Water line setup

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Antiphon

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Hi, new here.
I’m remodeling my father in-laws house and just turned the water on. We have a 1” meter, followed by a new 1” rpv (15-75psi), then a 500’ 1.5”PVC line that transitions to 3/4” PEX at the house. The water pressure in the house is 82psi but when the hose Bibb is turned on the pressure drops to 15psi.
My thought is the rpv needs to be relocated to inside the house, is this correct? Or is there another issue?
 

Reach4

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I think you mean PRV -- pressure reducing valve.

If the pressure out of the water meter is under say 140 psi, then locating the PRV in the house would be best.
 

John Gayewski

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The prv should be adjusted to give the house all of the volume and pressure it needs. If the prv cannot be so adjusted it likley needs to be resized to an appropriate size.
 

Jeff H Young

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something is going on it should push water through 1 1/2 without all that drop to 15 psi. but id moove the regulator to the the house you get a little freezing weather there so thats the only concideration I cant tell you where a basement is one idea though
 

Reach4

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something is going on it should push water through 1 1/2 without all that drop to 15 psi. but id move the regulator to the house you get a little freezing weather there so that's the only consideration I can't tell you where a basement is one idea though
Agreed. Maybe there is a screen in the PRV that is clogged.

If the pressure at the meter is over 140 psi, two PRVs could be useful.... one to reduce the pressure to maybe 120 before the PEX, and one at the house to bring the pressure down to maybe 60 psi.
 

Jeff H Young

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there is a problem I personally dont think in this case its the location of PRV that is the issue . I thought about 2 regulators as well 1 1/2 sch 40 pvc is rated at 330 psi seems like its safe to run whatever number he comes up with 100 or even 150 PSI ?
clogged screen rocks in the piping something sounds wrong . I just had a guy replace his water main to the house it was short like 60 feet had only 3/4 inch we ran new 1 1/4 line but it didnt really help because the city had 3/4 inch galvinized coming off the main in street to the curb stop and its rusted really bad . so he has great pressure , no volume, and extreme pressure drop
 
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