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  1. #1
    Join Date
    Apr 2010
    Posts
    2

    Default Water & Expansion Tank Pressures

    What is the suggested water pressure in a house with all spigots off? My gauge reads 58-65 psi. Should I screw down the pressure reducing valve some? What should I air up a new expansion tank bladder to before installing it? Should the psi in the bladder be a little more or less or right at the average static psi?

  2. #2
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,836

    Default Re: Water & Expansion Tank Pressures

    Generally speaking you want the pressure to be below 80 lbs.
    A bladder tank should be precharged to 2 lbs less than the on pressure of the pump switch.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  3. #3
    Join Date
    Apr 2010
    Posts
    2

    Default Re: Water & Expansion Tank Pressures

    Thx Jim. I am on city water rather than a well. The expansion tank bladder refered to is the tank used to compensate for the increased system presure due to hot water expansion. The system is closed in that it has a check valve in the line from the city. Any change on your thoughts?

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