The handbook provides brief information on the operation of water supply, sewerage and gas supply systems mainly for settlements. The rules for acceptance of systems for operation are covered, issues of automation and dispatching of control of water supply, sewerage and gas supply systems, scheduled preventive inspections and repairs, control over the operation of structures are considered. Attention is paid to reliability, durability and efficiency of the systems. 3rd ed. updated with new regulatory documents and a new section on system reliability.