How to Fix a Leaking Water Heater Pressure Relief Valve

What You'll Need
Garden hose
Pipe wrench
Scrub brush
Teflon tape

A water heater pressure relief valve is what prevents the levels of pressure from your water heater from getting to dangerous levels. If it leaks, then it can do quite a bit of damage in just a short amount of time with just the water that is leaked. Usually, what causes a leak is the minerals in the water that will deposit on your valve. This happens whenever it is opened to take off some of the pressure. The sooner you are able to fix the leak, the better.

Step 1 – Prepare

Begin to by turning your water heater off. In order to do this, look to the bottom of the box. This is where the water heater control unit is. It is best if you are able to have the operating manual instructions nearby so that you will know exactly how to turn the unit off.

Step 2 – Water Supply

The water supply is going to need to be turned off. In order to do this, get a garden hose and attach it to the bottom drain valve. After you have done this, open the valve to get the tank completely empty. Then, get the flow of the hot water and direct it into an area that will not be damaged. Remember that this water is going to be extremely hot. Get your hose and put it far from your home.

Step 3 – Drain the Pipe

Using the pipe wrench, get the drain pipe and disconnect it from the TRP valve. Once you have done this, the TPR valve will need to be removed. This may take a while and some strength because they are usually attached pretty tight. The best way to remove it is to get a long handled wrench and a cheater bar.

Step 4 – Soak

Now it is time to allow the TPR valve to soak. Mix 4 cups of hot water with a 1/2 cup of CLR cleaner. The TPR valve will need to soak for about 2 minutes. Once it has soaked, it will need to be scrubbed with a scrub brush to remove all of the mineral deposits.

Step 5 – Teflon Tape

Wrap up the threads at least 2 times around with some Teflon tape. Once you have done this, you will need to get your TPR valve inserted into the tank fitting. Make sure that it is attached tightly. Wrap up the drain pipe threads with Teflon tape and then attach the TPR valve. This will help to prevent future leaks.

Step 6 – Finish Up

Once you have finished, you will be able to get the bottom of the drain valve closed up. Remove your garden hose and turn the cold water back on until the tank is full. Check for leaks as you do this. Once you are sure there are no leaks, turn the gas on to your unit and relight your pilot.