"This rugged air-powered submersible trash pump can handle mud, leaves, twigs, sand, sludge and solids up to 1 1/2in. and is self-draining to prevent damage in cold weather. Designed to handle rough treatment and can run dry without damage. The two-vane cast-iron impeller operates at low RPM with less wear. U.S.A. Pump Housing Aluminum, Suction Type Steel strainer, Flow GPH 18,000, Volute Aluminum, Discharge Port in. 3, Max. Total Head ft. 55, Dimensions L x W x H in. 23 1/2 x 13 x 13, Solid Handling in. 1 1/2, HP 2 1/2, Seals Face-type mechanical, Self-Priming Yes, Impeller Shaft 416 SST, Max. PSI 80. 80 CFM max. air consumption Requires 1/2in. dia. air hose Fits into a 14in. opening Continuous automatic lubricating oiler"