Pump for filtration in swimming pools filled with salt water and chlorine or fishing farms in residential building service or commercial building service. Pre-filter cover in transparent polycarbonate with butterfly caps. The impeller is made of technopolymer reinforced with glass fibers or marine bronze depending on the model. Technopolymer pump body with flanged suction and delivery connections. Pump support base with rubber feet to reduce vibrations. Motor case in die-cast aluminum. Pump capable of ensuring high flow rates. Asynchronous motor with 2 or 4 poles. Mechanical seal in AISI 316 stainless steel.