What Is This Tank? How to Replace and Maintain a Water Heater Thermal Expansion Tank

Great job. I like this very much, very helpful. Keep up the good work

This guy's kindness is evident by his demeanor. Instant credibility.

I am impressed how you get to the solution no time wasted with "useless comments" and how you cut unnecessary footage. Thank you.

Great video. I just replaced mine tonight and your tips really helped. This was the best full instructional video I found. Thank you for the step-by-steps and for saving me hundreds!!

Thank you my friend. I was worried that this was gonna be a licensed plumber fix. Therefore a ridiculous price. So relieved it's a DYI! Thanks again

Finally a COMPLETE and quick video!! Thank you brother!!

I've been a plumber for 45 years and that was very entertaining and good information and that is been around new Compared to what I do Thanks for the info

We did it!! Thanks to you my husband and I just did this repair and saved over $400. You are a great teacher - thank you!

First of all, a HUGE THANK YOU for your video and your thorough explanation on the expansion tank. You saved me a few hundred dollars because I had an issue with a leaking pressure valve. I thought it was the pressure valve, so I replaced it and the leak continued. I thought it might be the thermostat on the water heater and it was overheating the water and causing the pressure relief valve to open up. I also checked into the water pressure, 80psi and I called the water dept and verified that it wasn’t high since most places are around 60psi. They told me that they run around 85-100psi, normal pressure for their system. I’ll probably add a regulator later, but I checked the expansion tank’s Schrader valve and water came out! I replaced it and filled the air pressure to 80psi. The old tank had rusted through on the tank’s 3/4” nipple and I doubt the plumber added the correct pressure either. But to make a long story short, you helped me by saving me money and if a “like” and “subscribe” is enough to say thank you, I’ll do it in a heartbeat.

Great job explaining the thermal expansion tank Sir, you just save me quite a bit of money. Thank you

Everything a content creator should be. Top marks on the video quality, explanation, knowledge, and presentation. The links are a great addition and also helpful. Subscribed due to this content provider.

This is a very good introduction to water heater expansion tanks. After watching this clip, I now realize that my system is running on the ragged edge; i.e., the electric water heater AND expansion tank are 15 years old!

You did a fantastic job with your explanation! It was simple and right to the point. Thank you! Took me back in time to when I used to watch Mr. Rogers and he would take us on a field trip in the neighborhood, and explain the occupation of the person he was visiting. You have a clear and soothing voice. Thank you and God bless 🙂

Thanks for your thorough video. I actually discovered that our tank was faulty (spouted water when tested) while trying to troubleshoot some really high pressure in our system (which I began to suspect because we were having all sorts of valve and cartridge failures around the house). At first I thought we just needed a pressure-reducing valve and got one installed, but we still had high pressure. Some more research indicated that the expansion tank might be the problem, and so then we got a new one installed. In my research, I had seen that the tank's pressure needed to be equalized with the house pressure, so I asked the plumbers whether they had done so and they said, "no, it comes pre-set" (to 20 PSI). Well, I knew that was an issue, read the instructions that came with it, and verified the proper procedure. So here's my point: The house pressure would sometimes get over 100 PSI. Measuring the "house pressure" would then indicate that the tank needed to be set to this, which I know was too high. I let the water run for a bit to reduce the excess pressure, then measured 45 PSI. I ended up redoing part of their installation then by doing what you first showed in this video - turning off the water, releasing any pressure, adding some air to make it 45 PSI, and then turning everything back on.

I did mine 2 months ago ( complete water heater and expansion tank ) and didn't know about trick you use to hold the tank. Will be doing this very soon. Thank you for a great video.

Very informative! Thanks. When I purchased my home I was clueless what this was. Came home tonight water was on floor. I will test and get back with you. Thanks again for information!!

Watching this made me comfortable enough to install my own expansion tank. Thank you sir.

Excellent directions. Thanks so much! My expansion tank took a while to empty after I dumped off a few gallons from the heater. I could hear the burbling, so I just waited until it stopped to ensure it was empty. Just a helpful point to ensure you don't have spillage when you remove the old expansion to tank.

Extremely helpful...probably saved me a good couple hundred dollars doing it myself as opposed to a Plummer.

I had a water heater emergency with the expansion tank. With an hour to spare I got a replacement at Lowes and with your video was able to make a great repair.....thanks for all the information!!