Pentair RO Replacement Filters & Membranes
Replacement filter sets and membranes for Pentair and Franklin Electric / Pentair Green RO under-sink reverse osmosis systems.
- Pentair GRO-2550 (4-stage, 50 GPD): complete filter set with 4002574 membrane
- Pentair Green RO GRO-50-5 (5-stage, 50 GPD): filter set with optional 1:1 high-recovery membrane
- Membranes: Pentair GRO encapsulated membrane with check valve (1:1 ratio) and Pentair TLC membrane element
Replace pre-filters every 6–12 months and the membrane every 2–3 years. Not sure which set fits? Call (714) 541-6600 with your model number.
Stage-by-stage fit guides: Franklin Electric / Pentair Green RO GRO-50-5 (5-stage, 50 GPD) · Franklin Electric / Pentair GRO-2550 (4-stage, 50 GPD) · Pentek RO-2550 (161079). See all 154 systems.
