Blocked Drains London — Clearance, Jetting & CCTV Surveys

Wipes and sanitary products

Wipes, sanitary products and other unsuitable items can obstruct waste pipes. Thames Water advises putting wipes in the bin, including products labelled flushable. A blocked shared run can affect more than one household.

Tell the engineer which fixtures are affected and whether neighbours have the same problem. Material found in a shared drain does not by itself identify which household put it there.

Kitchen fats, oils and food waste

Fat, oil and food scraps can accumulate in drainage. Avoid pouring cooking waste into the sink. A slow kitchen waste and a downstream sewer blockage need different access and investigation.

The appropriate clearance method depends on the location, condition and obstruction. Ask what the proposed work will remove and whether further inspection is needed if the problem returns.

Suspected root ingress

Roots may enter damaged drainage, but a nearby tree or an old house is not a diagnosis. A recurring blockage warrants a clear record of what has been cleared and which pipe sections were inspected.

If a survey identifies roots, ask for the location, accessible footage and repair options. Cutting roots and repairing the route through which they entered are separate tasks.

Damaged or displaced pipework

A fractured, displaced or collapsed section can prevent reliable drainage. Clearing an obstruction may restore flow temporarily without correcting a defect in the pipe.

A repair proposal should identify the affected section and explain access, suitability of repair methods and making good. Confirm ownership before commissioning work on shared or public drainage.

Hair and deposits in bathroom wastes

Hair and other debris can collect around shower and bath wastes. A removable user-cleaning part can be checked according to its manufacturer instructions; concealed pipework is a different investigation.

Stop using a fixture that backs up or leaks. Tell the engineer whether the problem affects one outlet or several, and disclose any drain chemicals already used.

An object lost down a waste

If jewellery or another object has fallen into a waste, stop using that fixture and mention the item before clearance. Further flushing can move it beyond accessible pipework.

Recovery cannot be guaranteed. Agree whether the aim is retrieval, restoring drainage or both, and whether any removal and refitting of the fixture is included.

Drain rodding

Mechanical clearance may be appropriate where the obstruction and access allow it. Confirm the accessible run and what happens if the first method does not restore flow.

Powered mechanical clearance

A suitable cable or cutting tool may be used for particular obstructions. Pipe condition and diameter matter. Confirm that the required equipment and access are available for the appointment.

Water jetting

Jetting may be proposed for suitable drainage deposits and obstructions. It is specialist work whose scope, access requirements and price should be confirmed separately.

CCTV inspection

A camera inspection records the sections it can reach. Ask which run will be surveyed, what deliverable is included and whether clearance is needed first. A survey cannot promise access to every branch.

Structural repair or relining

Where a defect is established, a specialist can assess excavation, local repair or lining suitability. These are separate repair proposals, not work automatically included with clearance.

Confirm responsibility for the affected section

The property boundary alone does not settle drain ownership. Shared drainage may be the sewerage company’s responsibility even inside a boundary. Thames Water considers the location and whether more than one property is affected.

Report a suspected public-sewer problem to the sewerage company and ask it to confirm responsibility. For private work, agree the actual section and authorised scope before booking.

Shared drainage and managing agents

In flats, access, ownership and authority to pay may sit with different people. Tell the managing agent which fixtures or homes are affected and identify who can authorise work on shared infrastructure.

Request factual findings rather than assigning blame from an assumed occupancy pattern. A contractor’s report does not decide lease obligations or liability between residents.

Rented homes and HMOs

Report drainage problems promptly to the landlord or managing agent, particularly when essential facilities are unusable or wastewater is backing up. Keep the report and appointment history.

Ask the property manager which records are required for the property and its licence conditions. Do not assume that one clearance report certifies every aspect of an HMO’s compliance.

A kitchen drain that repeatedly slows

Illustrative situation: a kitchen waste improves after clearance, then slows again. Bring the previous findings and ask what the next stage will establish before buying another identical visit. A blockage and its underlying cause may require different work.

Several flats with affected toilets

Illustrative situation: more than one home reports backing-up fixtures. Notify management and the sewerage company as appropriate. Agree access to shared sections and responsibility before commissioning private work.

A bathroom waste blocked after an object was lost

Illustrative situation: a known object entered the waste immediately before the problem. Stop using the fixture and describe the item. Confirm whether safe retrieval is feasible and whether removal or refitting is included.