NAC445A.6595. “Flapper valve” defined.

Latest version.

“Flapper valve” means a formed or machined covering for the opening at the end of a pipeline that:

1. Is suspended from the top of the pipe; and

2. Opens and closes by rotating about a hinge in a manner that allows the valve to close under the influence of gravity.

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

                    
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