thermal expansion tank on water heater

Over 698,000 strictly plumbing related posts

Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:

Post New

How to Show Images

Newest Subjects

thermal expansion tank on water heater

Author: donnagag (DC)

Just had a thermal expansion tank installed along with a new water heater. The tank is installed next to the pressure regulating valve(pressure was 93), which is next to the backflow valve, all on the house side next to the meter. I thought it would be next to the water heater. If water enters and leaves this tank it could recirculate to the kitchen faucet, etc - could it somehow contaminate that water? If it is right next to the water heater on the cold pipe there is no chance for it to mix with the cold kitchen water as it would just go back into the water heater. Maybe just worrying about nothing.
Thanks

Post Reply

Re: thermal expansion tank on water heater
Author: North Carolina Plumber (NC) The tank is designed for potable water so there's nothing to contaminate your water. The water will enter and leave the tank as the pressure builds and subsides with the thermal expansion due to the water heater.
Post Reply

Re: thermal expansion tank on water heater
Author: SHEPLMBR70 (VA) THERMAL EXPANSION TANK SHOULD BE INSTALLED ON COLD SIDE OF WATER HEATER
Post Reply

Re: thermal expansion tank on water heater
Author: hj (AZ) It is AFTER the water meter, which by definition IS ahead of the water heater.
Post Reply

Re: thermal expansion tank on water heater
Author: SHEPLMBR70 (VA) So I'm right
Post Reply

Re: thermal expansion tank on water heater
Author: hj (AZ) You are right, but then, WHY did you post your reply in all caps, as if the original installation was incorrect and should be changed?
Post Reply

Re: thermal expansion tank on water heater
Author: SHEPLMBR70 (VA) Just forgot to turn them off...
Post Reply

Please note:

Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:

Plbg Advisor List Common Plumbing Terms Find A Plumber Plumbing Manufacturers Directory theplumber.com

Special thanks to our sponsor:

to FAQ's - to popular subjects - to plumbing books - to Tankless 101 - to plumbing history - to helping charities - to contact us