a mounting height of 38 to 40 inches above the floor is recommended

and completely weatherproof

Connection: 5/8" x 20" Thread

urethane construction allows the pad to deform and seal off most drains temporarily seals to any smooth surface

3R Code (Waterproof)

Apollo Bronze POP Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 511DCDKMAA0150 Operation-Manual Push a mounting height of 38This safety relief valve features a full nozzle design, and can be used in closed systems. It also features metal to metal seating and is ideal for pressure vessels and pressure piping systems. Valves are factory preset and sealed to prevent tampering. Not adjustable.