Common Causes of Low Water Pressure at Home

Low water pressure is one of the more common plumbing complaints, and while it can feel like a mystery, the cause is usually one of a few well-known issues.

Mineral buildup in fixtures

Showerheads and tap aerators can accumulate mineral deposits over time, gradually restricting flow — often the simplest cause to check and fix.

A hidden leak

A leak elsewhere in the system reduces the pressure available at the fixture — this is one of the reasons a sudden, unexplained pressure drop is worth investigating rather than ignoring.

A partially closed valve or supply issue

If pressure is low throughout the home, the main shutoff valve or the building's supply line is worth checking before assuming a fixture-level problem.

• Check if the issue affects one fixture or the whole home — this narrows the likely cause.
• Clean or replace showerhead and tap aerators as a first, simple step.
• Watch for other signs of a leak, such as unexplained water bill increases.
• Have a plumber trace the source if the cause isn't obvious from the above.