Are you tired of taking cold showers every morning? Or have you noticed that your hot water heater is not functioning as efficiently as it used to? If so, it might be time to change your gas hot water heater.
Changing a gas hot water heater might seem like a daunting task, but with the right tools and knowledge, it can be done in just a few hours. In this article, we will provide you with a step-by-step guide on how to change a gas hot water heater so that you can enjoy hot water whenever you need it.
Turn Off and Drain the Old Water Heater

Before you start changing your gas hot water heater, the first step is to turn off the gas and water supply to the old water heater. This is a crucial step to ensure your safety during the process.
Step 1: Turn off the gas supply
The gas supply valve is usually located near the bottom of the water heater. Turn the valve to the off position to stop the gas flow to the water heater. If you have trouble locating the valve, consult your user manual or contact a professional for assistance.
Step 2: Turn off the water supply
The water supply valve is usually located above the water heater. Turn the valve to the off position to stop the water flow to the water heater. This will prevent water from leaking out when you drain the old water heater.
Step 3: Drain the old water heater
Connect a garden hose to the drain valve located near the bottom of the old water heater. Place the other end of the hose in a floor drain or outside where it can safely drain. Open the valve and allow the water to drain completely out of the old water heater. Once the old water heater is drained, you can safely remove it.
Remove the Old Water Heater

Now that you have turned off the gas and water supply and drained the old water heater, it’s time to remove it.
Step 1: Disconnect the gas supply
Use a pipe wrench to loosen the union fitting that connects the gas supply line to the water heater. Once the fitting is loose, use a wrench to disconnect the gas supply line from the water heater.
Step 2: Disconnect the water supply
Use a wrench to loosen the nuts that connect the cold and hot water supply lines to the water heater. Once the nuts are loose, use a wrench to disconnect the water supply lines from the water heater.
Step 3: Move the old water heater out of the way
With the gas and water supply lines disconnected, you can now move the old water heater out of the way. Be careful not to damage any surrounding areas or the new water heater. It’s best to have a helper to assist you with this step.
By following these steps, you have successfully turned off and drained the old water heater and removed it. In the next section, we will guide you on how to install the new water heater.
Remove the Old Water Heater
Now that you have turned off the gas and water supply and drained the old water heater, it’s time to remove it.
Step 1: Disconnect the gas supply
Use a pipe wrench to loosen the union fitting that connects the gas supply line to the water heater. Once the fitting is loose, use a wrench to disconnect the gas supply line from the water heater.
Step 2: Disconnect the water supply
Use a wrench to loosen the nuts that connect the cold and hot water supply lines to the water heater. Once the nuts are loose, use a wrench to disconnect the water supply lines from the water heater.
Step 3: Move the old water heater out of the way
With the gas and water supply lines disconnected, you can now move the old water heater out of the way. Be careful not to damage any surrounding areas or the new water heater. It’s best to have a helper to assist you with this step.
Install the New Water Heater
Now that you have removed the old water heater, it’s time to install the new one. Here’s a step-by-step guide on how to connect and properly install your new gas hot water heater.
Step 1: Choose the right location
Choose a location for the new water heater that is safe and convenient. Make sure it meets the manufacturer’s recommendations for clearance space and ventilation.
Step 2: Connect the water supply lines
Connect the cold and hot water supply lines to the new water heater using the wrench. Make sure the lines are properly aligned and tightened to prevent leaks.
Step 3: Connect the gas supply line
Connect the gas supply line to the new water heater using the union fitting and wrench. Make sure the gas supply line is properly aligned and tightened to prevent leaks.
Step 4: Test for leaks
Turn on the gas and water supply valves and check for any leaks. Use a soap and water solution to check for gas leaks. If you notice any leaks, turn off the gas and water supply and call a professional for assistance.
Step 5: Light the pilot light
If your new water heater has a pilot light, follow the manufacturer’s instructions to light it. This will ensure that your new water heater is functioning properly.
By following these steps, you have successfully installed your new gas hot water heater. Make sure to follow the manufacturer’s instructions for maintenance and safety to ensure your new water heater lasts for years to come.
Turn On the New Water Heater
Now that you have removed the old water heater, it’s time to install the new one. Follow these steps to turn on the gas and water supply and ensure proper functioning.
Step 1: Connect the gas supply
Connect the gas supply line to the new water heater using the union fitting. Tighten the fitting securely with a pipe wrench.
Step 2: Connect the water supply
Connect the cold and hot water supply lines to the new water heater using the wrench. Tighten the nuts securely to prevent leaks.
Step 3: Turn on the gas and water supply
Turn on the gas and water supply valves and wait for a few minutes for the water to heat up. Check the pilot light to ensure it’s lit. If the pilot light is not lit, follow the instructions provided in your user manual to relight it.
Step 4: Check for leaks and proper functioning
Check the water heater and surrounding areas for any signs of leaks. If there are any leaks, turn off the gas and water supply and tighten the connections. Once you have checked for leaks, test the hot water by turning on the faucet.
Conclusion
Congratulations! You have successfully changed your gas hot water heater. In this article, we provided you with a step-by-step guide on how to change a gas hot water heater. Remember to follow safety precautions when handling gas appliances and consult a professional if you have any doubts.
At Reviews AZ, we understand the importance of having hot water, and that’s why we strive to provide you with the latest tips on how to maintain and upgrade your home appliances. Stay tuned for more informative articles on technology and lifestyle.