Freeze Resistant In-Wall Valve

Model 6521FR freeze-resistant valve system for use with single bubbler wall mounted fountains shall include a brass pneumatic operated valve, waste assembly designed to drain water left in supply line to fountain, regulator valve to control stream height, insulated galvanized steel mounting box installed on interior wall where temperatures maintain a minimum of 50° F (10° C), 1/2" NPT supply, and 1-1/4" NPT trap.