SANA - Network Protection through artificial Immunity

A reservoir brush useful for washing automobiles and the like has a vacuum creating pump operable in a chamber in which an expandable bladder resides in order to draw fluid through the head of a brush to which the bladder is attached and into the bladder, wherein the chamber is vented, facilitating collapse of the bladder and run-out of the fluid when the pump is not operating, the pump including a check valve facilitating the pumping action.