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Thread: Sudden Drop in Water Pressure

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  1. #1
    DIY Member Phillbo's Avatar
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    Default Sudden Drop in Water Pressure

    A couple days ago I notice a significant drop in my water pressure. I've tested for a leak and don't appear to have one. I don't believe I have a pressure reducing valve that could be failing either.

    Looking for advice on what else to look for?

    I plan to ask a neighbor if they have the same problem next time i see them.. We are on City Water, should I call the city ? Will they charge me to come diagnose?

  2. #2
    Master Plumber-Gas Fitter shacko's Avatar
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    Quote Originally Posted by Phillbo View Post
    A couple days ago I notice a significant drop in my water pressure. I've tested for a leak and don't appear to have one. I don't believe I have a pressure reducing valve that could be failing either.

    Looking for advice on what else to look for?

    I plan to ask a neighbor if they have the same problem next time i see them.. We are on City Water, should I call the city ? Will they charge me to come diagnose?
    I think you have to make sure you don't have a PRV in your system.

    Whether the city will charge you depends on where you live, they are all different

    Get yourself a screw on pressure gage and check the pressure on the nearest hose bit to your meter or supply line, if you are getting over 50lb it's not the cities fault.

  3. #3
    DIY Member Phillbo's Avatar
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    The valve to turn the water off to the house (other than at the meter) is on the front hose bib, there is no other valve located there.

    I'll get a pressure gauge and see what i have at the hose bib at the front of the house.

    Thanks for the advice.

  4. #4
    DIY Member Phillbo's Avatar
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    Must have been a city issue since the pressure returned to normal yesterday. I bought a gauge anyway and am getting 60 psi at the front hose bib.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    Water pressure can change consisderably throughout a 24-hour period. In the morning, when everyone is taking showers, and again in the evening. At night, the pressure often goes up while they may be trying to replenish any water towers, plus few people are using water. So, a single check often can be misleading.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    Moderator & Master Plumber hj's Avatar
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    IT would have to be a "horrendous" leak to create a pressure drop that you would notice. You would have a easy time seeing or hearing it.

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