This document discusses the components and operation of a basic home water supply system. It includes labeled diagrams of a water tank, piping components like valves and traps, and tools used for pipework. The water tank section explains its purpose and main parts like inlet, outlet, and overflow. Diagrams then show how the water level is regulated within the tank. Piping components like elbows, tees, and unions are also defined along with their purposes in plumbing systems.