NAC445A.66315. “Reduced pressure principle assembly” defined.

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“Reduced pressure principle assembly” means an assembly that:

     1. Contains:

     (a) Two independently acting approved check valves; and

     (b) A hydraulically operating, mechanically independent pressure relief valve that is located between the approved check valves and below the upstream check valve;

     2. Has properly located, resilient, seated test cocks and tightly closing, resilient, seated shutoff valves at each end of the assembly;

     3. Is designed to protect against pollution and contamination under conditions of backsiphonage or backpressure; and

     4. Has been tested and approved, in accordance with American Water Works Association Standard C511, by an approved backflow testing laboratory.

(Added to NAC by Bd. of Health, eff. 2-20-97)

                    
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