gas water heater

How to Install a Gas Water Heater: A Step-By-Step Guide

Installing a gas water heater is a straightforward process that anyone with basic plumbing skills can do. However, there are a few things you need to know before you get started. This article provides a step-by-step guide to help you install a gas water heater in your home.

Step 1: Shut off the Gas:

Shut off the gas supply to your water heater. The shutoff valve is usually located near the bottom of the tank, but it may be on top or side. If you’re unsure where it is, check your home’s manual or look for an identifying sticker on the side of the tank.

Step 2: Get the Right Water Heater:

Gas water heaters come in three sizes: 15, 20 and 30 gallons per hour (GPH). The GPH indicates how much hot water you can expect from your heater at full load. For example, if you have a family of four and like to take long showers in the morning and evening each day.

gas water heater

Step 3: Install the Seismic Restraints:

Most homes built after 1978 have seismic restraints installed to prevent damage during earthquakes or other disasters. If your home does not have these restraints, they can be purchased at any hardware store or home improvement centre.

Step 4: Attach the Cold and Hot Water Lines:

The next step is to connect the cold and hot water lines to the gas water heater. You can attach these lines using compression fittings or sweat fittings. For compression fittings, you need to use a pipe wrench and tighten them as much as possible.

Step 5: Install the Drain Pan:

After you’ve connected your cold and hot water lines, you’ll need to install a drain pan underneath your new gas water heater. This will collect any leaks or spills during operation and make cleanup easier.

Step 6: Reattach the Gas Line and Test It for Leaks:

Once you’ve attached all your water lines and hot water installations of any venting ducts, you can reconnect your gas line and test it for leaks. First, check that there are no leaks in any of your joints by applying soapy water over them. Next, turn on your gas supply valve at its shutoff valve; if no bubbles are coming from any of your joints, you’re good to go.


It’s important to follow these guidelines when installing a gas water heater to have the safest possible installation. Remember that consistent and safe hot water is what you should be going for, so following these steps will help ensure that you get it.

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