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"markdown": "[Mountain Man Plumbing / Water pressure](<https://mtnmanplumbing.com/services/pressure-prv/?agentnet=md>) Sandy · Salt Lake Valley\n\nPRV repair & replacement\n\n# FIND THE FAULT. RESTORE THE BALANCE.\n\nThe repair starts with inlet and outlet readings. A serviceable screen or seal may solve the problem; a damaged body, worn assembly or unsuitable valve can make replacement the better choice.\n\n[Call (385) 766-8935](<tel:13857668935>)\n\nOur installed pressure regulator with shutoff and pressure gauge in a West Jordan home\n\nOur work / West Jordan [A regulator. A gauge. Pressure you can check. ↗](<https://mtnmanplumbing.com/past-work-west-jordan-prv-replacement-2/?agentnet=md>)\n\n- [← Water pressure hub](<https://mtnmanplumbing.com/services/pressure-prv/?agentnet=md>)\n\n- [Pressure testing guide](<https://mtnmanplumbing.com/services/pressure-prv/water-pressure-testing/?agentnet=md>)\n\n- [PRV repair & replacement](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/?agentnet=md>)\n\n- [Where regulators fail](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#pv-failure>)\n\n- [A repair kit or a complete valve](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#pv-rebuild>)\n\n- [Choose for the house's demand](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#pv-sizing>)\n\n- [What happens during the visit](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#pv-visit>)\n\n- [What adjustment can fix](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#pv-adjust>)\n\n01 / PRV repair & replacement\n\n## Where regulators fail\n\nWater passes a small opening inside the regulator. Debris at that opening can prevent a tight shutoff. A blocked inlet screen can restrict flow. The diaphragm, spring and stem must move freely together for pressure to stay steady as taps open and close.\n\nOutside leakage deserves its own inspection. A union gasket, threaded connection, body or spring cover can be the source. Water escaping from the cover can indicate a diaphragm problem. Trace the first wet point before deciding what needs replacement.\n\nRead more: [Watts: LF25AUB installation, adjustment & troubleshooting ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/11894-source/639119464660000000/1910200-pdf.pdf>)\n\n02 / PRV repair & replacement\n\n## A repair kit or a complete valve\n\nAn accessible, sound valve with available parts can sometimes be rebuilt. The service kit may include a diaphragm, disc, seat, seals and screen. The brand, model, size and series identify the correct parts.\n\nReplacement makes sense when the casting is damaged, corrosion has compromised the assembly, parts are unavailable or previous repairs have not restored stable operation. It also gives us a chance to improve an awkward connection and make future service easier.\n\nRead more: [Watts: LF25AUB pressure range & flow data ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/20383-source/es-lf25aub-pdf.pdf>)\n\n03 / PRV repair & replacement\n\n## Choose for the house's demand\n\nPipe size is one part of choosing a regulator. The valve also needs the right inlet-pressure rating, outlet adjustment range and capacity for the water the home uses at once. An undersized regulator can look fine at rest and lose too much pressure during use.\n\nWe check the manufacturer's flow information against the house and supply conditions. A large pressure reduction may need a different valve or staged reduction to manage noise and wear. Potable-water suitability and compatible connections belong in that selection.\n\nRead more: [Watts: LF25AUB pressure range & flow data ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/20383-source/es-lf25aub-pdf.pdf>) · [Cla-Val: 90-01 pilot-operated valve & circuit ↗](<https://www.cla-val.com/wp-content/uploads/2021/03/E-90-01.pdf>)\n\n04 / PRV repair & replacement\n\n## What happens during the visit\n\nWe locate a working upstream shutoff, measure the pressure and identify the fault. If the house valve will not isolate the work, the water provider may need to shut off the service outside. The quote should account for that access and for any damaged adjoining pipe.\n\nAfter isolating and draining the section, we service or replace the regulator, clean and reconnect the assembly, then restore water gradually. We check every disturbed joint for leaks, set the outlet using a gauge and run fixtures to verify delivery.\n\nThe final check includes pressure stability after taps close and the condition of the thermal-expansion arrangement. You should know the final setting and where the main shutoff is.\n\nRead more: [Watts: LF25AUB installation, adjustment & troubleshooting ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/11894-source/639119464660000000/1910200-pdf.pdf>) · [Watts: thermal expansion in a closed system ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/18042-source/pg-thermexpansion>)\n\n05 / PRV repair & replacement\n\n## What adjustment can fix\n\nAn adjustment changes the spring setting on a working regulator. On common screw-adjusted models, turning clockwise raises the setting and counterclockwise lowers it. The exact procedure comes from the valve's instructions and requires a gauge.\n\nA higher setting cannot restore a clogged pipe or repair a leaking seat. Before changing it, establish the incoming pressure and test the valve under flow. Avoid turning an unidentified or corroded adjustment screw by guesswork.\n\nRead more: [Watts: LF25AUB installation, adjustment & troubleshooting ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/11894-source/639119464660000000/1910200-pdf.pdf>)\n\n## See the parts at work.\n\n[Explore both regulators in 3D →](<https://mtnmanplumbing.com/services/pressure-prv/#pv-lab>)\n\nQuestions from the house\n\n## Water pressure, explained.\n\n### Is a pressure regulator the same as my main shutoff?\n\nThey work together near the water entry. The shutoff lets you stop water for service or an emergency. The regulator automatically controls pressure while the supply is on.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#answer-is-a-pressure-regulator-the-same-as-my-main-shutoff>)\n\n### Does a PRV replace the water heater expansion tank?\n\nThe regulator controls incoming supply pressure. An expansion tank accepts the extra volume created when stored water heats up. A home can need both.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#answer-does-a-prv-replace-the-water-heater-expansion-tank>)\n\n### Can the water stay on during replacement?\n\nThe section containing the regulator must be isolated and depressurized. Most homes lose water during that part of the visit; we restore it and test the system before finishing.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/#answer-can-the-water-stay-on-during-replacement>)\n\nMountain Man Plumbing / Salt Lake Valley\n\n## Get your water under control.\n\n[Call (385) 766-8935](<tel:13857668935>)\n\n- [Main water shutoffs →](<https://mtnmanplumbing.com/services/shutoff-valves/?agentnet=md>)\n\n- [Water heaters & expansion →](<https://mtnmanplumbing.com/water-heater-repair/?agentnet=md>)\n\n- [Restricted old piping →](<https://mtnmanplumbing.com/services/whole-home-repipe/?agentnet=md>)\n\n- [The line from the meter →](<https://mtnmanplumbing.com/services/water-service-line/?agentnet=md>)\n\n### Sources & public guide record\n\n[Guide data (JSON)](<https://mtnmanplumbing.com/pb/facts/pressure-guide/guide.json>) · [Read as plain text](<https://mtnmanplumbing.com/services/pressure-prv/prv-repair-replacement/?agentnet=md&agentnet_display=html>)\n\n- [Watts: LF25AUB installation, adjustment & troubleshooting ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/11894-source/639119464660000000/1910200-pdf.pdf>)\n- [Watts: LF25AUB pressure range & flow data ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/20383-source/es-lf25aub-pdf.pdf>)\n- [Cla-Val: 90-01 pilot-operated valve & circuit ↗](<https://www.cla-val.com/wp-content/uploads/2021/03/E-90-01.pdf>)\n- [Caleffi: plumbing pressure & elevation ↗](<https://www.caleffi.com/en-us/blog/2-plumbing-system-pressure-concepts>)\n- [Watts: thermal expansion in a closed system ↗](<https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/18042-source/pg-thermexpansion>)\n- [ICC: residential water-pressure requirements, P2903.3.1 ↗](<https://codes.iccsafe.org/content/IRC2021P3/chapter-29-water-supply-and-distribution>)\n- [Utah: adopted construction codes ↗](<https://le.utah.gov/xcode/Title15A/Chapter2/C15A-2-P1_1800010118000101.pdf>)\n- [Sandy City: water system & pressure zones ↗](<https://www.utah.gov/pmn/files/898561.pdf>)\n- [Denver Water: finding restricted flow in a home ↗](<https://www.denverwater.org/residential/services-and-information/troubleshooting-and-repairs/low-water-pressure>)\n- [Oklahoma State University: residential pressure range ↗](<https://extension.okstate.edu/fact-sheets/managing-pressure-in-the-home-irrigation-system>)\n\nConnected in your home\n\n## Keep following the plumbing.\n\n- [01 **Water pressure & PRVs →** See how the regulator controls the house supply.](<https://mtnmanplumbing.com/services/pressure-prv/?agentnet=md>)\n- [02 **Main & outside water shutoffs →** A dependable upstream shutoff makes regulator service possible.](<https://mtnmanplumbing.com/services/shutoff-valves/main-water-shutoff/?agentnet=md>)\n- [03 **Water heater leaks →** A relief-valve discharge can lead back to pressure and thermal expansion.](<https://mtnmanplumbing.com/water-heater-leak-repair/?agentnet=md>)",
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