Big Blue Filter Housing – 20 x 4.5 inch: 1.5″ In/Out Connections


Sold by the case, each case contains 4 complete housings

Pentair Big Blue Cartridge Filter Housing (4.5″ x 20″): with pressure release button

Has 1.5″ Female pipe thread connection for the Inlet and Outlet connections that are molded into the head assembly. This filter head has mounting locations for a wall mount bracket. This model includes the pressure relief port, to remove pressure when changing filters. This housing uses 4″ – 4.5″ diameter filters, with a length of 20.” Check out the carbon block and sediment filters for this housing.

SKU: 150235 Category:


Pentair Big Blue Cartridge Filter Housing (4.5″ x 20″): 

In the realm of water filtration, the Pentair Big Blue Cartridge Filter Housing in the 4.5″ x 20″ size stands tall, delivering a seamless blend of efficiency and versatility. Designed for both residential and industrial use, its generous dimensions ensure a constant flow of pristine water.

A Compact Powerhouse: Measuring 4.5″ x 20″, the Pentair Big Blue doesn’t just filter water; it transforms the filtration experience. Its compact design conceals a robust construction, standing resilient against corrosion and wear.

Versatile Filtration: Adaptable to various cartridge filters, the Big Blue is a chameleon in the filtration world. From sediment removal to impurity reduction, it accommodates your water quality needs with ease.

Efficiency Unleashed: Maintenance is a breeze with the Big Blue. Effortless cartridge replacements ensure minimal downtime, allowing you to focus on what matters most—clean water, hassle-free.

Leak-Free Assurance: No room for compromise. The Big Blue’s secure sealing mechanism guarantees leak-free operation, providing peace of mind and eliminating concerns about water wastage.

Upgrade your water filtration experience with the Pentair Big Blue Cartridge Filter Housing (4.5″ x 20″)—where compact design meets unwavering performance.

Additional information

Weight 25 lbs
Dimensions 24 × 24 × 20 in
Pressure Rating

90 PSI

Filter size

4.5" x 20"

Connection Type

Female pipe thread

Piping Connection Size


Has pressure relief valve


Case quantity

4 pieces