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Home Water Pressure Drops Significantly

Posted on 12/27/19 at 11:07 am
Posted by Forkz
Member since Jan 2013
217 posts
Posted on 12/27/19 at 11:07 am
My home's water pressure drops substantially (from ~60 PSIG to ~15-20 PSIG) when I turn on a single point of use (shower, washing machine, toilet, etc.). I checked the pressure at a hose bib connection which tee's off from where the water enters my house.

I live in the Capital Heights area but the house was built somewhat recently (around 2000). I spoke to my neighbors and they do not seem to have the same issue.

My first though is maybe roots or a pinched line from the street to my house? The water company has changed out my meter already. It's 1/2" copper piping as far as I can tell. I've thought about putting in a new 3/4" line from the street. Thoughts?
Posted by Floating Change Up
Member since Dec 2013
12835 posts
Posted on 12/27/19 at 11:41 am to
Does the water kind of pulsate?

Between your water meter and where the main runs into the house, you should have a pressure regulator valve. Usually buried a foot or two from either your water meter or from your house. If that valve goes out, it defaults to reducing pressure. They typically last about 12 - 15 years.
Posted by keakar
Member since Jan 2017
30152 posts
Posted on 12/27/19 at 12:03 pm to
check the outside faucet and see if its the same there, if it is then shut off the water at the meter and remove the stem and shaft from the shut off valve where it enters the house. then open the water meter valve and see if there is any pressure drop.

in most cases the shut off valve gets blocked or the seal gets stuck keeping it from opening all the way. the line builds pressure but as soon as its opened it cannot maintain pressure due to it being restricted
Posted by Forkz
Member since Jan 2013
217 posts
Posted on 12/27/19 at 3:33 pm to
I see...it might be worthwhile to just change out the shutoff valve completely, just to be sure. Thanks!
Posted by keakar
Member since Jan 2017
30152 posts
Posted on 12/27/19 at 4:54 pm to
quote:

I see...it might be worthwhile to just change out the shutoff valve completely, just to be sure. Thanks!

try to find the same brand and valve, if you can all you have to do is shut off water at meter and unscrew the nut and the whole innerds come out so you just put the new one in and dont have to replace the valve itself or mess with connections
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