A residential water pump is an essential part of a home. This device pushes water through plumbing to provide running water. This pump is usually preset at 40 or 60 psi, and is connected to a pressure gauge on the well. The switch activates the pump when the water pressure drops below this level. Residential Water Pumps can be used to supply water to a dishwasher, washing machine, and outdoor faucets. A typical household needs eight to twelve gallons of water per minute, or more, depending on the amount of water they use.