Is your shower delivering a sad trickle when it used to be a strong, satisfying flow? Low water pressure is one of the most frustrating plumbing issues homeowners face — and it can have many different causes. Davis Plumbing and Heating Inc. diagnoses and fixes low water pressure throughout Riverside County, including Murrieta, Temecula, Menifee, Sun City, and surrounding communities.

Normal Water Pressure vs. Low Pressure

Standard residential water pressure in Riverside County is typically 45–80 PSI (pounds per square inch). Below 40 PSI, you’ll notice weak flow from faucets and showers. Above 80 PSI, you have HIGH pressure, which damages appliances and can cause pipe failures.

The Most Common Causes of Low Water Pressure

  • Partially closed shutoff valves — Check the main shutoff valve at the water meter and the secondary shutoff inside your home. Either one partially closed will restrict your whole-house pressure.
  • Clogged aerators and showerheads — Mineral deposits (calcium and magnesium from hard water) clog the tiny holes in faucet aerators and showerhead nozzles. Unscrew the aerator and soak it in white vinegar overnight — this often fixes the problem for free.
  • Pressure regulator failure — Most homes have a pressure-reducing valve (PRV) where the main line enters the house. When this valve fails, pressure can drop house-wide. PRV replacement is a common service Davis Plumbing performs throughout Riverside County.
  • Corroded or scaled pipes — Galvanized steel pipes corrode from the inside. Over time, mineral buildup can reduce a 3/4-inch pipe’s effective diameter to a fraction of its original size. This is especially common in Sun City and Lake Elsinore where many older homes still have galvanized plumbing.
  • Slab leak — A significant water leak under your slab can reduce pressure throughout the home. Look for other signs: warm spots on the floor, wet baseboards, or a high water bill.
  • Water main break or municipal supply issue — If multiple neighbors also have low pressure, call your water utility to report the issue.

How Davis Plumbing Diagnoses Low Water Pressure

We start with a whole-home pressure test using a gauge at the main supply. Then we systematically check PRV function, individual fixture flow, and inspect for visible signs of corrosion or leaks. If needed, we can perform a slab leak detection scan and a pipe inspection camera run to assess interior pipe condition.

Fix Your Low Water Pressure Today

Don’t live with frustrating low water pressure. Davis Plumbing and Heating will find the root cause and fix it right. Call (951) 657-0393 or schedule service online. We serve all of Riverside County with fast, professional plumbing service.