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Expansion Tank for Water Heater

Discussion in 'Plumbing Codes' started by jar546, Nov 28, 2019.

  1. jar546

    jar546 *****istrator

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    Do you agree with his opinion?
    The opinion kicks in towards the end after the 10 minute mark.
     
  2. ICE

    ICE Sawhorse

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    I disagree with the willy-nilly installation of an expansion tank. I have corrections for the furnace.

    Minute 1:35 is a blast.

     
    rgrace, fatboy and mark handler like this.
  3. mark handler

    mark handler Sawhorse

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    Thank for posting, that was cool
     
    jar546 likes this.
  4. fatboy

    fatboy Administrator

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    I actually watched that episode of myth busters......flippen cool.

    The expansion tank, not until you have a check valve in the system somewhere. Some water providers require a incoming check valve, so yes, need the tank, otherwise...not....
     
  5. jar546

    jar546 *****istrator

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    So far for me, every single municipal water company in every jurisdiction, in every state I've worked in required a backflow preventer for the house so I am not sure where an expansion tank would not be required.
     
  6. fatboy

    fatboy Administrator

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    Well.........not here.

    Been the single source water provider for over 140 years.
     
  7. fatboy

    fatboy Administrator

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    And without a check valve ahead of the premise, pressure tank would not be required.
     
  8. Inspector Gift

    Inspector Gift Sawhorse - Made in USA

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    Our City water meters have internal check valves, in addition to high water pressure that requires PRVs at most homes. Yes, expansion tanks are essential.
    Last month during the initial the final inspection of a show home in a new development, We noticed that there was water on the garage floor coming from the water heater. And Yes, it was due to high pressure (123#). The plumber had failed to install a PTR valve and an expansion tank. The plumber installed both and the problem was corrected.
     
    jar546 likes this.
  9. ICE

    ICE Sawhorse

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    Well what with Florida being at the bottom of the country I suppose that the water pressure would be up there.
     
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