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When a faucet slams the pipes with a bang or a shower drops to a trickle the moment someone runs the dishwasher, the problem is usually the PRV valve most homeowners never think about. Since 1995, Herndon McFarland Plumbing has provided pressure regulator repair in the DFW area to protect your plumbing and fix water pressure problems.
Book your diagnostic visit online with Herndon McFarland Plumbing today.
A pressure regulator, also called a PRV, is located where the city main enters your home and holds incoming pressure in a safe range. When it drifts or fails, every fixture downstream pays for it. Here is how we handle water pressure problems across DFW.
We measure static pressure at a hose bib and observe how it behaves under demand. That reading tells us whether your regulator is failing high, failing low, or working fine, while the trouble lies elsewhere.
Many regulators can be restored rather than replaced when only the bonnet, spring, or seat is worn. We carry common rebuild parts and repair the unit on-site if the valve body is still sound.
When the casting is corroded or cracked, or the diaphragm is torn, a rebuild is not worth your money. We install a correctly sized replacement and set it to a pressure your fixtures and appliances are rated for.
That bang when a valve shuts fast is not just noise. We identify whether the cause is excess pressure, a failed regulator, or missing arresters and then fix the source rather than muffle the symptom.
Pressure above roughly 80 psi shortens the life of water heaters, supply lines, and fixture valves. We check what is already at risk so you can act before a fitting fails.
Sustained high pressure stresses joints and accelerates pinhole and slab leaks. When we suspect pressure has caused damage, we bring in our leak detection and repair team to find the source.
Much of the DFW metroplex is on municipal systems engineered to push water uphill and over long distribution runs. The pressure reaching many homes has long been higher than residential plumbing is designed to handle. The U.S. Environmental Protection Agency notes that household pressure above 80 psi can stress fixtures and fittings and recommends installing a pressure-reducing valve to bring it within a safe range.
Water delivered at 90 or 100 psi loads every valve seat, supply hose, and soldered joint with a force they were never sized for. That constant strain causes water hammer, dripping fixtures, and early water heater failures that homeowners call us about. The regulator controls the high incoming pressure to your home. When it fails, the whole system suffers the problem at once.
Fail high, and you see fixtures wearing out fast and hear banging pipes. Fail low, and you get weak flow that drops further whenever a second fixture runs. Either way, the valve no longer does its job, stressing the pipes and joints behind it.
That is why we lead with a gauge rather than a guess. At Herndon McFarland Plumbing, we measure your water pressure under real conditions, confirm whether the regulator is the cause, and provide repair or replacement to keep your fixtures and appliances safe. Catching a drifting regulator early is one of the most cost-effective forms of leak prevention.
Chris Roland called us about complicated plumbing problems caused by high water pressure in his home. Our team conducted a thorough inspection and resolved the pressure issues and fixture failures.
Chris wrote in his review:
“Herndon-McFarland was very thorough and professional when helping me decide what to do with my extremely complicated plumbing situation. Their quotes were quick and thorough, and their crews were on time and professional. I’d recommend them to anyone who asks.”
We bring the same disciplined diagnosis to pressure work because unchecked pressure is often the starting point for plumbing and slab leaks. Read Chris’s full Google review.
Undetected PRV valve faults can lead to hidden foundation leaks. Evelyn Tidwell faced the same situation. When she called us, the leak was obvious beneath her home. Our team efficiently fixed the issues, restored and cleaned the area, and assisted her with inspections.
She noted:
“The staff was courteous, helpful, and took the time not to make a mess of things. The guys hung a plastic tarp over open cabinets to keep dust out. The leak was fixed and inspected the next day.”
Showing up on time, doing the work as discussed, and listening to the homeowner is the same standard we hold for every job in DFW. Read Evelyn’s full Google review.
Our crews bring more than 100 years of combined experience serving Farmers Branch, Addison, and the surrounding DFW metroplex, backed by TSBPE license #RMP35786.
If your pipes bang, your flow fades, or you suspect your pressure is too high, we will measure it and let you know where it stands. We also provide comprehensive plumbing services in the DFW area, including non-invasive leak detection and pipe repair.
Schedule your inspection online today.
The common signs are water hammer or banging pipes, fixtures that wear out or drip far too soon, and flow that swings between strong and weak for no clear reason. A regulator failing low produces weak pressure that drops further when a second fixture runs. If you notice any of these, it is worth having the pressure measured.
We attach a gauge to an outside hose bib, read your static pressure, and then watch how it responds when fixtures run. That shows whether pressure is too high, too low, or fluctuating, and whether the regulator is the cause or the trouble lies elsewhere. It is a quick, non-invasive first step.
It depends on what failed. If the spring, bonnet, or seat is worn but the valve body is sound, we can often rebuild it on site. If the casting is corroded or cracked, or the diaphragm is torn, replacement is the better value. We tell you which applies before any work begins.
Yes. Pressure above roughly 80 psi quietly shortens the life of water heaters, supply lines, and fixture valves, and stresses joints in ways that lead to leaks long before anything visibly breaks. Catching it early matters even when nothing has failed yet.
Many DFW municipal systems move water across long distances and elevation changes, so the pressure reaching homes is often higher than residential plumbing is rated for. A working regulator brings it into a safe range, which is why a drifting or failed one causes such widespread trouble here.
You can book online anytime, and we will set a diagnostic visit. We offer same-day appointments when the problem cannot wait and round-the-clock service for pressure or leak emergencies across DFW.
From slab leaks under the foundation to sewer line repipes, every job is diagnosed, documented, and done right. A look at recent work across North Dallas.
Excellent customer service, very friendly staff from the person taking the call to the staff fixing the repairs. Very trustworthy company. Shaun explained the step-by-step process and provided very fair prices.
Their positive, upbeat, anxious-to-please attitude made the whole process the very best it could be! All of the employees were a pleasure to work with. I highly recommend Herndon McFarland.
Trent and Reggie were the most professional associates entering our home. They treated our home with respect as if it were theirs. We will use this company again because of them and our experience.
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