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Old 09-07-2008, 08:42 AM   #1
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Closed system ?


First post here. My name is Phill from Central Mass.

For the purpose of installing an expansion tank for an electric water heater, is a well system considered "closed"

Well pump fills the holding tank (diaphram type), runs through whole house sediment filter, and then to house.

Heater will be six - ten feet from holding tank. It is a 40 gallon heater.

Old heater did not have one.


thanks.

Phill


Last edited by Phill; 09-07-2008 at 08:45 AM.
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Old 09-07-2008, 12:54 PM   #2
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Closed system ?


If expansion tanks are in your local code, you will need to install one since you are repalcing an old heater. I have enclosed a link (just click on the link) that explains what they do. Good luck.

http://www.fastwaterheater.com/faq.asp#3

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Old 09-07-2008, 01:22 PM   #3
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Closed system ?


Quote:
Originally Posted by majakdragon View Post
If expansion tanks are in your local code, you will need to install one since you are repalcing an old heater. I have enclosed a link (just click on the link) that explains what they do. Good luck.

http://www.fastwaterheater.com/faq.asp#3
Thanks,

I understand the reasons.

but this is what causes my question:

"Expansion tanks are also required by state code if your system is closed in most of the states we work in."

The well pump tank is a bladder type with no check valve (check valve on the well pump in the well)

So I wonder if my system is "closed" .
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Old 09-07-2008, 02:43 PM   #4
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Closed system ?


I may be wrong but I would consider it as a closed system. There would be no place for expanding air and water to go except back to your tank. This could cause some problems. Not enough pressure to trip your T/P valve but enough to cause undue pressure on the system.
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