Abstract: A portable hand-washing station having a base, at least one sink thereabove, a grey-water storage tank in the base, and a suction tube extending from an inlet end thereof within the grey-water storage tank upwardly and from there downwardly to an outlet end thereof at a bottom portion of the base, the suction tube having a check valve in it which has a cracking pressure sufficient to prevent flow from the grey-water storage tank through the suction tube without application of suction at the outlet to overcome the cracking pressure.

Abstract: A portable dual-sink hand-washing station which includes a base supporting a sink structure thereabove, the sink structure defining an upper surface area, and a station top supported above the sink structure and having a vertical support structure defining a diagonal divide of the upper surface into two sections, each section having a sink opening with a rear edge along the vertical support structure such that each sink opening has a larger end and a smaller end, whereby each larger end provides increased clearance for hand-scrubbing. At least one of the sink openings has an increased maximum length to accommodate forearm-scrubbing. Various embodiments with preferred features are also disclosed.

Abstract: A portable hand-washing station having a base, at least one sink thereabove, a grey-water storage tank in the base, and a suction tube extending from an inlet end thereof within the grey-water storage tank upwardly and from there downwardly to an outlet end thereof at a bottom portion of the base, the suction tube having a check valve in it which has a cracking pressure sufficient to prevent flow from the grey-water storage tank through the suction tube without application of suction at the outlet to overcome the cracking pressure.