Storage Tank

A storage tank in a drainage system is a component designed to temporarily store excess water so it can be released in a controlled way rather than flowing straight into sewers or watercourses. In UK drainage and SuDS projects, it’s a core method of managing surface water runoff. The main functions of a storage tank are to hold rainwater during periods of heavy rainfall, thus preventing flooding downstream and reducing the pressure on public sewers. The use of storage tanks can help schemes comply with LLFA, EA, and water company requirements.