24/7 Emergency ResponseFully Insured & DBS-checkedPre-agreed Prices
★★★★★ 4.9/5 from 500+ reviews
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24/7 · NATIONWIDE · PRE-AGREED PRICES

Drain Unblocking Across the UK

We clear blocked drains, gullies and underground pipes so water flows freely again — using high-pressure jetting and rodding, at a pre-agreed price before we start.

  • Reach most jobs within the hour
  • Pre-agreed price
  • Jetting & CCTV on every van
  • Fully insured, DBS-checked

Get a callback in minutes

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🔒 Pre-agreed price before any work

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For an emergency, call 0800 246 5157 now.

★★★★★ 4.9/5 · 500+ reviewsMember of the Water Jetting AssociationProud members of Checkatrade

Drain unblocking is the clearing of an obstructed drain so waste water can flow freely again. If more than one fitting is affected at once, the blockage is usually in the shared underground drain — exactly the kind of job we clear every day.

The signs

Signs you have a blocked drain

A blocked drain rarely appears without warning. Watch for these.

Slow drainage

Sinks, baths, showers or toilets draining slowly across the property.

Gurgling sounds

Gurgling from plugholes or the toilet when water drains away.

Bad smells

Unpleasant, drain-like smells inside or outside the house.

Pooling water

Water pooling around an outside drain, gully or manhole cover.

Waste backing up

Waste backing up when you run a washing machine, sink or bath.

The causes

Common causes of a blocked drain

A one-off blockage just needs clearing; a recurring one usually points to roots or a structural fault.

Fat, oil & grease

Poured down kitchen sinks, hardening on the pipe walls.

Wet wipes & wipes

Sanitary items and wipes that don't break down.

Tree roots

Growing into small cracks and pipe joints in search of water.

Silt & scale

Building up gradually over many years.

Collapsed pipes

Cracked or displaced sections trapping everything that passes.

Our process

How we unblock your drain

1

Diagnose

We locate the blockage, often with a quick CCTV check, so we clear the right spot first time.

2

Clear it

High-pressure jetting for grease, silt and roots, or mechanical rods for solid obstructions.

3

Confirm the fix

We make sure the drain runs freely before we leave, and show you on camera where useful.

4

Advise

If we spot a deeper problem we explain it and quote separately, with no pressure.

Our promise

A pre-agreed price, and a guarantee

Pre-agreed price

We agree a clear, pre-agreed price with you before any work begins — so you know exactly what you'll pay before we start.

Workmanship guarantee

If a blockage we cleared returns within the guarantee period, we'll put it right.

If it can't wait

What to do while you wait for us

  1. Stop using water — don't run taps, flush toilets or use appliances that drain into the blocked pipe.
  2. Lift the nearest drain cover if you can safely, to see where the blockage is.
  3. Move anything valuable away from the affected area in case of overflow.
  4. Don't pour caustic drain chemicals down a fully blocked drain — they sit on top and are dangerous when we open it up.
  5. Call us and describe what you're seeing so we arrive with the right equipment.
National Drainage Company engineer and van on a job
Why us

Why choose The National Drainage Company

  • ✓ 24/7 response across the UK, reaching most jobs within the hour
  • ✓ Fixed, upfront pricing with no hidden charges
  • ✓ Jetting and camera kit on every van — the job done in one visit
  • ✓ Fully insured, DBS-checked engineers
Reviews

What our customers say

★★★★★

"Fast, tidy and exactly the price quoted. Couldn't fault them."

Sarah, London SW18
★★★★★

"Showed me the problem on camera and sorted it properly. No hard sell."

Mark, Manchester M20
★★★★★

"Out to us fast when the kitchen drain backed up. Pre-agreed price, sorted in under an hour."

Priya, Birmingham B29
Recent jobs

Drain unblocking jobs we've done

Wandsworth · SW18

Blocked kitchen drain, fat build-up

Jetted a grease-blocked drain serving a converted flat, cleared in 40 minutes and CCTV-checked clear.

Didsbury · M20

Recurring blockage, root ingress

A camera survey found roots in a Victorian clay drain; we cut them out, jetted the line and quoted a patch repair.

Croydon · CR0

Outside drain overflowing

Cleared a blocked external gully and manhole after heavy rain, then advised on preventing silt build-up.

Related

Related services

FAQs

Drain unblocking FAQs

We agree a clear, pre-agreed price with you before any work begins, so you know the cost upfront.

Most straightforward blockages are cleared within the hour. Heavier grease, roots or a long pipe run can take longer, but we'll tell you upfront.

We confirm the drain is flowing freely before we leave, and if a blockage returns because we didn't clear it properly, we come back to sort it.

You're normally responsible for the pipes within your property boundary; the shared or public sewer beyond it is usually the water company's.

Rarely — it seldom clears a full blockage and can damage older pipes. Professional jetting is safer and far more effective.

Yes — we're fully insured, our engineers are DBS-checked, and we hold recognised industry accreditations including Water Jetting Association membership.

We confirm the drain is flowing freely before we leave, and if a blockage returns because we didn't clear it properly, we'll come back and put it right.

Wherever possible we use no-dig methods such as relining and localised patch repairs, so there's little or no excavation.

Recent work

See the work up close

Engineer clearing a blocked drainBlocked drain chamber before clearingThe same drain chamber cleared and flowing

Blocked drain? Call 0800 246 5157

Fast, pre-agreed price drain unblocking across the UK, 24/7.

📞 Call now: 0800 246 5157
📞 Tap to call 24/7: 0800 246 5157