Abstract: The present invention discloses a sink mounted dishwasher having a closure mechanism (41, 140) in the drain (15) of the sink (2). An hydraulic control system (FIG. 6) for such a dishwasher is also disclosed together with an hydraulically operated liquid detergent dispenser (47, FIG. 7). The preferred form of hydraulic fluid is liquid rinse aid. Two forms of spray arm (28, 128) are also disclosed, each with a structure (20) which enables the spray arm to be removably and rotatably mounted within the sink.

Abstract: A flooring module comprised of an upper member and a lower member to be assembled with like modules to provide a flooring, an array of parallel passageways for specific purposes in the upper member defined by bottoms and sides overlying an array of passageways for like specific purposes in the lower member lying at an angle to the passageways in the upper member and defined by bottoms and sides, and provided with communications openings between corresponding purpose passageways in the upper and lower members and further provided with discrete access means in the upper member which overlie the communication openings.