Plumbing systems include both hot and cold water supply and the drainage system; they are two main, interconnected subsystems of a property's total water management. The supply subsystem delivers clean water for use, while the drainage system removes wastewater and waste materials.  

Water supply system

• Hot and cold water: This subsystem delivers fresh water to all fixtures in a building. 

• Cold water: Delivered directly from the mains or a storage tank and sent to all outlets for drinking, washing, etc. 

• Hot water: Cold water is heated and then sent to the appropriate fixtures, such as faucets and showers. 

Drainage system

• Wastewater removal: 

  This subsystem consists of pipes that carry wastewater (from sinks, toilets, and showers) and other waste materials away from the building to the sewer or septic system. 

• Vent system: 

  A crucial part of the drainage system, the vent system allows air into the pipes to ensure proper flow and to prevent sewage gases from backing up into the building.