What replacement filters fit a Pentair GRO-2550?
The Pentair GRO-2550 reverse osmosis system uses 4 filter stages.
Key takeaways
- Reverse Osmosis system by Pentair.
- 4 filter stages: GS10-RO, P5, EPM-10, GRO-50EN.
- A component cartridge is NSF-listed, though the system itself isn't separately listed.
- A cheaper compatible filter set can fit the same housings - confirm its own certification before buying.
Buy the replacement filters for your GRO-2550
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Filter stages
- Stage 1
- GS10-RO
- Stage 2
- P5
- Stage 3
- EPM-10
- Stage 4
- GRO-50EN
NSF-certified components in the GRO-2550 filter set
The GRO-2550 system itself isn't separately listed in the NSF database, but at least one of its cartridges is independently NSF-listed to reduce the following, grouped by the standard it was tested to:
NSF/ANSI 58 - Cyst
Cyst, TDS, Arsenic (Pentavalent), Barium, Cadmium, Chromium (Hexavalent), Chromium (Trivalent), Copper, Fluoride, Lead, Radium 226/228, Selenium, Turbidity
Filters for the rest of your home
FiltersDex covers the exact replacement filter - and what it removes - across every appliance:
Frequently asked
What replacement filters fit a Pentair GRO-2550?
The Pentair GRO-2550 uses 4 filter stages: GS10-RO, P5, EPM-10, GRO-50EN.
Is the Pentair GRO-2550 NSF certified?
The Pentair GRO-2550 system itself isn't separately listed in the NSF DWTU database, but at least one of its filter cartridges is independently NSF-listed.
Does the Pentair GRO-2550 remove lead?
We don't have an independent NSF listing for the Pentair GRO-2550, so we can't confirm a lead-reduction claim either way. Check the manufacturer's own certification documents.
Should I buy the genuine filter set or an aftermarket one?
The genuine Pentair cartridges are the safe, exact-fit choice. A cheaper compatible set can fit the same housings too - just confirm it carries its own independent certification for the contaminants you care about before buying.