Comments on: Handling the pressure with expansion tanks

By: siaosi

siaosi — Tue, 21 Feb 2017 18:16:42 +0000

I would like to make sure that I have a tank that is long lasting, I want to have a tank that can take a lot of pressure. I want to make sure that the tanks are well known as well.

By: Sharon Reams

Sharon Reams — Tue, 03 Jan 2017 07:07:30 +0000

Great post! Thanks for sharing the handling ways of pressure with expansion tanks.

By: Andre

Andre — Tue, 03 May 2016 18:26:37 +0000

Good info! I have a Noritz N-0751M tankless gas water heater. When I turn the hot water faucet in the kitchen on and off I get loud banging in the pipes. I installed an arrestor in the kitchen, but the banging is still there. Someone suggested to install a thermal expansion tank. I have been searching the Web for installation instructions with tankless water heaters, but found nothing! On what side does the tank have to be installed: cold or hot side? Any help is appreciated.

By: Dave

Dave — Tue, 26 Apr 2016 19:00:59 +0000

We have a backflow preventer, thermal expansion tank and pressure reducing valve setup as part of our gas fired forced hot water heating system. The pressure reducing valve started leaking and a plumber came out and replaced it. Initially the leaking stopped but it started leaking again several hours after he left. He came back a second and third time replacing the expansion tank and backflow preventer only to have the problem resurface within a day.

He says it is due to the pressure building up which is either due to the hot water tank putting back pressure to the system or one of the components he replaced is defective.

I have used this plumber before and never had reason to question his work but I feel he is just guessing now and it is getting expensive. Any guidance is appreciated.

By: Guy

Guy — Mon, 15 Feb 2016 01:38:50 +0000

Have some respect. Also using complete sentences and proper grammar would be helpful in understanding your post.

By: Anon

Anon — Tue, 26 Jan 2016 03:35:56 +0000

Yes, your pressure will be wrong. Disconnect and repressurise.

By: Anon

Anon — Tue, 26 Jan 2016 03:33:58 +0000

There is always at least a main supply valve and a tap. Turn off the water supply and open a tap to let the pressure go. Then check the expansion tank's pressure.

By: Scott Waschlerner

Scott Waschlerner — Wed, 13 Jan 2016 10:38:08 +0000

Hi! I wish you can help me with my problem. 2 years ago we changed heating pipes in our house and right now not all of them give warmth. We bought good pipes, it was obbo electrical-components.com/obo butthe problem is that it was nested at the wall and to look on it we should damage it. Can you tell me is any other ways to check it, the other assumption is that there is a cork inside pipes!What can I do with my problem! Help me, please....

By: michael

michael — Fri, 06 Nov 2015 22:29:26 +0000

author youre an idiot expansion tanks do not absorb excess pressure from city water for that to happen water would need to be able to be compressed not gonna happen cause physics.however in a closed hydronic heating system water can not leave the pipe to enter the tank or vice versa because that would imply a vacuum again physics. in fact a compression tank in a heating system is actually the "point of no pressure change" now when heated water can expand volumerically and the tank allows air to be compressed tp absorb this thermal water expansion which also keeps the pumps from cavatating and air from building up which destroys plumbing. in your separate potable water the pressure tank serves other purposes like storage to prevent pump cycling etc

By: johan

johan — Fri, 30 Oct 2015 13:43:43 +0000

ka boom