The Aurora 326A is a superior commercial in-line pump based on the Aurora pump 320 series. The Aurora 326A in-line's rugged design engineered specifically for commercial applications, give it the advantage over competitive models. Aurora 326A Commercial Pump Upgraded Design Features: • Quieter operation with pump inlet straightening vane and Aurora Pump's unique low vibration and low noise engineered motor. • Direct flange-to-flange compatibility allows installer to replace competitors pumps without time consuming piping and companion flange modifications. • Hydrostatic tested pump casing to 1.5 times the maximum operating pressure. • This compact pump is supported by the in-line piping thus allowing quick installation. • Vacuum cast bronze impeller, (rather than plastic or stamped brass) for maximum efficiency and durability. • Reduced spare parts - One seal and one motor design (GA) fits all pump models. • Tapped suction and discharge gauge ports to verify pump performance as well as (3) casing drain port locations. • Available in standard or build-to-order versions for optimum pump selection flexibility. • Cast iron bronze fitted (standard), or optional all bronze/all iron constructions available. Features that make the Aurora 326A superior to the competition: • Enlarged motor bearings with high temperature lubrication require no maintenance. • Standard seal flush line assures proper mechanical seal lubrication and automatically vents air from the seal chamber for trouble-free operation. • Stainless steel .75" (22mm) diameter oversized pump shaft for minimal shaft deflection, increasing mechanical seal life. • Cast companion flange set packed with the pump (rather than stamped steel flanges). • Integral pump/motor shaft eliminates premature nuisance failures due to spring type couplings or shaft extensions.