Sink Unblocking
Welcome to Cooper & Sons Drainage, your first-choice solution for a blocked kitchen or bathroom sink. Part of the same family behind Cooper & Sons Roofing, we’ve spent 22 years building our reputation on turning up fast and fixing the problem properly the first time.
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Common Causes of a Blocked Sink
Kitchen and bathroom sinks block for different reasons, so we diagnose the actual cause before we start clearing.
- Kitchen sinks, grease and fat: cooking fat and food waste solidify inside the pipe as they cool, gradually narrowing the waste until it blocks completely. This tends to build up gradually over weeks or months, so the sink often drains more slowly for a while before it stops altogether. Jetting is usually the more effective fix here, since it clears fat from the pipe wall rather than just pushing through the middle.
- Kitchen sinks, food waste: rice, pasta and vegetable peelings are common culprits, especially in shared kitchens and rental properties. These swell once wet and can block a waste pipe surprisingly quickly, often without warning. We clear these with rodding in most cases, moving to jetting if the blockage has combined with grease.
- Bathroom sinks, soap and toothpaste build-up: these harden over time and combine with hair to form a stubborn blockage in the trap. It’s a slower process than a kitchen blockage, so a bathroom sink that’s started draining sluggishly is worth dealing with before it stops completely. We clear the trap directly in most cases, which resolves the majority of bathroom sink blockages on the first visit.
- Shared or older waste pipework: period conversions and flats often share a single waste run, so a blockage can originate from a neighbouring property. If your sink keeps blocking despite regular use and no obvious cause, this is worth ruling out first. We can trace the shared run and confirm where the actual blockage sits before agreeing any work.
Fast, Reliable Sink Unblocking
At Cooper & Sons Drainage, we understand a blocked sink brings the kitchen or bathroom to a standstill. Every call-out is free, so you know what you’re paying before any work starts.
Our team will assess the blockage, explain what’s needed, and clear it using rodding, a plumber’s snake or jetting, whichever suits the cause.
Every completed job is covered by our 1-year guarantee, giving you peace of mind that the fix will hold.
We’re also proud of our reviews from satisfied customers, which you’ll find in the footer below.
Call us today, any time, for a fast response.
Our Drainage Services
Customer satisfaction is placed at the forefront of every job. We know that a blocked drain is stressful, so we keep things simple and fast.
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A Drainage Company You Can Rely On
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No Subcontractors
Your job is handled by our own team throughout, never passed to a third party.
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1-Year Guarantee
Every completed job is covered for 12 months.
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Free Assessment & Quote
Every call-out is free, fully itemised, no hidden costs, no pressure.
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Family-Run
Part of the same family behind Cooper & Sons Roofing, a name already trusted across SW London and Surrey.
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Local Specialists
We know the drainage quirks of period housing stock, shared drain runs and clay-ground conditions across our coverage area.
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22 Years' Experience
Clearing drains across London and Surrey.
Areas We Cover for Emergency Drain Unblocking
How It Works
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Free Call-Out / Assessment
Every call-out is free. We assess the problem, on-site or by phone for straightforward jobs, and discuss your options before any work starts.
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Clear Written Quote
Every job priced in full before we begin. No vague estimates, no hidden extras.
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Blockage Cleared
Our own team clears the blockage using the least disruptive method that will do the job properly.
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Inspection & Sign-Off
We check the work's done properly, confirm the fix, and cover it with our 1-year guarantee before we leave.
Ready for a Fast Fix?
Frequently Asked Questions
We always confirm the price before starting work, so there are no surprises on the invoice.
We prioritise genuine emergencies and give you a realistic arrival window when you call.
Yes, an out-of-hours surcharge applies.
Usually repeated build-up of fat, oil and food waste inside the pipe. Avoiding pouring fat down the sink helps, but once a pipe has narrowed significantly, jetting clears it properly rather than a temporary fix.
In most cases, yes. Rodding, a plumber's snake or jetting through the existing waste clears the vast majority of sink blockages without dismantling the pipework.
Every completed job is covered by our 1-year guarantee.
Never. Every job is completed entirely by our own team.