PUMP VOLTS: 115v. AMPERES: 6-amps. HORSE POWER: 0.5. DISCHARGE SIZE: 2-inch. MAXIMUM HEAD (LIFT): 36-feet. MAXIMUM G.P.M.: 50-gpm. ELECTRICAL CABLE: 33-feet. WEIGHT: 26 lbs. WIDTH: 7.1-inches. This pump self primes over 4 inches of water. Water that is less than 4 inches has to be primed. Simply pour water into the top of the unit and it will pump down to one twelfth of an inch. 1/12th of an inch - which makes it almost zero.