How To Install Expansion Tank On Gas Water Heater? 6 Easy Steps!

Do you want to know how to install expansion tank on gas water heater? If you answered yes, stick with us to the finish; you’ll discover everything as you go deeper into this article!

When you request permission to install a water heater, you’ll know about any expansion tank regulations. You can install one in the home now after understanding what size water expansion tank your system requires. The method, however, does not need any efficient techniques. You can do it easily just by using a few pieces of equipment.

how to install expansion tank on gas water heater

However, you must first get the tank from a retailer. A little model costs as little as $40, but bigger ones cost several more money. Purchase a 2-gallon expansion tank if you’re going to use it with a 40- to the 50-gallon water heater.  To secure the expansion tank, choose a 3/4 threaded connector. You’ll need to install a tee connection over your hot water system for a flawless fit. Here are the procedures for installing an expansion tank for your water heater. So without further ado, let’s get started!


Steps To Install Expansion Tank On Gas Water Heater

A tee-fitting inserted in the cold water supply line is typically used to install an expansion tank right above the water heater. It is generally erected vertically, but for a little space, it can also be installed horizontally. Below we’ve discussed step by step detailed guide for you that will assist you in figuring out how to install expansion tank on gas water heater:


Step #1. Turn off the supply of gas and water 

Turn your water heater’s gas and water supply off. Cut off the flow of water from the supply line to your house if your appliance is linked to a piping system with a shut-off valve. Turn off the breaker if your equipment runs on electricity. Turn off the supply of gas if you’re using a gas hot water system. If you’re unsure how to accomplish this, find your nearest gas company for help.


Step #2. Purchase expansion tank accessories

Looking for an expansion tank that will work with your water heater? Before purchasing the tank, note your water heater’s size. You must carefully check your water heater size after you’ve arrived at the hardware shop. For making a tee fitting, Ensure you have enough plumber’s adhesive on hand; nuts (1 ½ In.) and installation hooks are also included.


Step #3. Check the cold water supply line 

Go over to the cold water supply and identify the one that runs parallel to the hot water system. To access the machine, you’ll have to use this cold water supply. You may also be interested to know about cold water supply and components.


Step #4. Install the expansion tank 

To keep the unit near your water heater, install it over the pipeline that distributes cool water. Cut holes for the attachment pipes in a designated area on the wall. Connect the supply line of cold water and screw in the expansion tank. Attach a short piece of linear copper pipe to the tee-side fitting’s outlet with push-fit connections and sweat-soldering. The copper pipe’s length will be determined by the amount of free space, but it should be kept as brief as feasible; make sure it’s not larger than 6 inches. Use a push-fit attachment to attach a female threaded adaptor to the horizontal pipe’s tip.


Step #5. Connect the expansion tank pipe

On the expansion tank, around the threaded fitting, wrap the pipe sealing tape before screwing it onto the horizontal pipe’s threaded adapter. Tightening by hand is usually adequate; however, avoid over-tightening, which might harm the pipelines or couplings.


Step #6. Reconnect the heater’s water and gas supply 

Make sure your heater’s water supply is on. After that, turn on the breaker to power up the machine. Restore the supply of the gas line and switch on the gas if you have a gas-powered water heater. 


How Can I Tell If Expansion Tank Is Working?

Assume that a diaphragm separates the water from the air in the expansion tank if it’s at the tip of a cold water supply pipe. Strike the expansion tank’s upper and lower sections gently. It’s in fine shape if the tank appears empty.

A thud, on the other hand, indicates that water has entered the upper room as a result of a broken diaphragm. Control the temperature by touching the middle and bottom parts of the tank. As it holds hot water from the tank, the bottom half may typically stay hot because it keeps cold air in the top section; you may experience cool. Water will drop through a TPR valve if the hot water system tank is under excessive pressure due to a malfunctioning expansion tank; in this case, you need an expansion tank.


It’s A Wrap!

We were glad to know that you all will understand how to install expansion tank on gas water heater. These are the steps mentioned above that are involved in installing the expansion tank. Read the article carefully to understand it well. Because installing an expansion tank is not very simple, you must have complete knowledge. Don’t hesitate to know these things too; read about how to drain and flush a gas water heater and how to check water heater elements. Thank you, friends, for being with us at the end!

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