Replacement Filters
Omnipure - K5668 - 12" x 2.5" GAC with 1 lb of KDF-55 Inline
price
from $44.27
Omnipure - K5555 - 10" x 2.5" DI Mixbed Inline Filter
price
from $31.44
Pentek - GAC-BB - 10" x 4.5" Big Blue Granular Activated Carbon Filter
price
from $77.16
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.
