This temperature pressure relief valve is not directly attach with the hot water pressure heater.
Hot water heater relief valve pipe.
Place a bucket under the discharge pipe connected to the valve to collect any water and open the t p valve.
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.
This valve allows water or steam to escape from the water heater if the temperature or pressure gets.
Instead it is attached with a discharge pipe link with hot water heater.
In most of the disasters caused by hot water heater pipe leaking from the top the trp valve is involved.
Most residential water heaters have a 3 4 threaded opening for the discharge pipe.
When no water exits the discharge pipe from the t p valve close the drain valve and remove the garden hose.
Water heaters come equipped with a temperature and pressure relief valve also known as a tprv.
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.
The relief valve on your water heater has a pipe attached.
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.
By code you have to run the same size as the opening which means the pipe needs to be 3 4 in diameter.
The pipe itself needs to be either copper cpvc or galvanized water piping.