GMP Flexa 40 Self Priming Flexible Vane Impeller Pump. Pump with flexible impeller in nitryl rubber, suitable for transferring thick and fluid liquids without emulsifying the product. Instant priming. Easy to disassemble and to clean. For food fluids, industrial clear fluids, chemical corrosive fluids, chemical fertilizing fluids, sea water. The Flexa 40 is a 1/2" inlet and outlet 0.5hp single phase pump with a flexible vane impeller this gives this small pump a fantastic suction lift for most maintainance jobs. 230v 50 hz Max flow 25 l/m Max head 20m.