Although the difference between a single stage and a two-stage jet pump may not seem significant, it can greatly impact the efficiency of the pump. One anticipated objection to this claim may be the assumption that both pumps essentially operate in the same manner, pumping water from the well to the surface. However, a two-stage jet pump utilizes two impellers, one smaller and one larger, to increase the pressure and volume of water being pumped. This results in a higher level of efficiency and the ability to pump water from deeper wells. Comparatively, a single stage jet pump only has one impeller and is limited in its ability to pump water from deeper wells. When evaluating jet pump efficiency, it is important to consider the type of pump being used and the specific needs of the household.