SP55 is a high performance trash pump with discharge mouth 5,5” ideal in large dewatering works, in the rental activity, as “well point” pump, in the civil protection and military sector, in the sewage treatment plants and in all intervents where is necessary to move quickly large volumes of water and heavy loaded fluids. Maximum flow is 5500 L/min (330 m/cub x h) with water head up to 29 metres. The main characteristics are the high power and the impeller that has knives and can cut suspended solids like sea weeds, strow, rags, ropes, sediments and various linear fibers. The hydraulic functioning gives a long series of operatinal and performance advantages not obtainable from traditional selfpriming pumps.