Tap Squealing or Vibrating
- How urgent
- Low risk
- Who fixes it
- A plumber
What's happening?
When one tap makes a noise and the rest of the house is quiet, the tap is the source. A washer or cartridge that has worn can chatter against its seat as water passes, producing a squeal or a hum. A loose jumper valve inside a bib or pillar tap does the same at part-open. If the sound only happens at a certain handle position, it is the washer; if it happens at any opening, look at pressure or a restriction. Noise that follows every tap in the house, or is felt in the wall pipes, is a supply or pipework fault covered on the pipes humming or vibrating page, not a tap fault.
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What usually causes it?
- A worn or loose tap washer chattering against its seat
- A cartridge with worn ceramic discs or seals
- A jumper valve loose in an older bib or pillar tap
- A partly closed isolating valve under the tap, so water screams through it
- Supply pressure that is high for the type of tap
- A tap whose seat is scored so the washer cannot seal and flow is uneven
- A pipe behind the tap that is unclipped and vibrates when water moves
Is it dangerous?
No. The risk is that a worn washer will eventually drip or fail. A squeal from the tap can feel loud at night but does not mean a leak.
Can I fix it myself?
Find out which tap: hot or cold, kitchen or bathroom. Check that its isolating valve is fully open; if it is half-closed, the noise often stops when you open it. Change the handle position to see where it squeals. Close the isolating valve, strip the tap and replace the washer, or the cartridge in a lever or quarter-turn tap, with a matching part. Dress a scored seat with a seat cutter or fit a washer with a rubber seat. If the sound continues after a new washer, the pressure or a loose pipe may be the cause, so move on to the pipe noise pages.
When should you call a plumber?
Call a plumber when a new washer does not stop it, when the seat is damaged, when the tap is a make you cannot strip, when the sound is in several taps, or when the isolating valve is stuck.
What will the plumber actually do?
- Identify which tap and which handle position makes the noise
- Replace the washer or cartridge, and dress or replace a worn seat
- Check and replace a stiff isolating valve
- Measure the supply pressure and fit a regulating valve if it is high
- Clip loose pipework behind the tap
Who fixes this
Questions people ask
Why does my bath tap squeal when I turn it on?
Why does only the hot tap vibrate?
What if every tap makes the noise?
Can a squealing tap damage the pipes?
Sources & References
Before you book, read what to check before a plumber starts.
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