Flood level rim-The top edge of a receptacle from which water overflows.
Flushometer valve-A device that discharges a predetermined quantity of water to fixtures for flushing purposes and is closed by direct water pressures.
The unobstructed vertical distance through the free atmosphere between the outlet of a water pipe and the flood level rim of the receptacle into which it is discharging.
Air Gap (Water Distribution System) ...
air gap (coupure antirefoulement, f.) The vertical distance between the lowest point of a water supply inlet and the flood level rim of the fixture or device into which the inlet discharges.
The highest point that water can reach within a plumbing fixture without overflowing; also called Flood Level Rim.
Flooded System
Type of refrigerating system in which liquid refrigerant fills most of the evaporator.
 See also: Receptacle, Trap, Outlet, Safety, Walls
  
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