Water Heater Pressure Relief Valve Discharge Pipe Code

Its proper functioning is the difference between a nice hot shower and an explosion.

Water heater pressure relief valve discharge pipe code.

Every relief valve which is designed to discharge water or steam shall be connected to a discharge pipe. 6 the terminal end of the pipe shall not be threaded. 4 discharge in such a manner that does not cause personal injury or structural damage. 8 termination of the tpr drain pipe cannot be more than 6 inches or less than two pipe diameters above the floor ground or waster receptor.

Not be directly connected to the drainage system. The temperature pressure relief valve tprv is an incredibly important life safety device on every water heater. 7 discharge from a relief valve into a water heater pan shall be prohibited. 5 no part of such discharge pipe shall be trapped or subject to freezing.

Discharge through an air gap located in the same room as the water heater. The discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. The indirect or local waste piping serving a water heater temperature and pressure relief valve or water treatment device may discharge through the cover of a clear water sump so as not to adversely affect floats by means of a fixed air gap installed in accordance with subs. 5 a the discharge pipe and fittings.

If the tpr valve is on top of the water heater install a short piece of cpvc from the valve to the side of the water heater then use a 90 degree fitting to make the turn towards the floor and add a second pipe to carry the discharge down to the catch pan. A trapped tpr dischage pipe is a common defect when a replacement water heater s tpr valve is lower than the original one and the installer connects to the exisitng discharge piping at the wall. Temperature and pressure relief valves shall be installed so that the sensing element of the valve extends into the heater tank and monitors the temperature in the top 6 inches of the heater or tank.