Tap makes a whistling or squealing noise
⚠️ Turn off the water supply before dismantling the tap.
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Most likely cause & what to check
Whistling when the tap is partially open is usually a worn or loose rubber washer vibrating against the seat.
Turn off the water supply, dismantle the tap headgear, and inspect the washer. Replace if it shows any wear, cracking, or distortion.
Apply a thin smear of silicone grease to the new washer before fitting.
If the noise persists after replacing the washer, the seat itself may be damaged — regrind or replace the headgear.
On a ceramic cartridge tap, the cartridge itself may need replacing — they are brand-specific but widely available online.
High pressure can also cause whistling — if the noise is throughout the house, ask your water supplier to check the incoming pressure.
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