a priming system for preventing air - locking for use on a centrifugal pump having a priming system with a two piece detachable design . this permits the upper portion of the priming system to be removed for routine maintenance . the lower portion of the priming system includes a plurality of primary stationary vanes located longitudinally in the flow path of multi - phase fluids which permit the removal of trapped air . additional removable secondary vanes are located in the flow path after the primary stationary vanes and prior to the intake structure of the centrifugal pump housing . such multiple vane structure allows the centrifugal pump to pump multi - phase fluids during a wide variety of conditions without air - locking and without requiring any modifications to the centrifugal pump impeller .