Prime Aire Plus pumps from Gorman-Rupp Company employ the same venturi/compressor priming system as the Prime Aire Line, with increased head, flow and enhanced maintenance features. Models featuring up to 8-inch flanged discharge sizes are available, providing flows up to 4,950 gpm and heads to 475 feet, that are suitable for both clear liquids and liquids containing large solids. They are available coupled to the latest EPA Tier-compliant engines or premium efficiency electric motors. They have an integral seal oil chamber, ductile iron body and impeller, two lip seals and atmospheric vent to ensure bearing protection, oil-lubricated versus grease-lubricated bearings, the ability to fit other pumping installations, and a fuel level monitoring system (on Interim Tier 4 engine-driven models). 419/755-1011; www.grpumps.com.