406 mm X 273 mm X 268 mm)
155634-43 EPM-10 Stage 2 Carbon Block Pre-Filter 12 13" L X 10.5" W X 11" H (330 mm X 268 mm X 279 mm)
255521-43 GS-10RO-B Stage 4 GAC Post Filter 12 10" L X 9" W X 7" H (254 mm X 229 mm X 178 mm)

Performance

The GRO-2550 system installed with P5, EPM-10, GRO-50EN, GS-10RO filter cartridges 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.

MODEL GRO-2550

Substance Influent Challenge Concentration Max. Permissible Product Water Concentration Reduction Requirements Average Reduction
Total Dissolved Solids 750 ± 40 mg/L 187 mg/L 96.5% >99.99%
Cysts* Minimum 50,000/mL 187 mg/L 99.95% 96.5%

* NSF/ANSI Standard 58 certified to reduce cysts such as Cryptosporidium and Giardia by mechanical means.

EPA EST. NO. 082989-CHN-001

System Tested and Certified by NSF International against NSF/ANSI Standard 58 for the reduction of the claims specified on the Performance Data Sheet.

Specifications

Contact Information

Pentair Residential Filtration
13845 Bishops Dr. | Suite 200 | Brookfield, WI 53005 | United States
P: 262.238.4400 | Customer Service: 800.279.9404 | tech-support@pentair.com | pentair.com

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© 2025 Pentair. All Rights Reserved.

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