(A) Reduced pressure principal (RPPA) and reduced pressure detector (RPDA) containment assemblies are NOT allowed to be installed below ground level.
(B) Assemblies installed in above ground approved enclosures shall be installed so that the relief outlet of the assembly does not become submerged.
(C) A minimum clearance of 12 inches must be maintained from the most bottom part of the assembly to concrete pad or floor.
(D) Drain size shall be twice the diameter of the containment assembly relief port, or four inches minimum, whichever is greater, and must provide a means of positive drainage with adequate gravity drainage to atmosphere.
(E) In some applications, it is practical to install a drain line off of the relief port of the assembly so that in the event that there is some spillage from the device the water can be directed to a floor drain. When drains from the relief port of an approved containment RPPA/RPDA are utilized, the following conditions must be met:
(1) An approved, prefabricated "air gap drain" as available from backflow prevention assembly manufacturer must be utilized.
(2) All relief port drain lines shall be piped to an outside point of termination.
(Ord. 24-O-02, passed 2-26-2024)