OCCUPANT SUPPORT PLUMBING SYSTEMS.

The basic occupant support plumbing systems are sanitary and waste drainage discharging into a sanitary sewer, vent, storm water drainage, and potable water (cold water, hot water, and hot water circulation). Plumbing systems directly affect the health and safety of the public and are distinguished from other piping systems by the following requirements:

• The design, materials, and installation of the systems are directly regulated by a plumbing code. System design must be approved by an authorized plumbing code official charged with assuring code compliance.
• A permit for installation of the systems must be obtained from authorities having jurisdiction (AHJ).
• Systems should be installed by an entity duly licensed by local authorities to install plumbing systems. (This may not be required in some jurisdictions.)
• Plumbing design plans and installed systems are required to be inspected and approved by an authorized code official charged with code enforcement.