Blocked drains in Southwark

Map the symptoms before choosing the equipment

A single slow sink, several backing-up fittings and wastewater rising outside are different patterns. Explain whether the problem changes when a toilet is flushed, when an appliance empties or during heavy rain. These observations help identify the section that needs investigating without asking you to open inspection covers or enter a contaminated area.

Our Southwark drainage enquiries include houses, flats, managed blocks and commercial premises. For a business in an occupied building, identify whether neighbouring units use the same drainage route. A private clearance instruction needs a defined section and access arrangement, especially when the suspected obstruction may sit beyond the individual unit.

Establish private and shared drainage responsibility

Thames Water distinguishes private drains from public sewers and transferred lateral drains. A pipe passing through a garden is not automatically the homeowner’s responsibility, and a blockage visible at one property may affect a shared run. Its responsibility guidance explains how to report a suspected public sewer problem.

Before paying for private work on a disputed section, use the water company or property manager to clarify the relevant boundary. Keep any existing report reference. We can discuss an investigation of the privately instructed system, while work on another owner’s infrastructure needs the appropriate authority. Do not assume that every pipe within a block belongs to the individual flat.

Agree clearance and its immediate checks

The engineer assesses accessible drainage and selects an appropriate clearance method for the condition and arrangement. The objective is to restore flow through the affected section and establish whether further investigation is needed. Any limitations caused by poor access, unknown connections or the drain’s condition should be explained before the scope changes.

After clearing an obstruction, the relevant flow checks help show whether the immediate symptom has improved. If water still backs up or the accessible section cannot be inspected properly, that finding matters. A short period of clear flow does not prove that a recurring structural defect or an obstruction farther along the run has been resolved.

Investigate a blockage that keeps returning

Provide dates, previous clearance methods and any camera footage or reports. A recurring problem may need a survey to distinguish retained material, intrusive roots, a damaged connection or another restriction. The proposed inspection should identify which run can be viewed, what preparation is needed and how inaccessible sections will be recorded.

Where defects are found, repair choices follow the evidence. A local repair, relining or excavation may be considered according to condition and access; none is a default consequence of ordering a camera inspection. We explain the proposed repair area, the service interruption and any permissions or reinstatement that need agreeing.

Arrange access around your Southwark property

Tell us about gated courtyards, basement areas, loading entrances and rooms that require an escort. For council housing, Southwark publishes its repair reporting and responsibility information; use that route where the repair falls within the council’s scope. A private appointment with Loyal Plumbers is a separate instruction.

If wastewater is escaping, keep people away from the affected area and stop using the fittings that worsen the overflow. Mention any chemicals already used so the engineer can plan safely. Clearing the pipe and cleaning a contaminated area are different tasks, so state whether cleaning or reinstatement needs to be included in the discussion.

Questions about arranging the work