Big Blue filter housings offer the versatility to meet all of your large capacity filtration needs, including high-flow and heavy-sediment applications. The extra large housing allows for greater cartridge capacity, reducing the number of vessels required for high flow-rate applications.Large capacity housing suitable for high flow applicationsPressure-relief/bleed button on inlet side of capAccepts 4-1/2" diameter cartridgesThe high-flow polypropylene (HFPP) cap is available with 3/4", 1", and 1.5 NPT inlet and outlet ports. Big Blue housings are compatible with a broad range of chemicals. They accept a wide variety of 4-1/2" diameter cartridges in 20" lengths.Materials of ConstructionHousing: PolypropyleneCap: Polypropylene (HFPP)Button Assembly: 300-series Stainless Steel, Polypropylene and EPDMO-Ring: Buna-NMaximum Temperature: 100°F (37.8°C)Maximum Pressure: #20BB 90 psi (6.2 bar)