Originally Posted by joecaption
There sized acording to the pipe size.
Any more then 60 PSI I is hard on the plumbing and the flush valve in the toilet.
Read some of the old post about water hammer, toilet noises, leaking plumbing caused by the pressure being to high.
I've got all the symptoms you describe. All three toilets have to be rebuilt because they run. Nearly every valve in the house leaks or drips at the faucet. The outside hose bibs drip too. Supposedly a PRV was installed a couple of years ago but I was at the main line over the weekend (turning off the water to replace leaking faucet valves) and never saw it.
Originally Posted by TheEplumber
Per UPC, the maximum house pressure is 80psi. So you want a PRV in that range. Although they come preset, most if not all have a method to set the pressure.
They are available with or without strainers- warranty is void without a strainer installed.
I would install a tee and valve on the street side of the PRV and filter for future irrigation.
Also, consider putting a pressure gauge on the house side of the PRV- maybe even both sides of it.
In regards to future plans for irrigation, particularly in conjunction with softeners - is the common practice to cut and cap hose bibs after a house has had a softener installed and then use the new irrigation line to feed exterior (raw) hose bibs?