Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1998-02-13
1999-06-29
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
1372161, 285 12, 285331, E03C 110
Patent
active
059154063
ABSTRACT:
An air gap device for a water softener system, the device having depending inner and outer skirt portions adapted to engage the inner and outer surfaces of an upstanding relatively small standard size waste standpipe, the outer skirt portion also being adapted to engage the inner surface of an upstanding relatively large standard size waste standpipe.
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patent: 4722556 (1988-02-01), Todd
patent: 4856121 (1989-08-01), Traylor
patent: 5176165 (1993-01-01), Traylor
patent: 5305778 (1994-04-01), Traylor
patent: 5592964 (1997-01-01), Traylor
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