water pressure drop

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water pressure drop
Author: md20201 (NC) I have a house on a slab 3/4 copper in. When one fixture is open the pressure drops in the next fixture as commode flushes shower drops etc. In pressure from the street is 90# I know it needs to be lower but my question is will a PRV help regulate the house pressure. Owner wants to know I'm not sure the answer. Thanks Mark.
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Re: water pressure drop
Author: North Carolina Plumber (NC) There is a restriction in the piping somewhere, clogged water filter, clogged screen on the pressure reducing valve, faulty main water valve, etc. Just adding a reducing valve will not correct the problem.
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Re: water pressure drop

Author: srloren (CA)

You should install a pressure regulator to get the house pressure below 80 PSI. But you may have another problem with the sizing of the copper installation. Possibly they reduced to 1/2" too soon and you are not getting enough volume through the pipes. If the piping is sized correctly you will not see the pressure drop so much. Another thing you should consider, if the piping is under the slab, you may want to repipe above the ceiling to prevent having leaks you would be unaware of. Do you have an attic to repipe into?

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