(7) Discharge from a relief valve into a water heater pan shall be prohibited.Ĭlick to expand.I fully understand this "simple requirement" I just think it's stupid and misguided. (6) The terminal end of the pipe shall not be threaded. (5) No part of such discharge pipe shall be trapped or subject to freezing. (4) Discharge in such a manner that does not cause personal injury or structural damage. (3) Discharge pipe shall discharge independently by gravity through an air gap into the drainage system or outside of the building with the end of the pipe not exceeding 2 feet (610 mm) and not less than 6 inches (152 mm) above the ground and pointing downwards. (2) Materials shall be rated at not less than the operating temperature of the system and approved for such use. (1) Equal to the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down. The discharge piping serving a temperature relief valve, pressure relief valve, or combination of both shall have no valves, obstructions, or means of isolation and be provided with the following: Another is the height above a floor.Ħ08.5 Discharge Piping. One difference is that the smitty pan is out. Be constructed of those materials listed in Section 605.4 or materials tested, rated and approved for such use in accordance with ASME A112.4.1. Not have a threaded connection at the end of such piping.ġ3. Terminate not more than 6 inches (152 mm) above and not less than two times the discharge pipe diameter above the floor or flood level rim of the waste receptor.ġ1. Be installed so as to flow by gravity.ġ0. Discharge to a termination point that is readily observable by the building occupants.ĩ. Discharge in a manner that does not cause personal injury or structural damage.ħ. Discharge to the floor, to the pan serving the water heater or storage tank, to a waste receptor or to the outdoors.Ħ. Serve a single relief device and shall not connect to piping serving any other relief device or equipment.ĥ. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap. Discharge through an air gap located in the same room as the water heater.ģ. Not be directly connected to the drainage system.Ģ.
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