How do I replace a water heater gas line shut off valve with a pressure relief valve?

February 28, 2023

Introduction

Replacing a water heater gas line shut off valve with a pressure relief valve is a common upgrade that many homeowners opt for. The pressure relief valve is an essential safety feature that helps prevent explosions in case of excessive pressure buildup in the water heater. In this article, we will provide a step-by-step guide on how to replace a water heater gas line shut off valve with a pressure relief valve.

Step 1: Turn off the gas supply

Before starting any work, it is crucial to turn off the gas supply to the water heater. You can locate the gas shut-off valve near the water heater and turn it off by rotating the valve handle until it is perpendicular to the gas line.

Step 2: Drain the water heater

Next, you need to drain the water heater. You can do this by connecting a garden hose to the drain valve at the bottom of the water heater and letting the water flow out. You can also open a hot water faucet to help speed up the draining process.

Step 3: Remove the old gas line shut off valve

Once the water heater is drained, you can remove the old gas line shut off valve. Use a wrench to loosen and remove the fittings on both sides of the valve. Make sure to have a backup wrench to hold the valve body in place while you remove the fittings.

Step 4: Install the pressure relief valve

Now that the old gas line shut off valve is removed, you can install the pressure relief valve. Apply a Teflon tape to the threads of the new valve and screw it into the fitting on the water heater. Use a wrench to tighten the valve securely.

Step 5: Connect the gas line

Once the pressure relief valve is installed, you can connect the gas line. Apply Teflon tape to the threads of the gas line and screw it into the fitting on the pressure relief valve. Use a wrench to tighten the fitting securely.

Step 6: Turn on the gas supply

With the gas line connected, you can turn on the gas supply to the water heater. Turn the gas shut-off valve handle parallel to the gas line to allow the gas to flow.

Step 7: Test the pressure relief valve

Finally, you need to test the pressure relief valve. To do this, turn on the water supply to the water heater and let the tank fill. Once the tank is full, open a hot water faucet to create a flow of hot water. The pressure relief valve should release water to relieve pressure buildup. If it doesn’t, turn off the water supply and gas supply and double-check the installation.

Conclusion

Replacing a water heater gas line shut off valve with a pressure relief valve is a simple process that you can do yourself. However, it is essential to follow the safety precautions and steps outlined above to ensure that the installation is done correctly. By following this guide, you can upgrade your water heater with a pressure relief valve and ensure the safety of your home and family.