This rugged, positive displacement, Heavy Duty pump is UL listed. Explosion proof UL listed 1/3 HP motor (115 VAC-60Hz) with sealed bearings, Heavy Duty switch, thermal overload protection and junction box. Carbon vanes and ceramic/carbon seal reduce wear and repair expense. Integral check valve with pressure relief on outlet side reduces pressure drop and improves vertical lift. Easy removable strainer, automatic bypass valve, 2 in. threaded bung for tank openings.