How to change a temperature pressure relief valve

Hey guys, Jack here. Got a leaking temperature pressure relief valve(PTR Valve) that needs replacing… Then this message is just for you. I am going to show you exactly how to change yours out, in less than 5 minutes.

I’m not going to give you all the fluff like most other sites telling you how to test it and why you need to do or that or what it’s all for.

I’m guessing you already know all that or you don’t care.  I know you landed here wanting to know how to change a temperature pressure relief valve and that is what you are going to get.

There are few things you will need, and they are as follows:

Make sure that when you buy your new valve that you get the same KPA/PSI pressure rating as the existing. To check, on the existing valve, there is a tag or plate with the maximum rating on it. See the image below for more details.

tpr valvetemperature pressure relief valve

Now you have all the gear let’s get into it.

  1. First up you need to turn the water off to the unit itself. There is no need to turn the water off to the whole home unless there is no isolation valve is installed at the tank.
  2. Once you have turned the water off, pull the lever on the TPR valve to release any pressure build-up in the tank or you can open up a hot water tap.
  3. Thread tape up your new valve and have it ready to swap out once you have removed the old tpr valve.
  4. Remove the drain pipe that is attached is any and remove the nipple that the drain pipe attaches to.
  5. Remove the old pressure temperature relief valve and put to the side.
  6. Screw in the new until its tight and the outlet is facing the same location to reattach the drain pipe. Never go backward. If you go too far past the position just go around again.
  7. Screw the brass nipple into the valve and attach the drain pipe.
  8. Turn the water on, close off the hot tap if you opened one and then check the valve for any leaks.
  9.  Pull the lever to test and that’s it all done and dusted.

See it’s not that hard to replace t&p valve on a tank water heater.

The biggest point to take away is to turn the water off before removing the tpr valve as you are dealing with hot water here and get the exact same size pressure rating as what valve is there you have that you’re going to replace.



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