Residential Plumbing Service / Water Pressure
What Causes Low Water Pressure in a House and When It’s a Serious Plumbing Problem
Low water pressure is not “just annoying.” It’s a symptom. Sometimes it’s a simple fixture restriction — other times it’s corrosion, a pressure regulator issue, or a leak bleeding off pressure inside your plumbing system.
Top Causes of Low Water Pressure
- Aerator or showerhead blockage from mineral buildup and debris.
- Partially closed shutoff valves under sinks or at the main.
- Corroded supply lines in older homes, restricting flow.
- Pressure regulator failure causing inconsistent or low PSI.
- Hidden leaks bleeding off pressure behind walls or under floors.
Serious Warning Signals
Sudden pressure drop across the whole house, wet spots, musty smells, and rising water bills. If those signals are showing up, move straight to hidden leak detection.
Emergency Control Link
If pressure loss is paired with flooding or an active leak, your first move is shutting off water. Use the emergency shutoff steps and then call for service.
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