Tp Valve Hot Water Heater

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.

Tp valve hot water heater.

Asme ansi and csa aga approved relief valves protect the water heater from excess pressures and temperatures by discharging water. On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward. If the water inside the unit gets too hot usually above 210 degrees or pressure builds up too high above 150 psi the water heater can become damaged or even explore. Temperature pressure relief or tpr valves are safety devices installed on water heating appliances such as boilers and domestic water supply heaters.

Tprs are designed to automatically release water in the event that pressure or temperature in the water tank exceeds safe levels. A high quality t p valve on water heater will do it for you automatically. T p valves used on residential water heaters are typically designed and manufactured to relieve pressure at 150 psi and temperature at 210 degrees f. Every water heater whether gas or electric needs a temperature and pressure relief valve because without one it could begin to leak or even explode.

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. But if the termination of the piping is not readily visible such as if it is located under the house the water will continue to drain until the homeowner gets an amazing electric or gas bill and goes searching for the reason. If all goes well a tpr valve never gets used except during testing. The last line of defense for pressurized equipment temperature and pressure t p relief valves protect equipment from excess pressure and ultimately catastrophic failure.

When the water temperature is in the range of 120 to 140 degrees fahrenheit a metal tank that holds hot water will expand. Tighten it with a wrench but don t over tighten. The t and p valve which is located on the. 6 wind teflon pipe thread tape on the threads of the new t p valve winding counterclockwise.

Unscrew the old t p valve from the water heater turning it counterclockwise with a large wrench. The purpose of this drain line is to discharge potentially hot scalding water to a safe location so that a bystander is not scalded. Then screw the new valve into the water heater turning it clockwise. A good solution to this risk is the relief valve.