3-stage vac pump/jet system 1st stage: Stokes CS rotary vac pump, Mdl 310-41, SN 87533. W/4" suction and discharge opening. Powered by 2 HP, 3/50/60/208/230/460 volt, 2870/3480 rpm direct coupled motor. 2nd stage: Hick and Hargreaves CS vac jet, Order #CA13305. Nozzle throat dia 5.2mm. 3rd stage: Hicks water ring vac pump. SN H9126, Type SHR2200. 1470 rpm. 2" suction and discharge openings. W/solenoid operated inlet water piping and Burgess Manning water separator on discharge. Powered by 20 HP, 3/60/230/460 volt, 1760 rpm direct coupled TEFC motor.