Pentair 4005742 | GRO50-RC RO Membrane for GRO-350B Systems | 1 Pack
Pentair 4005742 | GRO50-RC RO Membrane for GRO-350B Systems | 1 Pack is backordered and will ship as soon as it is back in stock.
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Pentair 4005742 | GRO50-RC RO Membrane for GRO-350B Systems | 1 Pack
The Pentair 4005742 (GRO50-RC) is a thin-film composite reverse osmosis membrane rated at 50 GPD, built to replace the RO stage in FreshPoint systems for clean, great-tasting drinking water at home.
Key Specifications:
| Compatibility | Pentair FreshPoint GRO-350B / 161110 |
| Capacity | 50 GPD, approx. 18 months |
| Contaminants Filtered | Dissolved solids, salts, chlorine, bacteria |
| Operating Conditions | Max 125 psi, Max 120°F |
| Number of Filters | 1-Pack (12-Pack variant: 655121-96 available here) |
Why Choose the Pentair 4005742 (GRO50-RC)?
- Superior Filtration: The Pentair 4005742 (GRO50-RC) uses a thin-film composite membrane to reduce dissolved solids and impurities for cleaner water.
- Reliable Performance: Delivers consistent 50 GPD output while maintaining a 1:1 recovery ratio for efficient water use.
- Cost-Effective: Extends system life and reduces reliance on bottled water, saving money over time.
- Easy Maintenance: Designed as a direct drop-in replacement for straightforward upkeep of your RO system.
How to Replace Pentair 4005742 (GRO50-RC):
- Turn off the water supply and depressurize the RO system.
- Open the membrane housing and remove the old membrane.
- Insert the new Pentair 4005742 (GRO50-RC) membrane into the housing.
- Reassemble the housing and restore the water supply.
- Flush the system for several minutes before regular use.
Notice: For detailed, step-by-step guidance, please refer to the guide here.
FAQ
Q: How Often Should the Pentair 4005742 (GRO50-RC) Filter Be Replaced?
A: This membrane is rated for approximately 18 months of use under normal operating conditions before replacement is recommended.
Q: How Can I Maximize the Filter's Lifespan?
A: Operate within the recommended pressure and temperature limits, log each replacement date, and avoid running unsafe or unknown-quality water through the system without proper disinfection.
Q: What Contaminants Does Pentair 4005742 (GRO50-RC) Filter Remove?
A: It reduces dissolved solids, salts, chlorine taste and odor, and bacteria for cleaner drinking water.
Q: What Certifications Does This Filter Have?
A: Specific certification details were not listed; please refer to Pentair's official documentation for current certification status.
Q: Is This a Genuine Filter? Is BottleFillingStations.com an Authorized Pentair Distributor?
A: Yes, this is a genuine Pentair 4005742 (GRO50-RC) filter so it will perform per manufacturer's standards and come included with a warranty. BottleFillingStations.com is an authorized Pentair distributor.
NOTICE: Do not use with water that is unsafe or of unknown quality without adequate disinfection either before or after the system.
"Hydrate Everyone, Everywhere!" BottleFillingStations.com | Contact us
The Pentair GRO50-RC (655121-96, 12 Pack; 4005742, 1 Pack) is the reverse osmosis membrane replacement for the Pentair FreshPoint GRO-350B Reverse Osmosis System. It is a high-efficiency 50 GPD membrane and should be replaced every 12–18 months, or sooner if TDS testing shows reduced performance.
Step-by-Step Replacement Guide
- Turn off the water supply to the system and open the faucet until water flow stops, then wait 5–10 minutes for the RO membrane to fully depressurize. Place a bucket or towel under the system to catch any drips.
- Lift the locking bar upward until the membrane cartridge disengages from the filter head assembly.
- Pull the membrane cartridge away from the filter head assembly, and make sure the locking bar stays fully in the up position.
- Align the posts on the new GRO50-RC membrane with the ports on the filter head assembly, then slide the cartridge into place. This engages the locking bar, causing it to drop forward and down.
- Pull the locking bar down until it snaps securely into place.
- Turn the water supply back on and check all fittings for leaks. Close the storage tank valve and let the faucet drip for 30 minutes, then fully open the water supply and let the faucet drip for a few more hours to flush the new membrane before closing the faucet and opening the tank valve to refill.
Looking for a genuine Pentair GRO50-RC RO membrane? Shop here.
