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    Mark Boser's Avatar
    Mark Boser Posts: 2, Reputation: 1
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    #1

    Jul 11, 2012, 10:02 AM
    Testing hot water tank Pressure PSI
    How do I test proper psi for a hot water tank?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Jul 11, 2012, 10:10 AM
    You can buy a test gauge with a garden hose fitting at HD, Lowe's or other source. Screw it onto the HW drain and slowly open the drain. Should be 45-65#. If higher or lower than that, you should adjust the PRV for the house, with water running . If too low, screw the bolt down and if too high, screw the bolt out.
    Mark Boser's Avatar
    Mark Boser Posts: 2, Reputation: 1
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    #3

    Jul 11, 2012, 10:17 AM
    Quote Originally Posted by ma0641 View Post
    You can buy a test guage with a garden hose fitting at HD, Lowes or other source. Screw it onto the HW drain and slowly open the drain. Should be 45-65#. If higher or lower than that, you should adjust the PRV for the house, with water running . If too low, screw the bolt down and if too high, screw the bolt out.
    Thank You!
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #4

    Jul 11, 2012, 10:44 AM
    Great answer ma, hot psi should be the same as cold psi unless you have a backflow prevented. The same test could be done on the garden spigot on the outside of the home. Does you house have a pressure reducing valve (prv)?
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