Patent ID: 7533426

Claim:
A gray water interface valve system for use with a vacuum source and a collection tank, comprising: (a) a basin for collecting gray water, the basin having an outlet; (b) a reservoir in fluid communication with the outlet, the reservoir adapted to house gray water; (c) a vent line associated with the reservoir; the reservoir and the vent line positioned side-by-side and in fluid communication via a reservoir hole located on a lower side portion of the reservoir, such that gray water entering the reservoir flows into the vent line through the reservoir hole and fills the reservoir and vent line simultaneously; (d) a pressure switch associated with the reservoir, the pressure switch adapted to signal when the reservoir is full; (e) a controller associated with the pressure switch, the controller adapted to begin a discharge cycle by checking and switching on the vacuum source if necessary; (f) a solenoid valve activated by the controller in order to control the flow of vacuum through the system; and (g) a drain valve adapted to open via vacuum pressure and evacuate gray water from the vent line and the reservoir, the vent line emptying more quickly than the reservoir due to the reservoir hole, wherein the drain valve is adapted to close before all of the gray water from the reservoir is emptied.