Replacement Filters
Hydronix - CB - 20" x 2.5" Coconut Carbon Block Filter
price
from $16.99
Omnipure - Q5628 - 12" x 2.5" Q-Series Twist Off T28 GAC Filter
price
from $24.15
PureT - SC Series - 10" x 2.5" String Wound Cartridge Filter
price
from $6.95
PureT - HQCBC Series - 20" x 2.5" Coconut Carbon Block Filter
price
from $16.49
PureT - HQCBC Series - 20" x 4.5" Coconut Carbon Block Filter
price
from $49.00
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.
