The 4-MD Series features a 1/12 horsepower open FC motor with 1/2″ FNPT inlet x 1/2″ MNPT outlet and maximum head of 23.7′ capabilities. Shaft and thrust washers are titanium for excellent wear resistance and trouble-free service. Pumping heads are easily rotated, cleaned, or serviced with no special tools required. The spindle shaft is supported at both ends to prevent impeller damage during the start and stop of the pump.