Replacement Filters
Pentek - CBC-10 - 10" x 2.5" Carbon-Briquette 0.5 Micron Filter
price
from $42.97
Watts (WQCCC) Kwik-Change RO Pre-Carbon Block Filter
price
from $44.13
Rusco 1-1/2" Polyester or Stainless Steel Spin-Down Filter
price
from $37.28
Hydronix - SDC Series - 10" x 4.5" Melt Blown Sediment Filter
from $13.75
$29.99
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.
