The CP Water Subdrive 75 from Franklin Electric provides constant water pressure by continually adjusting the pump speed to meet water demand and also eliminates pressure cycling during long-running applications such as lawn sprinkling and geothermal heat pump operation. The Subdrive 75 uses a standard 3⁄4-HP pump and a 11⁄2-HP, 3-phase motor, and is used on applications including residential water systems, geothermal systems, lawn irrigation systems and water treatment systems. Franklin Electric