Replacement Filters
Pentek - P Series 20"x2.5" Spun Polypropylene Sediment Filter
price
from $12.00
Pentek - PCF1-10MB - 10" x 2.5" Mixed Bed Deionization Filter
price
from $66.58
Rusco 2" Polyester or Stainless Steel Sediment Trapper Filter
price
from $86.13
Omnipure - L5533 - L-Series 10" x 2.5" Twist Off T33 GAC Filter
price
from $24.01
Empty Refillable Cartridge 20" x 4.5" White
price
$50.65
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.
