Plumbing, water supply, and drainage system are three related services that are crucial for the proper functioning of residential and commercial buildings.

Plumbing: Plumbing refers to the system of pipes, valves, and fittings used for the distribution of water and the removal of waste in buildings. Plumbers install and repair these systems, which can include water heaters, faucets, toilets, showers, sinks, and other fixtures. Plumbing systems require regular maintenance to ensure that they are functioning correctly and to prevent leaks, clogs, and other problems.

Water supply: Water supply refers to the delivery of clean, potable water to buildings. This service is provided by water utility companies or municipalities and typically involves the treatment and distribution of water to homes and businesses. Water supply systems may include pipes, pumps, reservoirs, and other components to ensure that water is available and safe for consumption.

Drainage system: Drainage systems are responsible for the removal of wastewater and other liquids from buildings. This system includes pipes, fittings, and other components that transport water and waste to the sewer or septic system. Drainage systems are essential to prevent flooding, sewage backup, and other health hazards that can result from poor drainage.

Overall, plumbing, water supply, and drainage system are interconnected services that ensure the proper functioning of buildings and promote public health and safety.