My water pressure at the hose bib is at 85psi and from what I am told fluctuates quite wildy during different times of the day. My house is only 2 yrs old but I live outside the city limits and their is no requirement to have one installed, so the builders did not put one in. The water meter and shutoff are located underground. I know mostly everyone says to install a prv as close to the shutoff and meter as possible but it sounds like such a bear to install. How would I even be able to access the valve when repairs or adjustments are needed if it is underground? Can I install it closer to the house where it is not underground? The plumber I called is quoting me around $800 for install/materials of prv and water expansion tank, and I don't want to spend that kind of cash when I know I can do it myself.