Pentair Big Blue® Heavy-Duty Filter Housing with Pressure Relief Button

Extra-large housing allows for greater cartridge capacity, helping to reduce the number of vessels required for high-flow rate and heavy-sediment applications. Compatible with a broad range of chemicals. Features a High-Flow Polypropylene Cap (HFPP) allows for a greater volume of liquid to pass more rapidly. Includes pressure relief on the inlet side of the cap that provides easier filter changes. Ideal for residential, commercial, and industrial use. Accepts 4-1/2" diameter cartridges.