Description Rainwater Treatment Cartridge Housings, Big Blue Housing 4.5″ X 20″ Features: High durability commercial filter housings for rainwater water treatment filter cartridges. (Sold without cartridge) Pressure release button Maximum 100 PSI 1″ FIPT Inlet and Outlet Accepts 4.5″ x 20″ cartridges Made from durable polypropylene
