Replacement Filters for the Pentek RO-2550 Reverse Osmosis System
Pentek · 4-Stage Reverse Osmosis
Replacement Filters for the Pentek RO-2550 Reverse Osmosis System
Every filter your RO-2550 needs — stage by stage — led by the IPW one-year kit.
Also sold as: Pentek RO-2550 · Pentek 161079 · American Plumber WRO-2550
✓ One-year supply — 6 pieces incl. 50 GPD membrane
Pentek RO-2550 compatible filter kit — 50 GPD
$60.99
2 × 5µm sediment, 2 × carbon block, 1 × inline GAC post-filter (¼" FPT) and 1 × 50 GPD TFC membrane. Two pre-filter changes per year.
🛒 Add the kit to cartFilters by stage
Buy a kit above, or replace stages individually below.
1
Sediment pre-filter
5µm · standard 10" × 2.5"
IPW 5M-SED — 5µm sediment — $3.50
Name-brand alternative: Pentek P5 — $10.83
2
Carbon block pre-filter
5µm coconut carbon block · standard 10" × 2.5"
4
Inline post-carbon
10" × 2" coconut GAC · ¼" FPT threaded ends
IL-10W-C-14 — inline GAC, ¼" FPT — $8.12
Name-brand alternative: Omnipure CL10ROT33-B — $12.99
When to replace
🪣 Sediment & carbon: every 6–12 months🥤 Inline post-filter: every 12 months💧 RO membrane: every 2–3 years
Fits the Pentek RO-2550 with standard 10" × 2.5" housings — not sure? call (714) 541-6600
Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number printed on your current filter, or by snapping a photo.
Pentek RO-2550 filter FAQ
What filters does the Pentek RO-2550 use?
Four stages: a 5 micron sediment pre-filter and a carbon block pre-filter (both standard 10" × 2.5"), a 50 GPD thin-film composite membrane and an inline GAC post-filter. Our one-year kit has two of each pre-filter plus the membrane and post-filter.
Does the Pentek RO-2550 take the same filters as the Pentair GRO-2550?
Not all of them. The pre-filters are both standard 10" × 2.5", but the GRO-2550 uses an encapsulated 1:1 GRO membrane and a 3/8" quick-connect post-filter. The RO-2550 uses a standard 1812 membrane and a ¼" FPT post-filter. See our Pentair GRO-2550 page.
How often should I change RO-2550 filters?
Change the sediment and carbon pre-filters every 6 to 12 months, the post-filter every year and the membrane every 2 to 3 years, or sooner if flow drops or TDS rises.
Does the kit fit the American Plumber WRO-2550?
Yes, our kit is listed for the Pentek RO-2550 and the American Plumber WRO-2550. If your housings are not 10" × 2.5", call (714) 541-6600 before you order.
All replacement filters by system · Pentair RO replacement filters & membranes · Franklin Electric / Pentair GRO-50-5 · Universal 4-stage RO
Compatibility reference only. Photos of complete systems shown on this page are provided to help you identify your unit and confirm that our filters fit. All brand names, model numbers, and product images are the property of their respective owners; Isopure Water (IPW Industries Inc.) is not affiliated with, sponsored by, or endorsed by these manufacturers. We sell compatible replacement filters and parts — not the branded systems pictured, unless a system is separately listed for sale on our store.
