The ATP B3J-S Clockwise, Mechanical Seal pump is a high pressure, Hydraulically driven, 4 x 3 Threaded water pump with a 13.5 Impeller. This pump is driven directly by a SAE C 4-Bolt Mounted 1 1 / 4 14 tooth Splined Shaft hydraulic motor coupled to the water pump shaft with a 116-M10176 coupling. When operating at 3,000 RPM this pump is capable of 1,150 GPM at 208 PSI and is primarily use with Off Road , larger mine tank equipment. This pump is a direct replacement for Berkeley model B73403.