Drain Unblocking in North & North West London — Blockages, Jetting & CCTV Surveys

What do you need?

Choose the job. Each one says what to send, and whether to call.

• A blocked drain

  Call if sewage is overflowing. Otherwise say which fitting is slow and send a photograph.

  Call 020 7101 3168

• A survey of the run

  Say where the manhole is, and whether the drain serves one home or several.

  Send this in a brief

Locate the blockage from the affected fixtures and chambers

A drain-unblocking brief should list every affected sink, basin, bath, shower, toilet, gully or inspection chamber and state what still drains normally. Record whether water is slow, static, rising elsewhere, backing up with another fixture or overflowing outside. Note when the problem began and any recent works, foreign objects, grease or recurring history. Photographs are useful only where safe and hygienic. The pattern helps distinguish a local appliance trap or branch from a soil stack, private drain, shared run or public-sewer issue; the website cannot diagnose the location from one blocked fixture.

Protect occupants before investigation begins

Sewage overflow, contaminated standing water, an unsafe chamber or water approaching electrical equipment needs immediate risk control. Keep people and pets away, avoid repeated flushing and do not enter a chamber or confined space. Use the telephone route to describe active flooding or sewage risk and confirm an appropriate next step; an online form is better for non-urgent evidence and planned follow-up. A make-safe attendance, if accepted, may control the immediate consequence without completing repair. Hygiene, isolation and safe access requirements should be agreed before tools are introduced into an occupied property.

Confirm private, shared and sewer responsibility first

In England and Wales, a property owner is normally responsible for a drain within the property boundary that serves only that property, while the sewerage undertaker is normally responsible for lateral drains outside the boundary and public sewers, including many shared sections; exceptions and private systems mean the actual status must still be checked. Establish which properties discharge through the affected route, where the boundary lies and whether neighbours report the same symptom. Title plans and chamber positions can assist but do not always prove ownership. Suspected public- or shared-sewer flooding, or uncertainty about ownership, should be reported to the relevant sewerage undertaker before private alteration is attempted. The correct next step may instead be a private drainage visit or freeholder action once responsibility is confirmed.

Use staged investigation before choosing a clearance method

Initial checks can establish accessible traps, fixture branches, chamber levels and whether the obstruction is upstream or downstream. Rodding, mechanical tools, jetting and CCTV have different purposes and access requirements. A powerful method is not automatically the safest or most effective response, particularly where pipe condition, displaced joints, roots or a collapsed section are possible. The visit basis should state whether it covers attempted clearance, investigation, survey recording or a defined combination. If access or condition prevents safe progress, the finding and next diagnostic step should be documented instead of escalating informally.

Keep clearance, condition survey and repair distinct

Restored flow confirms that water passed at the end of the visit; it does not certify the full drain condition or guarantee that a recurring defect has been removed. A CCTV survey can help record visible condition and location when access and cleanliness permit, but the agreed deliverable should state whether video, stills, measurements or a written note are included. Cracks, deformation, root ingress, poor falls or displaced joints can require excavation, lining or another repair scope. Repair selection should follow the observed defect, ownership and access rather than be sold automatically with an unblock.

Coordinate rainwater, internal plumbing and building defects

Foul drainage, surface water, internal waste pipes, gullies and gutters should not be conflated. A symptom during rainfall can involve surface-water capacity or an incorrectly connected or damaged route, while an isolated sink may remain an internal plumbing task. Building movement, tree roots and recent groundworks can also affect drainage. The accepted scope should define the system being investigated and route plumbing, roofing, groundworks or structural concerns separately. Chemicals should not be mixed or used indiscriminately, especially where product interaction, pipe material, later tool use or occupational exposure is uncertain.

Plan access through flats, gardens and shared spaces

Drain routes can cross locked gardens, basements, communal corridors, commercial premises or neighbouring land. Record chamber locations, parking, floor level, keys, working-hour restrictions and any history of hidden or covered access. Leasehold and managed buildings may require the freeholder or managing agent to authorise work and notify other occupants. Heavy or contaminated equipment needs a protected route through the property. An appointment should not assume that every chamber can be opened, that water is available for jetting or that a shared stack can be isolated without the relevant permissions.

Close the drainage visit with a responsibility-led record

A useful outcome note identifies affected fixtures, chambers checked, flow observations, method used, material recovered where relevant, access limitations and whether service was restored. It should distinguish immediate clearance from recommended survey or repair and state any private, shared, freeholder or undertaker follow-up. Quotations for further work should separate excavation, lining, chamber work, making good, waste and exclusions. Photographs or survey media belong to the handover only when included in the agreed deliverable. No visit should promise that an uninspected network cannot block again.

Frequently Asked Questions

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