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Why on Earth

Tim_33
Tim_33 Member Posts: 83
in THE MAIN WALL
There are many reasons that I have heard folks come up with over the years, but none of them are right. There are plenty of reasons NOT to have a check in this location, all of them good. Fact is, a check valve in the connection between the expansion tank and the system serves only an "indicator". It indicates the installer knows not what they do.

Comments

  • Eddy
    Eddy Member Posts: 21
    Is there any reason

    to have a swing check in the line between the expansion tank and HW loop? It seems to me that would cause all kinds of problems.
  • Josh_10
    Josh_10 Member Posts: 787


    Well... Being as the expansion tank must work both ways (expanding then contracting) I would say that a swing check valve has no use and is a hazard.

    Just my thoughts..

    Josh
  • Ricopp
    Ricopp Member Posts: 25
    swing check

    A few times I've installed a swing check and a PRV between an expansion tank and the system piping. Of course this expansion tank was being used as a charging station for glycol in a SIM system. Now, to the untrained eye it might appear as though the installer had made an error... this is not to say your eye is untrained "Big J" :)... I've made my share of errors O ya!!
    All the best to everyone/
This discussion has been closed.

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