Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1992-12-31
1994-04-26
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
1372161, 137360, E03C 112
Patent
active
053057783
ABSTRACT:
An air gap apparatus for plumbing applications such as reverse osmosis (RO) units and other systems in which reject water empties at a relatively slow rate into a drain line. The apparatus can be incorporated in an under-the-counter unit or in a countertop embodiment which eliminates umbilical connections between the RO unit and the kitchen faucet and sink drain. The apparatus has a conventional air gap to protect against back siphoning and against high velocity backflow from the drainage line. It uses a deflector wall in combination with a supplemental opening and one or more backflow restrictors to slow and shunt any backflow to atmosphere. Different styles of countertop and wall mount installations are disclosed, as well as various deflector walls and back flow devices.
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McLellan Joseph F.
Michalsky Gerald A.
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