Written by Amanda Casteel · COO Reviewed by Johnny Casteel · CEO · Master Plumber Updated 2026-07-17 VA Plumbing Lic. 2710075081 · Contractor Lic. 2705180998
What actually moves the price
Access at the main
Meter pit, basement entry, and pipe condition around the shutoff decide labor.
Package with main shutoff
Often done together — ask us to quote the pair when the existing valve is seized or aged.
Expansion tank pairing
A PRV creates a closed system — budget an expansion tank so the water heater isn’t the relief valve.
How to read a quote
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PRV / main shutoff valve
$650 – $1,400 installed
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Pressure test
Included with every plumbing inspection
Prefer a service page first? Open the matching bookable service · NoVA plumbing costs hub · Free second opinion.
FAQs
Why do I need a PRV?
Street pressure above 80 psi shortens water heater and fixture life and can void appliance warranties. See our water pressure guide.
What PSI should I target?
About 50–60 psi whole-home after the PRV.
Where do you serve?
Arlington, Alexandria, Fairfax County, and mapped MD/DC corridors. Confirm your address when you book.
Want a real number for your home?
Call (703) 214-2551 or request service — we diagnose first and quote flat-rate before work whenever the fault is clear.