This temperature pressure relief valve is attached to the discharge pipe.
Water heater pressure relief valve pipe outside.
All pressurized non storage type water heaters shall be provided with a pressure relief valve installed at the hot water outlet with no shut off valve between the heater and the relief valve.
So this release of its pressure causes your hot water tank overflow pipe dripping towards the floor where the hot water heater is placed.
When no water exits the discharge pipe from the t p valve close the drain valve and remove the garden hose.
Place a bucket under the discharge pipe connected to the valve to collect any water and open the t p valve.
This valve allows water or steam to escape from the water heater if the temperature or pressure gets.
If the temperature in the water heater reaches 210 or the pressure reaches 150 psi the relief valve will open reducing the pressure or releasing heated water to be replaced with cold water.
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.
Just image the power that can be generated when the water starts to boil inside the tank.
A good solution to this risk is the relief valve.
The relief valve is an important safety feature on the water heater.
If at any point the temperature or pressure reaches an unsafe level the water heater triggers the relief valve to open and release water out of the tank until the temperature.
It s designed to release the pressure when there is too much of a load built up inside the water heater.
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.
In order to replace the temperature pressure relief valve of hot water heater simply follow these steps.
The valve should be connected to a discharge pipe also called a drain line that runs down the length of the water heater tank.
Then turn it off so that the cold water couldn t enter in the system.
What does the relief valve do.
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.
First and on the top find the entering point of cold water in the tank.
The tpr valve will activate if either water temperature measured in degrees fahrenheit or pressure measured in pounds per square inch psi exceed safe levels.
This is to prevent a potentially catastrophic failure.
Many regions require the t p valve to lead outside for added safety and some may even require two valves for redundancy.
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.
Water heaters come equipped with a temperature and pressure relief valve also known as a tprv.
