Do i need an expansion tank ?


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Old 12-31-17, 05:36 PM
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Do i need an expansion tank ?

I replaced the old 11 yr old Bradford White water heater recently. I would like to ask if i need to put in an expansion tank or not ? I'm not sure if i have the space to add it though...

Thank you.
 
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Old 12-31-17, 05:57 PM
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Welcome to the forums.

I'm not sure if an expansion tank is an automatic installation or on an "as needed" basis. If you have a pressure regulator valve on your main water supply...... you need a tank as you have a closed loop water system where the excess water pressure cannot be sent back out to the city main. It doesn't necessarily need to be right at the tank. It can be in the cold water line between the PRV and the water heater.
 
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Old 12-31-17, 06:17 PM
J
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Has there been issues?
No location in your profile so no clue what your local codes call for.
I own three houses and not one has an expansion tank.
 
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Old 01-02-18, 01:20 PM
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No pressure problem or other issues . I'm in Phoenix Arizona

The old water heater was installed around May 2007. It had no expansion tank or sediment trap. I'll add a sediment trap later (online order item only). I'm not sure on the expansion tank.
 

Last edited by CluelessOwner; 01-02-18 at 01:36 PM.
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Old 01-03-18, 06:07 AM
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Short answer Yes.

Each new tankful of water expands when heated. If there is no expansion room anywhere in the system then the expanding water could bow (bulge) the sides of the water heater tank possibly cracking the glass or porcelain lining.

It is okay to have some pipe between the expansion tank and the tee-in to the water line if there is no space just a few inches above the water heater.
 
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Old 01-05-18, 04:35 PM
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I asked both the gas guy and the Rheem's contractor. They said i don't need one. I guess it's not required for this area.
 
 

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