Why does my kitchen faucet squeal when I turn it?

A squealing kitchen faucet is typically caused by worn washers, O-rings, or valve seats inside the faucet mechanism. When these rubber components deteriorate, water is forced through tight spaces or around damaged seals, creating that high-pitched squealing sound.

The most common culprit is a worn washer at the end of the faucet stem. Over time, these rubber washers harden, crack, or wear down, causing them to vibrate against the valve seat when water flows past. Similarly, deteriorated O-rings around the stem can create squealing as they no longer provide a smooth seal. In some cases, mineral buildup on the valve seat itself can create an uneven surface that causes the washer to vibrate and squeal.

Water pressure can also contribute to the problem. If your home has high water pressure (above 80 PSI), it can exacerbate squealing from worn components. Ottawa's municipal water pressure typically ranges from 40-80 PSI, but some areas experience higher pressure that can accelerate faucet wear.

For a quick temporary fix, try turning the water supply valves under the sink slightly to reduce flow, which may quiet the squeal. However, this is addressing the symptom, not the cause. The proper solution involves disassembling the faucet to replace the worn washers and O-rings - a job that requires shutting off water supply and having the right replacement parts.

When to call a professional: If you're not comfortable working with plumbing connections or if the faucet continues squealing after replacing basic components, it's time for professional help. Sometimes the issue requires replacing internal cartridges or the entire faucet assembly. A licensed plumber can quickly diagnose whether it's a simple washer replacement or if your faucet has reached the end of its lifespan.

For a free assessment of your kitchen faucet issues, Ottawa Pro Plumbing can provide expert diagnosis and repair options.