(1) Plans for a new or modified water distribution system must be approved by the regulatory authority before construction. The system must be designed to protect the water from contamination. This includes providing protection from backflow and precluding the creation of cross connections. 

(2) If individual water connections for camping units, shelter units, or mobile home spaces are provided, the following standards apply:

(a) Water riser pipes must extend at least 24 inches above ground elevation with the outlet directed downward for campgrounds, and water risers for a mobile home must extend at least four inches above ground elevation. Surface water must be directed away from the riser.

(b) Adequate provision must be made to prevent freezing of service lines, valves, and riser pipes.

(c)  Water risers must be located and constructed to minimize potential for damage from trailers. Protection may consist of posts, fences, or other permanent barriers.

(d) Stop and waste type control valves may not be installed underground.

(e) Where health hazards exist that could lead to the contamination of the water supply, the water supply must be protected against backflow or back siphonage. A backflow or back siphonage prevention device installed on a water supply system shall meet American Society of Sanitary Engineering (ASSE) or the Foundation for Cross Connection Control and Hydraulic Research (FCCCHR) standards for construction, installation, maintenance, inspection, and testing for that specific application and type of device.

(f) There must be at least ten feet of horizontal distance between a sewer line connection and a stop and waste valve.

(g) A water connection must be laid at least ten feet horizontally from any existing or proposed sewer line or in a manner allowed under the state plumbing requirements described in ARM 24.301.301.