The Pentek 150576 3G housing has 3/4"" inlet/outlets, The Pentek 150576 filter housing also features a mounting bracket built-in to the cap for easy installation, The red pressure-relief button on the cap makes filter changes easier by releasing any pressure inside the housing, The Pentek 150576 housing must be used with one of the two Pentek pressure gauges, The housing will not work if a pressure gauge is not used, The pressure gauge helps to determine when the water filters need to be replaced, The Pentek 3G MM 150576 filter housing can use any 20"" L x 2, 5"" W water filter, The Pentek 3G IB MM 150576 water filter housing has an integrated bracket so a separate bracket does not need to be purchased, Dimensions: 23, 5"" x 5, 75"" (597 mm x 146 mm), Height does not include required meter, Add 1, 75"" for the 143549 meter, Housing: Polypropylene (Opaque), Cap: Reinforced Polypropylene, O-Ring: Buna-N, SKU: CWD2015