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Recurring Blockage Investigation

If clearing the blockage only buys you a few weeks, the real cause is still down there. A camera check can find it, so you can fix it properly.

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What is a recurring blockage investigation?

A recurring blockage investigation uses a CCTV survey to find out why a drain keeps blocking. Rather than clear the same blockage again and again, it looks for the cause: roots, a collapse, scale or a poor fall. You can then fix the problem for good, rather than pay to clear it each time.

A drain that blocks again and again almost always has a cause. It could be roots, a partial collapse, displaced joints, heavy scale, or a length of pipe with the wrong fall. Since clearing it only treats the symptom, the blockage comes back.

The investigation uses a camera survey to find why the blockage keeps returning. You can then pay for a fix that lasts, rather than for the same call-out again.

For more detail, read what it costs to unblock a drain, who is responsible for a blocked drain and what drain jetting costs.

When you need a recurring blockage investigation

  • The same drain blocks again within weeks of being cleared
  • You have paid for repeated call-outs to the same spot
  • Drains are slow or gurgle again soon after clearing
  • Smells or damp return alongside the blockages
  • There are mature trees near the drain run

Why it matters

Stop paying twice

Fix the cause, and the cycle of repeat call-outs can finally end. You can then stop paying to clear the same drain over and over.

Root-cause clarity

You can see on camera what causes the repeat blockages. With the evidence on screen, the fix doesn't have to be guesswork.

A lasting fix

Ask for the right repair: relining, a patch, root cutting or digging. The drain can then get one proper fix, not a string of short-term ones.

What it usually includes

Ask the engineer to confirm what their quote covers, since this varies.

  • Clearance of enough of the blockage to pass the camera
  • A full CCTV survey of the affected run
  • Identification of the root cause — roots, collapse, scale or falls
  • A clear, costed recommendation for a permanent fix

How it works

  1. 01

    Clear & inspect

    First, the engineer clears enough of the blockage to get the camera through, then films the run. Looking before fixing means you can treat the cause, not just the symptom.

  2. 02

    Identify the cause

    Next, the engineer finds and rates any roots, collapse, scale or poor fall. They also note how far along the pipe each one sits.

  3. 03

    Recommend the fix

    Finally, ask for a clear recommendation for a lasting fix, with a price. You then know what the fix involves.

How much does a recurring blockage investigation cost?

The cost of a camera investigation depends on access, and on whether the run needs clearing first so the camera can pass. It can pay for itself if it ends repeat call-out fees. Send us the details, and ask for a written quote before any work starts.

What affects the price

  • Whether the run needs clearing before the camera can pass
  • How accessible the drains are
  • The length of pipe that needs investigating
  • Whether a full coded report is required

Each job gets its own price. Send us the details, with no obligation. Ask for a written quote before any work starts.

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Recurring Blockage Investigation — your questions answered

How much does it cost to find out why my drain keeps blocking?

It depends on access, and on whether the run needs clearing first so the camera can pass. Still, it can save money overall, since it can end the cycle of repeat call-outs. Send us the details. Ask for a written quote before any work starts.

Why does my drain keep blocking even after it is cleared?

Clearing removes the blockage, but not its cause. Tree roots, a collapse, scale or a badly laid section will keep catching debris until someone repairs the pipe itself.

Won't clearing it again just fix it?

Only for a while. The defect stays put, so the blockage returns, often within weeks. A camera check looks for the cause, so the repair can target it.

What is the permanent fix?

It depends on the cause. Options include root cutting, drain relining, a patch repair, or digging out a collapse. Ask for a written quote for the right one.

Related services

Drain Inspection Drain Unblocking Drain Relining Collapsed Drain Repair

Further reading

Costs & Guides How Much Does It Cost to Unblock a Drain? (2026 UK Guide) Published 2026 UK figures for unblocking a drain, rodding and jetting, what changes the price, who pays, and what to do when a blockage keeps coming back. Drainage Responsibility Who Is Responsible for Blocked Drains in the UK? (2026 Guide) Who pays to fix a blocked drain in the UK — you, your neighbour, the landlord, the council or the water company? A clear, boundary-by-boundary guide for 2026. Costs & Guides How Much Does Drain Jetting Cost? (2026 UK Guide) What high-pressure drain jetting costs in the UK in 2026, how it compares to rodding, and when jetting is the right way to clear a blocked drain.

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