What are the requirements that must be met for the installation of a potable water system?

Installation of a potable water system

• Every water service pipe must be provided with a shut-off valve where the pipe enters the building.
• A water distribution system must be installed so that the system can be drained or blown out with air
• Every fixture supplied with hot and cold water controls must have the hot water control on the left and the cold water control on the right.
• Every water closet must be provided with a shut-off valve on the water supply pipe.
• Every pipe that passes through an exterior wall to supply water (i.e., lawn service) must be provided with a frost-proof hydrant or a stop-and-waste valve placed inside the building close to the outside wall or other approved location. Also, a hose bib vacuum breaker must be installed on a hose bib located outside a building or inside a garage to protect against backflow.
• Every hot water tank must be provided with a shut-off valve and a pressure and temperature relief valve. The pressure and temperature relief valve must be designed to open when the water pressure in the tank exceeds the rated working pressure of the tank or when the water temperature exceeds 99°C (210°F). Every temperature and pressure relief valve must be provided with a drain and the drain must extend to within 300 mm (12 in.) of the floor or to a safe location