You see them everywhere: tote tanks with steel or aluminum cages that temporarily store a variety of liquids including waste oil, septic waste, restaurant grease trap waste and industrial fluids. What many people don’t know is that having a proper diaphragm pump to transfer liquid both into or out of the tank can make all the difference in having safe and clean pumps out versus pump outs that leave the possibility that potentially hazardous liquids may contaminate your job site or drink water.