Common causes of household blockages
Kitchen drains are commonly affected by food debris, fats and oils that can cool and collect within the pipe. Bathroom and toilet drains can be affected by hair, soap residue, wipes and other items that should not be flushed.
Outside, leaves, soil and garden debris can restrict gullies. A blockage that comes back after clearance can indicate a drainage defect, root intrusion or a section of pipe that needs inspection.
- Cool cooking fat in a container and place it in the bin rather than pouring it into a sink.
- Use strainers to catch food debris and hair before they enter the pipework.
- Only flush toilet paper; bin wipes, cotton buds and sanitary products.
- Keep external gullies clear of leaves and loose garden material.
Early signs to take seriously
Slow drainage, gurgling, unpleasant smells and water returning through another fixture can all indicate restricted flow. Multiple slow fixtures usually suggest that the issue is further along the drainage run than a single trap or waste pipe.
- Water backing up at a sink, bath or toilet
- Gurgling after using another fixture
- Overflowing external gullies or inspection chambers
- A repeat blockage in the same location
When an inspection is useful
A camera survey can help when a blockage repeats, when there is no clear source of a smell or overflow, or before a repair decision is made. It records the accessible condition of the pipework and can help distinguish a simple blockage from a structural issue.
Avoid using more water through a drain that is overflowing or backing up. Record which fixtures are affected and share any previous drainage reports when requesting an assessment.
Frequently asked questions
Can I use chemical drain cleaners?
Follow the product directions and do not mix products. If a blockage persists or affects multiple fixtures, seek professional advice rather than repeatedly adding chemicals.
Why does the same drain keep blocking?
A repeat problem can be caused by remaining deposits, root intrusion, an open joint or another defect. A camera inspection can help identify the accessible condition of the pipe.
What should I do if sewage backs up?
Avoid using fixtures connected to the affected drain, keep people and pets away from contaminated water, and contact a drainage professional to discuss the urgency.