How to Stop a Leak Under the Sink
A leak under the sink can cause damage quickly. Here’s what to do in the first few minutes – and when to call a leak specialist in Leeds. Practical, calm steps.
Fix & Patch Leeds is roofing-first for leak source control, with secondary internal repairs for water damage to walls, floors and ceilings where needed.
Step-by-step
Turn off the water supply – close the stopcock under the sink or the main stopcock if you can’t find it.
Open the cold tap to release pressure and drain what’s left in the pipe.
Place a bowl or towel under the leak to catch any remaining drips.
Don’t overtighten fittings – you can crack plastic or damage seals.
Call a leak specialist if the leak continues or you’re not sure where it’s coming from.
Common mistakes
- ⚠ Don’t ignore a drip – it can lead to water damage and mould.
- ⚠ Avoid DIY repairs if you’re unsure – wrong parts or overtightening can make things worse.
When to call a pro
- • The leak doesn’t stop after turning off the supply.
- • You see water pooling or dripping from pipes you can’t access.
- • The leak is from the waste pipe or u-bend.
- • You’re not confident doing the repair yourself.
Related services we do
FAQs
- Where is the stopcock under the sink?
- Usually under the sink unit – a small valve on the cold supply pipe. Turn it clockwise to close.
- Can I fix a sink leak myself?
- Simple washer or tap cartridge changes are possible if you’re handy. Pipe or waste leaks usually need a leak specialist.
- How quickly can a leak specialist attend in Leeds?
- We aim for same-day response where possible. Call or WhatsApp for the fastest response.
Leeds + surrounding areas