Replacement Filters
Omnipure - E5528 - 10" x 2.5" E-Series T28 GAC Carbon Filter
price
from $23.78
Omnipure - Q5662 - 12" x 2.5" Q-Series Twist Off NRW-37 DI Mixbed Filter
price
from $38.37
Pentek - R-Series 10" X 2.5" REUSABLE Pleated Polyester Filter
price
from $16.72
Isopure Water · Replacement Filters
Replacement Water Filter Cartridges
This is our largest category — the sediment, carbon and specialty cartridges that keep every system producing clean water on schedule. We stock spun, pleated and melt-blown sediment filters, GAC and carbon-block cartridges, and complete RO cartridge sets from Watts, PureT, Pentek, Valuetrex and more, in every common size.
How to choose a replacement cartridge
Match size and micron. Standard 10"/20" x 2.5" and Big Blue 4.5" cartridges come in 1–50 micron — match your housing and the job (finer = more polish, less flow).
Sediment type. Spun/melt-blown are depth filters (great value); pleated filters offer more surface area and can be rinsed.
Carbon stage. GAC and carbon-block cartridges handle chlorine, taste and odor — the second stage in most systems.
Buy by system for RO. Complete cartridge sets match a specific RO unit so you replace everything on one schedule.
Tell us your system or housing size and we'll match the cartridges. Start here.
