The Lochinvar and A.O. Smith 100166409 is a 3/4 HP bronze water heater pump designed to support efficient water circulation in compatible commercial water heating systems. It operates by moving water through the heater and connected piping, helping maintain consistent circulation and reliable heat distribution. The bronze construction provides corrosion resistance, making it suitable ... https://www.partshnc.com/100166409-lochinvar-a-o-smith-3-4hp-water-heater-pump-bronze-115-208-230v-1ph