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Thread: water to home is shutting off randomly

  1. #1
    DIY Junior Member mrsymo's Avatar
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    Default water to home is shutting off randomly

    Help! Is this a failure of the pressure reducing valve? From the street to my house is the cities water meter, a ball valve, then a Watts M55b M1 pressure valve. Every couple of days, the water supply to my home shuts off. Usually, I can open a faucet, go to the meter, and cycle the ball valve and the water will begin to flow again. Occasionally that doesn't work, but if I open the union in the line enough that water sprays out, then cycle it again, it will work. I'm beginning to think that I'm the first person in the world that this has happened to!!!

    Thanks,
    Mike

  2. #2
    Moderator & Master Plumber hj's Avatar
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    It is somewhat irrational, because normally, if the PRV valve fails, it fails permanently, so we cannot be sure what is happening without being there to actually test it ourselves.
    Licensed residential and commercial plumber

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    How old is the house? What kind of pipe is run from the street into the house? There could be some debris in the pipe, and it occasionally gets caught just right to block most of the flow. Or, it could be galvanized iron pipes, and the internal diameter is highly restricted because it is rusting from inside out. Lots of things possible.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    DIY Junior Member mrsymo's Avatar
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    Quote Originally Posted by jadnashua View Post
    How old is the house? What kind of pipe is run from the street into the house? There could be some debris in the pipe, and it occasionally gets caught just right to block most of the flow. Or, it could be galvanized iron pipes, and the internal diameter is highly restricted because it is rusting from inside out. Lots of things possible.
    The house was built in 1988. Its 3/4 inch copper running from the valves to the house. I'm going to replace that valve and see if it fixes it. It's in a great location...the guy who built the house (did everything himself...lot's of not so cool surprises..) put the valve in line then built a concrete block fence directly on top of it, so not a whole lot of space to work in...and digging in AZ isn't the easiest labor in the world!

  5. #5
    Moderator & Master Plumber hj's Avatar
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    quote; and digging in AZ isn't the easiest labor in the world!

    It isn't in the heat, but you should not have to dig down 42" like you would if you were "up North". We usually install the PRV at the house where it is above the ground, not at the meter.
    Licensed residential and commercial plumber

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