A valve body having upper and lower sections, said lower section having an outlet chamber and an inlet for water extending into said outlet chamber, and terminating in an annular valve seat, said upper section having a cylindrical chamber,Cast Steel Valves aligned with said valve seat, a cylindrical valve plunger non-rotatably and reciprocably supported in said upper section chamber for movement along the axis of said valve seat between valve open and valve closed positions, said plunger having a tubular end portion concentric with and having a larger inside diameter than the inside diameter of said valve seat and leaving a clearance space adjacent the outer edge of said valve seat in the closed position of the valve plunger, a stem projecting from one end of the valve body and extending into said upper section thereof, cam means carried within said upper section connected for rotation by said stem and operable upon rotation of the stem to push said plunger toward said valve seat, and a diaphragm of resilient rubber like material mounted at its periphery between said valve body sections, said diaphragm providing a fluid barrier between said outlet chamber and said upper section chamber for maintaining said plunger, cam plate and stem dry, said diaphragm having a raised portion received in said tubular end portion of said valve plunger and a valve closure portion which is held by said valve plunger in alignment with the valve seat, and pressed against said valve seat in the valve closed position of said plunger, and which has clearance with the valve seat in the valve open position of said plunger to admit water from said inlet to the outlet chamber, and a supporting section extending outwardly from said closure portion through said clearance space to said periphery, including a portion having loops which rolls without stretching beyond the fatigue limit of said material during the stroke of the valve plunger between said positions, said lower section of said valve body including a second outlet chamber and a second inlet terminating in a second valve seat, said inlets being separate and provided for supply of hot and cold water respectively, a common outlet passage for mixed hot and cold water communicating with both said outlet chambers,Filter a second plunger supported for reciprocation along the axis of said second valve seat, and a second diaphragm mounted between said valve body sections, each of said diaphragms having a valve closure portion adjacent the respective valve seat and adapted to be pressed against the respective valve seat by one of said plungers, said rotary cam plate having separate hot and cold water cam surfaces engaging said plungers respectively, FILTER SERIESand operable upon rotation of the stem and cam plate to reciprocate said plungers and in combination to move said closure portions of said diaphragms relative to said valve seats to proportion the mixture into said common outlet passage of hot and cold water from said separate inlets.

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