The Vevor diaphragm water pump delivers up to 4 GPM flow with a maximum pressure of 45 PSI for reliable on-demand water transfer. Its automatic pressure switch starts the pump when water is needed and stops it when flow is shut off. The 3-chamber design and pure copper motor help reduce vibration and keep operation quiet. Built-in overheat and overload protection support dependable daily use for irrigation, kitchen water boosting, faucets, and similar applications. This pump is designed for indoor or sheltered use and is not waterproof.