Isopure Water · Housings & Hardware

Shop Housings & Hardware

Browse housings & hardware by category — jump straight to the group you need. Not sure which fits? Our team and the Filter Finder will match you fast.

Find the right part → or call (714) 541-6600
Standard Housings Standard Housings26 products Big Blue Housings Big Blue Housings12 products Slim Line Housings Slim Line Housings6 products Membrane Housings Membrane Housings16 products Commercial / Industrial Commercial / Industrial3 products Bag Filter Vessels Bag Filter Vessels2 products O-Rings & Gaskets O-Rings & Gaskets125 products Brackets, Wrenches & Gauges Brackets, Wrenches & Gauges83 products Pressure Gauges Pressure Gauges11 products
Isopure Water · Filter Housings

Water Filter Housings for Whole-House, RO & Under-Sink Systems

Filter housings are the pressure vessels that hold your filter cartridges and tie them into your plumbing. Choosing the right one comes down to three things: the cartridge size it accepts, the port size that matches your pipe, and the flow your household or application needs. We stock genuine housings from Pentek, PureT, Watts, Hydronix, Kemflo and Flomatic — from compact Slim Line units to 20" Big Blue whole-house vessels and RO membrane housings.

How to choose a filter housing

Match the cartridge size. Standard 2.5"-diameter housings take common 10" or 20" cartridges; 4.5"-diameter "Big Blue" housings handle high-flow whole-house filtration. Housing length should match your cartridge length.
Check the port size. Housings ship with 1/2", 3/4", or 1" NPT inlet/outlet ports — match the port to your incoming line so you don't choke flow.
Clear vs. opaque sump. Clear sumps let you eyeball cartridge condition; opaque blue, white or black sumps block light to discourage algae on longer service cycles.
Keep a spare O-ring. The housing O-ring is the #1 wear part — a fresh one at each cartridge change is the cheapest leak insurance there is.

Not sure which housing fits your setup? We've spent 20+ years in water treatment — tell us your system and we'll match you to the right vessel, cartridge and O-ring the first time.