teeth of gear 306 likewise the circumferential length of the inter tooth spacing 314 and 316 between adjacent teeth of each of the gears corresponds to the circumferential length of the teeth of the other gear or rotor element that is the inter tooth spacing of the teeth of each gear is a distance that will accommodate the corresponding teeth of the other gear thusly configured the inter tooth volume of each of the gears is different therefore liquid is pumped by each gear at a different flow rate as illustrated here liquid is pumped out of storage tank 322 by gear 306 at a higher flow rate than liquid is pumped out of storage tank 320 by gear 308 the flow rate ratio is determined by the size of the inter tooth spacing of each of the gears although pumping at a flow rate ratio that will empty both of the storage tanks at substantially the same time may be preferred substantially any flow rate ratio may be established according to the requirements of a particular application such that either of the tanks may be emptied before the other a ninth preferred embodiment of a system of the present invention as illustrated in fig1 is configured with a gear pump 230.