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Decreased Water Pressure

19 days ago

Our house was built in 1996 and we are on City water. Any time we run the washer, our water pressure drops significantly throughout the house while the dish washer and flushing the toilet also drops the pressure a bit. I've had a plumber come out to locate our pressure reducing valve (PRV), but he was not able to find it, so it's possible that we don't have one despite neighbors on our street do. Is this normal for water pressure to drop so much? If not, what could be the issue if we do not have a PRV...narrow water lines within the house caused by corrosion or too small of lines? TIA!

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