Mag-Drive pumps utilize an epoxy-encapsulated motor and plastic housing. A permanent magnet is attached to the impeller and acts as the rotor would in a conventional motor. The water being pumped surrounds the rotor. They are seal-less and oil-less. 2 ft maximum pumping height. 3/8 in - 1/2 in barbed discharge. Built in flow control. 3 Watts.