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Blockages

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More than one property affected, or a chamber overflowing near the boundary? We match you with up to 3 verified local specialists — after checking whether the sewer is actually your water company’s to clear.

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Open sewer inspection chamber in a UK residential road with an engineer working above it
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A sewer blockage behaves differently to a blocked drain. It backs up several fixtures at once, often affects neighbouring properties, and shows itself at the last chamber before the boundary rather than at the gully by the house. That pattern matters, because it usually means the obstruction is in a shared or public sewer — and those stopped being homeowners’ responsibility in October 2011.

It may cost you nothing at all

Since the 2011 private sewer transfer, shared drains serving more than one property and lateral drains beyond your boundary belong to the regional water company. They will attend and clear a blockage in those free of charge. Before paying anyone, it is worth one call — and any specialist we match you with will tell you if that is the right call to make.

Typical cost

£120–£350

Private sewer clearance; if the sewer transferred in 2011 your water company clears it free

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What’s involved

Blocked Sewers

Establish ownership first

An engineer confirms whether the blocked run serves only your property, is shared with neighbours, or lies beyond the boundary. That decides whether you pay or the water company attends.

Jet the sewer run

Shared runs are longer and larger than a house drain, so clearance normally means a high-pressure jetting unit rather than rods, working from the downstream chamber back.

CCTV the cleared run

A sewer that blocks repeatedly is usually damaged. Filming the cleared run gives you evidence for the water company, a shared-cost conversation with neighbours, or an insurance claim.

FAQs

Blocked Sewers questions

Is a blocked sewer my responsibility or the water company’s?

If the pipe serves only your property and sits within your boundary it is yours. Shared drains and lateral drains beyond the boundary transferred to the regional water companies in October 2011, so blockages in those are cleared free of charge by them. If you are unsure, report it to your water company first — they will attend and tell you.

What if the blocked sewer is shared with my neighbours?

Shared sewers are almost always public since the 2011 transfer, so the water company clears them. Where a shared private drain has been retained, costs are normally split between the properties it serves — a CCTV survey establishing where the fault lies is what makes that conversation straightforward.

Not quite what you need?

These are the closest related services.

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