Suction filter with hose nipple and ring for connection of a float. Suitable to be installed at the beginning of the suction pipe in rainwater collection tanks or in any case where it is necessary to filter the water suctioned by a hydraulic pump, preventing impurities from getting into the electric pump and damaging it. Made entirely of Aisi 304 stainless steel, it guarantees a generous filtering surface so as not to penalise the performance of the pump to which it is connected.