Abstract: A disposable liquid dispensing module in the form of a hollow plastic container for holding liquid, such as a cleaning solution or soap, has at least one liquid level sensing probe permanently mounted in it. The module is made to be inserted into a lavage machine or similar apparatus and includes a connector to which a connection plug having a liquid withdrawal pipe and connectors to the liquid level sensing probe is attached. The pipe is connected to an elongated flexible tube and the connectors for the liquid level sensing probe are connected to flexible wires, so that the plug including these components may be attached to the container outside the lavage machine in which it is used. When the level of liquid falls below a predetermined threshold, a signal is provided to the apparatus indicating that replacement of the container is to be made. The entire module then is withdrawn and the plug to the apparatus is disconnected.

Abstract: A system which is particularly useful for use with lavage hand and arm washing machines supplies pulsating jets of water alternately to a first bank of nozzles (for the right hand) and a second bank of nozzles (for the left hand) without causing on/off shocks to be applied to the water supply system. This is accomplished by supplying the water from the water supply (either from a pump and reservoir or a municipal water supply) to the inlet of a rotating distributor located inside a housing. Outlet pipes for the two banks of nozzles are located on diametrically opposite sides of the housing and communicate with the interior. The distributor is designed to increase the flow through one of the outlets while simultaneously decreasing the flow to the other outlet by a corresponding amount, in a manner which produces a sinusoidal pulsation of the water flow out of each of the banks of nozzles. The flow through the first bank of nozzles, however, is 180.degree.