Under-Sink Leak Repair
Under-Sink Leak Repair
A damp cupboard, a musty smell or a buckled cabinet base almost always means a slow under-sink leak. We find the exact source rather than replacing everything and hoping.
Under-Sink Leak Repair in North London, done properly the first time
Under-sink leaks come from a handful of places: a cracked or loose trap, a perished flexible tap tail, a weeping isolation valve, a failed sink-clip seal or a badly connected appliance spigot. We dry everything down, run each fitting under load and watch where the water reappears.
Once found, the repair is usually a new trap, flexi hose or valve — parts we carry. We also check the cabinet base for rot and tell you honestly if it needs drying out or replacing. We cover Barnet, Finchley, Whetstone, Enfield, Muswell Hill and the surrounding North London postcodes.
Why choose Norvex for under-sink leak repair
Premium workmanship, fixed pricing and a service experience built around you.
Leak traced to the exact fitting, not guessed at
New traps, flexi tails and isolation valves carried on the van
Appliance and dishwasher connections checked at the same time
Cupboard dried and cleaned before we finish
Same-day slots for active leaks
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for under-sink leak repair
Free, no-obligation quotes. Most calls answered within 30 seconds.
Why choose Norvex
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited
Worcester, Vaillant, Ideal & more
Same-week Appointments
Most jobs booked within 48 hours
5★ Reviewed
Hundreds of verified reviews
Your questions, answered
Can you find a leak that only happens sometimes?
Yes. Intermittent under-sink leaks usually appear only when the sink drains or the washing machine discharges. We recreate those conditions on site to pinpoint it.
Is water under the sink always a plumbing leak?
Not always — condensation on a cold pipe or a leaking sink rim seal looks identical. We check both before quoting a pipework repair.
How urgent is a slow under-sink leak?
More urgent than it looks. A slow drip rots the cabinet base and can reach the floor structure. Turn off the isolation valves and call us the same day.
Do you repair leaks in flats where a neighbour is affected?
Yes, and we provide a short written summary of the cause and repair, which managing agents and insurers in Barnet usually ask for.
Which areas of North London do you cover for under-sink leak repair?
We provide under-sink leak repair across the whole of North London, including Barnet, Finchley, Muswell Hill, Hampstead, Highgate, Enfield and the surrounding N, NW and EN postcodes. Local engineers means short call-out times wherever you are.
What our customers say
"Quoted, fitted and gone in a day. New boiler, no fuss, new smart thermostat thrown in. Best tradespeople we've had in years."
Sarah, Barnet
"Emergency call at 9pm — engineer on site by 10:30. Sorted the leak that night. Highly recommend."
Michael, Finchley
"Total bathroom renovation. Beautiful job, on budget, finished early. We'll be using Norvex for the kitchen next."
Priya, Highgate
Ready when you are
Book under-sink leak repair with a Gas Safe engineer — fixed pricing, same-week appointments.
Related repairs
Common kitchen plumbing faults we fix in Barnet and across North London — plus the wider room-by-room services these repairs sit under.
Under-Sink Leak Repair near you
Book under-sink leak repair today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.