Low Water Pressure Repair

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Weak water pressure makes showers frustrating, slows down appliances and can be an early sign of a bigger plumbing problem. Plumber On Demand finds out why your pressure dropped, whether it is one fixture or the whole building, and fixes the cause instead of just the symptom.

Common causes of low water pressure

• Clogged aerators and shower heads from mineral build-up in hard water areas
• Partly closed or failing valves including the main shutoff and fixture shutoffs
• A failing pressure reducing valve that lets pressure drop too low or swing up and down
• Corroded galvanized pipe that narrows on the inside over time
• Hidden leaks that steal flow before it reaches your taps
• Supply issues such as an undersized or damaged water service line

How we diagnose it

We start by measuring the pressure at the main and comparing it with what you get at the fixtures. If the problem is in one tap, it is usually the fixture, aerator or shutoff. If the whole house or building is low, we look at the main valve, the pressure reducing valve, the water service and the piping in between. That tells us exactly where the restriction is before any work is done.

Fixing it at the source

Depending on what we find, the fix might be as simple as cleaning or replacing an aerator or cartridge, or as involved as replacing a pressure reducing valve, repiping a corroded section or repairing a leak. If low pressure is caused by the water service itself, see our water main service page.

When low pressure is urgent

A sudden drop in pressure across the whole property, especially with the sound of running water or new damp spots, can mean a leak. Shut off the main if you suspect one and call us right away.

Low Water Pressure Repair FAQs