Drain Odour Investigation

What a drain odour investigation covers

This service is designed to locate and fix the most common causes of unpleasant drainage smells, with minimal disruption.

• Identify where the odour is strongest and trace it back to the likely source
• Check sink, bath, shower and floor drain traps for lost water seals or poor connections
• Assess waste runs for slow flow, partial blockages and build-up
• Clear blockages using the most suitable method for the pipework and severity
• Confirm improved drainage and reduce odour at the affected outlet(s)
• Explain what caused the issue and what to do next if further work is needed

When this service is the right fit

Book a drain odour investigation if:

• You can smell sewage or stagnant water near a sink, bath, shower, toilet or utility area
• The smell is worse after using water, after rain, or when the room has been unused
• Water drains slowly, gurgles, or backs up intermittently
• You have recurring odours despite cleaning the plughole and surfaces
• You manage a rental or commercial unit and need a clear, practical diagnosis

What happens during the visit

The investigation starts with targeted questions about when the smell occurs and which fixtures are affected. Pipework and traps are checked for common faults, then drainage performance is assessed to identify restriction or blockage. If a blockage is found, it is cleared and the flow is re-tested to confirm the problem has been resolved.

After the investigation

You will be told what caused the odour, what was done on the visit, and any steps to reduce the risk of repeat issues. Where the smell is linked to a bigger drainage defect or ventilation problem, you will get clear next-step options so you can decide how to proceed.