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London Drain Clear North London · 24/7

Blocked Sinks

Blocked Sinks London

Kitchen sinks · Bathroom basins · Utility sinks

A blocked sink is usually the easiest drainage problem to fix — provided you don't reach for chemical cleaners that corrode the pipes. We clear blocked kitchen and bathroom sinks across North London on the same day.

Key points

Same-day clear

Most sink blockages take 30 minutes or less to clear properly.

Pipe-friendly methods

We use mechanical and hydro methods. No corrosive chemicals.

Prevention advice

We'll tell you why it blocked, so you can stop it happening again.

Why sinks block

Kitchen sinks block because of fats, oils and grease (FOG) — they pour down warm as liquid, cool inside the pipe, and stick to the walls. Over months, the layer thickens until water can't get past. Food scraps, coffee grounds and starchy waste accelerate the build-up.

Bathroom basins block because of hair and soap scum. Hair tangles into mats; soap fats bind it together. The blockage usually forms at the trap (the U-bend) just below the basin.

Utility and laundry sinks get lint, detergent residue and the occasional sock.

Things you shouldn't put down the sink

Cooking fat, oil and grease — pour cooled into a tin and bin it instead. Coffee grounds — surprisingly cumulative; they scour pipes initially then clog at low points. Food scraps — even with a waste disposal unit, fibrous items like celery and onion skins wrap around the blade. Egg shells — calcium carbonate combines with grease into rock-hard deposits. Rice, pasta and bread — swell with water and form a paste. Paint — never down any drain.

How we clear blocked sinks

For a typical bathroom basin blockage at the trap, we'll disconnect the U-bend, clear the gunk, refit and test. Ten minutes.

For deeper blockages further down the waste pipe, we use a motorised drain auger that follows the pipe and cuts through the blockage. For commercial kitchens with heavy grease build-up, a high-pressure jetter clears the pipe walls completely and stops the problem recurring for months.

What you can try first

Boiling water down the drain (don't pour boiling water into porcelain basins — the temperature shock can crack them). Bicarbonate of soda followed by white vinegar, left for 15 minutes, then flushed with hot water — works well on early grease build-up. A plunger over the drain, with the overflow blocked with a wet cloth.

If none of that shifts it, stop there and request a quote online — using a wire hanger or rough tools can damage older pipework and turn a straightforward clearance into a repair job.

Frequently Asked Questions

What's the most common cause of a blocked kitchen sink?

Fats, oils and grease (FOG) that are poured down warm as a liquid, then cool and stick to the inside of the pipe. Food scraps, coffee grounds and starchy waste speed up the build-up until the pipe eventually narrows to the point where water can't get past.

Why does my bathroom sink keep blocking?

Hair and soap scum are the usual culprits. Hair tangles at the trap just below the basin, and soap fats bind it into a solid mass over time. Fitting a simple drain guard over the plug hole is the easiest way to reduce how often it happens.

Is it safe to use chemical drain cleaner on a blocked sink?

We'd avoid it, particularly on older pipework — corrosive cleaners can damage pipes over repeated use. Boiling water, or bicarbonate of soda followed by white vinegar, is gentler and works well on early-stage grease build-up. If that doesn't shift it, request a quote online rather than reaching for stronger chemicals.

What customers say

Recommended across North London.

"I would recommend this service for drain clearance. They were quick and efficient. Exceptional service all round."

Sarah, Hampstead

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