Common signs of a blockage
Water draining slowly from one fixture may point to a local restriction. Several fixtures affected together, gurgling sounds or wastewater backing up can suggest a problem farther along the drainage system.
When to stop using the affected drain
If wastewater is backing up or overflowing, minimise use of connected sinks, toilets and appliances until the issue is assessed. Avoid contact with sewage and keep children and pets away from contaminated areas.
Who is responsible?
Responsibility can depend on whether the affected pipe is a private drain, a shared lateral drain or a public sewer. Your water and sewerage company can explain responsibility for public sewers; a drainage professional can help locate a private issue.
What a contractor may do
Depending on the problem, a contractor may inspect accessible chambers, use suitable clearing equipment or recommend a CCTV survey for recurring blockages. Ask for an explanation of the suspected cause and the proposed work before agreeing to charges.