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Checking water pressure...

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  • Checking water pressure...

    the right way.
    I just got back from a mainline rodder job. While I was there the Customer asked me about expansion tanks. It seems that a local plumber is having a field day installing expansion tanks in this particular neighborhood. I checked my Customers pressure and it read 55psi and the water had not been used all day. I told him that pressure can change throughout the day, but typically it's consistent throughout a local neighborhood. He's never had any problems H2O pressure related.

    This started me thinking about checking water pressure. I use a pressure gage at the hose bib and that's pretty much it, because that's all I know. Is there a more reliable or definitive way of checking pressure?

  • #2
    Re: Checking water pressure...

    Check to see that no water is running anywhere; a look at the water meter dial will determine this. Then check at hose bib with a reliable gauge. they do go bad and give false readings. Late evening tests will be higher that daytime tests.

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    • #3
      Re: Checking water pressure...

      Is this guy installing expansion tanks due to the pressure or due to closed water systems?(back flow applications)

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      • #4
        Re: Checking water pressure...

        There are a number of reasons to install an expansion tank, and it's not all about static pressure. Is there a check valve on the city water? As a water heater heats, it expands and if there's a check valve there's no place for the water to go, leading to an increase in pressure.

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