Bath Unblocking

Welcome to Cooper & Sons Drainage, your first-choice solution for a slow-draining or blocked bath. 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 Bath

A bath that drains slowly is often the first sign of a blockage building up, worth calling before it stops draining altogether.

  1. Hair and soap scum: the most common cause by far, hair combines with soap residue to form a dense plug in the trap or waste pipe. This builds up gradually, so the bath usually drains slower and slower over several weeks before it stops completely. We clear this from the trap and waste directly, which resolves the large majority of bath blockages without needing to go further into the pipe run.
  2. Old lead or cast-iron pipework: common in period homes across our coverage area, these narrower, ageing pipes block more easily than modern plastic waste. The internal surface is often rougher too, which gives debris more to catch on as it builds up. We use gentler rodding techniques on older pipework and avoid high jetting pressures unless a survey confirms the pipe can take it.
  3. Slow build-up over time: a bath that’s taken longer to drain for weeks is a warning sign, not something to wait out. Left long enough, a slow drain typically becomes a full blockage, and by that point standing water can start to smell or attract flies. Clearing it early is quicker and less disruptive than waiting for it to stop draining altogether.
  4. Shared waste pipework: in converted period properties, a bath waste can share a run with other fixtures, so the real blockage may be further down the line. This is worth ruling out if the bath keeps blocking again shortly after clearing. We can trace the shared run to confirm where the actual blockage sits.

Fast, Reliable Bath Unblocking

At Cooper & Sons Drainage, we understand a blocked bath is more than an inconvenience, especially in a busy household with one bathroom. 

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 or jetting, whichever suits the cause and the pipework involved.

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.

24/7 Emergency Drain Unblocking
Bath Unblocking
High-Pressure Drain Jetting
Manhole Unblocking
Root Removal
Sewer Cleaning
Shower Unblocking
Sink Unblocking
Toilet Unblocking
Need Help Right Now?
Blocked bath and need help fast? Call 0208 936 7011 any time, day or night, for an emergency response.
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A Drainage Company You Can Rely On

We've spent 22 years clearing drains across London and Surrey. Here's what sets us apart from the rest.
  • 1

    No Subcontractors

    Your job is handled by our own team throughout, never passed to a third party.

  • 2

    1-Year Guarantee

    Every completed job is covered for 12 months.

  • 3

    Free Assessment & Quote

    Every call-out is free, fully itemised, no hidden costs, no pressure.

  • 4

    Family-Run

    Part of the same family behind Cooper & Sons Roofing, a name already trusted across SW London and Surrey.

  • 5

    Local Specialists

    We know the drainage quirks of period housing stock, shared drain runs and clay-ground conditions across our coverage area.

  • 6

    22 Years' Experience

    Clearing drains across London and Surrey.

Areas We Cover for Emergency Drain Unblocking
We carry out emergency drain unblocking across a wide area. Call us to confirm your postcode.
How It Works
Simple from First Call to Final Tile
  • 1

    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.

  • 2

    Clear Written Quote

    Every job priced in full before we begin. No vague estimates, no hidden extras.

  • 3

    Blockage Cleared

    Our own team clears the blockage using the least disruptive method that will do the job properly.

  • 4

    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?

Book your free, no-obligation assessment today. We'll clear the blockage fast, with no pressure and no hidden costs.

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. 

Yes. A slow-draining bath is usually an early-stage blockage, clearing it now is quicker and less disruptive than waiting for it to stop draining altogether.

Rarely. Most bath blockages clear via the overflow or waste outlet without removing panels. We'll only suggest this if the blockage genuinely requires it.

Every completed job is covered by our 1-year guarantee.

Never. Every job is completed entirely by our own team.