20 CAR § 417-716 – Plumbing and other piping systems

(a) All plumbing systems shall be designed and installed in accordance with the requirements of the Arkansas Plumbing Code, 17 CAR pt. 65.
(b) From the cold water service and hot water tanks, cold water and hot water mains and branches shall be run to supply all plumbing fixtures and equipment which require hot and cold water, or both, for their operation.
(c) Pipes shall be sized to supply hot and cold water to all fixtures with a minimum pressure of fifteen pounds (15 lbs.) at the top floor fixtures during maximum demand periods.
(d) Water closets shall be the elongated type, and water closet seats shall be of the open-front type.
(e)
1. (1) Backflow preventers (vacuum breakers) shall be installed with any water supply fixture where the outlet's end may at times be submerged.
2. (2) Examples of such fixtures are hoses, sprays, direct flushing valves, aspirators, and under-rim water supply connections to a plumbing fixture or receptacle in which the surface of the water in the fixture or receptacle is exposed at all times to atmospheric pressure.