Big Blue Filter Housings
Find the right Big Blue housing for your whole house filtration setup. We carry Pentek-compatible 10" and 20" housings with 1" ports, designed for standard residential point-of-entry installations.
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Big Blue HFPPPentek 10 inch filter housing with 1 inch portsPart# 150238
How Big Blue Filter Housings Work
Big Blue filter housings are installed on the main water supply line where it enters your home, treating all water before it reaches any fixture, appliance, or point-of-use system. This is called a point-of-entry installation, and it means every faucet, shower, washing machine, and water-using appliance in the house receives filtered water.
The housing consists of a durable outer sump with a head assembly that contains the inlet and outlet ports. Water enters through the inlet port on the head, passes downward through the filter cartridge seated inside the sump, and exits through the outlet port on the opposite side. The sump is removed periodically using the housing wrench for cartridge replacement, then hand-tightened back into place.
The W305H accommodates 10" x 4.5" filter cartridges and the W306H accommodates 20" x 4.5" cartridges. Both housings have 1" ports to match standard residential whole-house supply line connections. The 20" housing holds a larger cartridge, which provides a longer filter life and is better suited to higher daily water usage before the cartridge needs changing.
Why Choose Our Big Blue Housings
Pentek-compatible housings built for standard residential whole-house installation
Available in 10" and 20" to match your space and usage requirements
1" ports for standard whole-house supply line connections
Compatible with sediment and carbon block cartridges sold in our Big Blue filter categories
Ships fast with UPS tracking on every order
100% satisfaction guarantee
Keeping Your Housing in Good Shape
The housing itself does not have a replacement schedule, but the cartridges inside do. Sediment filter cartridges typically need replacing every 6 to 12 months, and carbon block cartridges on a similar schedule, depending on water quality and household usage. Inspect the housing O-ring at each cartridge change and replace it if it shows cracking or flattening. A failing O-ring is the most common cause of leaks at the housing sump joint.