A.Y. McDonald offers rugged submersible pumps are for residential, commercial, municipal, and industrial applications. They have a unique triple seal design and patented Contra Block® impeller with adjustable wear plate system for a clog-free operation. Single phase models are available 1/2 and 1 HP and three phase models come with 1 HP. A high torque capacitor start single phase motors and with oil filled motors (non-toxic oil). Pumps discharges at 1 1/4″ on 1/2 and 1 HP for High Head and 2″ on 1 HP standard Head.