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Faucets that blast, pipes that whistle or bang, a water heater relief valve that drips, toilet fill valves that keep failing: in a lot of Exton homes the root cause is the same. House water pressure is too high, and the pressure reducing valve (PRV) that’s supposed to control it has worn out. Golden Rule Plumbing replaces pressure reducing valves throughout Exton, Lionville, Eagleview, and the rest of West Whiteland and Uwchlan Townships for $475 to $625, and that number includes the new Watts valve, labor, tax, and the trip. We confirm your actual pressure with a gauge before we replace anything. If the PRV isn’t the problem, we’ll tell you.
Ask about pricing when you call. A range for most jobs, often a firm number from photos.
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The water main in the street often runs at 100 to 150 psi or more. Your home’s plumbing, fixtures, and appliances are designed for 50 to 70 psi, and Pennsylvania code caps it at 80. The pressure reducing valve, a bell-shaped brass fitting near your main shutoff or water meter, is what brings the street pressure down to something your house can live with.
PRVs are mechanical. Inside is a spring, a diaphragm, and a seat, and after 10 to 15 years of constant work they wear out. Sometimes the valve fails open and pressure creeps up slowly over months, which is why the symptoms are easy to miss. Sometimes debris in the seat causes the pressure to swing. Either way, everything downstream pays for it: water heaters and expansion tanks fail early, relief valves start dripping, supply lines and faucet cartridges give out, and copper develops pinhole leaks. A $475 to $625 valve is a lot cheaper than the fixtures it protects.
A like-for-like PRV swap is one of the few jobs we can price almost exactly over the phone. Ask when you call. If your valve is in an unusual spot, there is no shutoff ahead of it, or the piping around it needs work, we will tell you what changes before anyone picks up a wrench.
Exton is almost entirely on public water, and the townhome and single-family communities around Eagleview, Lionville, Whitford, and Exton Square were largely built between the mid 1980s and the 2000s, which puts their original PRVs squarely in the failure window. The calls we get in Exton follow a pattern: a water heater relief valve that started dripping, a second or third toilet fill valve in as many years, or a new water heater that is already acting up because the expansion tank failed. In nearly every one of those houses, the gauge reads over 80 psi. Our shop is about 10 minutes away on Pottstown Pike, so this is usually a same-day job.
Also serving Exton: Water Heater Repair & Replacement | Drain Cleaning | Sewer & Water Line Repair | Toilet Installation & Repair | Faucets, Sinks & Disposals | Sump Pumps, or see everything we do in Exton.
At Golden Rule Plumbing, our name is our philosophy. We treat every Chester County homeowner the way we’d want to be treated, which means clear pricing, no membership fees, and no salesman pushing services you don’t need.
Ask us about pricing when you call. For most jobs we can give you a realistic range over the phone, and for many, a firm number from a photo or two. That kind of transparency is rare in the trades, and it’s what’s kept Exton homeowners calling us since 2007.
A straightforward PRV swap from Golden Rule runs $475 to $625, and that includes the new Watts valve, labor, tax, and the trip. We confirm your pressure with a gauge before we replace anything, and if the valve is in an unusual spot or the piping around it needs work, we will tell you before we start.
Between 50 and 70 psi is ideal, and Pennsylvania code caps residential pressure at 80 psi. Plenty of Exton homes on public water test well above that when the PRV has worn out, and the symptoms creep up slowly enough that most people don’t notice until something fails.
Usually within a few feet of where the water line enters the house, near the main shutoff or water meter. It’s a bell-shaped brass fitting, often with an adjustment screw on top. Some homes never had one installed, which is its own problem on a high-pressure street.
Ten to fifteen years is typical. They often fail gradually, with pressure creeping up over months, so the symptoms (dripping relief valve, failing fill valves, banging pipes) show up long before anyone thinks about the valve itself.
Yes. A hose-bib pressure gauge costs about $10 to $15 at any hardware store. Thread it onto an outside spigot or the washing machine cold valve, open the valve, and read the number. Anything over 80 psi is worth a call; anything bouncing around is worth a call too.
Often, yes. The expansion tank absorbs the pressure spikes a water heater creates, and years of high pressure wear it out right alongside the PRV. We check it on every PRV job and will tell you if it has failed.
