Why does my faucet have low water pressure?

Low water pressure in a faucet is usually caused by mineral buildup in the aerator, clogged supply lines, or issues with your home's water pressure system.

The most common culprit is a clogged aerator - that small screen at the tip of your faucet. Over time, mineral deposits from Ottawa's moderately hard water build up in this screen, restricting water flow. You can unscrew the aerator (turn counterclockwise) and soak it in white vinegar overnight to dissolve the buildup. If it's severely clogged, replace it entirely - aerators cost just a few dollars at any hardware store.

If cleaning the aerator doesn't help, the problem might be debris in the faucet cartridge or valve. This is especially common in older homes where sediment has accumulated in the supply lines. The cartridge may need cleaning or replacement, which requires shutting off water valves under the sink and disassembling the faucet handle.

Whole-house pressure issues are another possibility. If multiple fixtures have low pressure, check if your main water valve is fully open, or if you have a pressure regulator that needs adjustment. In Ottawa, municipal water pressure typically runs 40-80 PSI, but older homes may have undersized supply lines that restrict flow.

When to call a professional: If the problem affects multiple fixtures, involves the main water line, or if you're uncomfortable working with plumbing connections. A licensed plumber can diagnose whether you need new supply lines, pressure regulator adjustment, or if there's a larger issue with your home's plumbing system.

For persistent low pressure issues affecting your whole home, Ottawa Pro Plumbing offers free consultations to assess your water pressure system and recommend solutions.

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