Water Heater Relief Valve Pipe

Scalding water and steam escape the tank through the valve and tube to relieve the pressure.

Water heater relief valve pipe.

By code you have to run the same size as the opening which means the pipe needs to be 3 4 in diameter. When no water exits the discharge pipe from the t p valve close the drain valve and remove the garden hose. Building codes require temperature pressure relief tpr valves with discharge pipes on all new water heater installations. If the water heater thermostat fails to turn off at its temperature setting and continues to heat the water indefinitely the tpr valve will open and let the overheated water out.

Most residential water heaters have a 3 4 threaded opening for the discharge pipe. Heating element pressure relief valve rheem water heater accessories gas valve water heater accessories treater smokers hotwire. The relief valve on your water heater has a pipe attached. This valve allows water or steam to escape from the water heater if the temperature or pressure gets.

Open the drain valve on the water heater then open the hot water tap at a nearby sink to release the vacuum on the tank. If the pressure in the tank exceeds 150 psi or the temperature exceeds 210 degrees fahrenheit the tpr valve opens to release the pressure. The pipe itself needs to be either copper cpvc or galvanized water piping. The temperature pressure relief valve or tpr valve on any heated appliance that contains water such as a heating boiler hot water tank water heater water cylinder must have a drain line or discharge tube properly installed routed and made of proper materials.

Place a bucket under the discharge pipe connected to the valve to collect any water and open the t p valve.