NAC445A.6552. “Air and vacuum valve” defined.

Latest version.

“Air and vacuum valve” means a dual-function valve that allows the entrance of air into a pipe or well which is being emptied, to prevent a vacuum, and allows air to escape from a pipe or well which is being filled or is under pressure.

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

                    
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