Water Heater Pressure Relief Valve Discharge Pipe Code

The relief valve on your water heater has a pipe attached.

Water heater pressure relief valve discharge pipe code.

Temperature pressure relief tpr valves rarely go off. The temperature pressure relief valve tprv is an incredibly important life safety device on every water heater. Not be directly connected to the drainage system. 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.

Storage water heaters operating above atmospheric pressure shall be provided with an approved self closing levered pressure relief valve and temperature relief valve or combination thereof. The relief valve shall not be used as a means of controlling thermal expansion. Unlike the expansion tank which is intended to protect the piping system from pressure the tprv protects the water heater tank from experiencing. Most residential water heaters have a 3 4 threaded opening for the discharge pipe.

Its proper functioning is the difference between a nice hot shower and an explosion. The discharge piping serving a pressure relief valve temperature relief valve or combination thereof shall. The relief valve shall conform to ansi z21 22. Super hot and high pressure water gets released to keep the tank from exploding like a bomb.

504 6 requirements for water heater tpr valve discharge piping. 2014 fbc residential 5 th edition 28 water heaters p2803 relief valves p2803 6 installation of relief valves p2803 6 1 requirements for discharge pipe jump to full code chapter the discharge piping serving a pressure relief valve temperature relief valve or combination valve shall. But if one does it s a big deal. 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.

The pipe itself needs to be either copper cpvc or galvanized water piping. Discharge through an air gap located in the same room as the water heater. Not be directly connected to the drainage system. So both the international residential code irc and the residential edition of the florida building code fbc p2804 6 1 have the following requirements to make sure that there are no obstructions or the possiblity of injury from the scalding water if the valve opens.