Rough-In: 4 1/4 in

Model has an O-ring that is captured in a brass poppet to seal on a brass seat in the check valve body

Furthermore

a cold water by-pass valves open in the event of hot water pressure loss

Bradley P15-405 Service Kit- (5) Per Pack Replacement Part for Bradley Washroom Accessory Products

Halsey Taylor Non-Refrigerated, Dispenser Design Wall, Water Cooler, Number of Levels 1, Front Push Button - 7433003783 Josh Rough-In: 4 1/4 inThis durable, sturdy, and virtually maintenance free Halsey Taylor drinking fountain features a Double Bubbler projector with antisquirt groove. It also features a self closing stop and can be installed with remote chillers, available separately. The softly rounded corners and contoured basin are designed to help provide a splash resistant surface.