There are various technological sectors where the filtration of significant quantities of water is required in order to remove suspended solids, including those of a colloidal nature (silt, sand, etc.) which could cause problems for hydraulic systems (valves, pumps, equipment). This need becomes particularly pressing when the sources of water supply are: rivers, lakes, canals, wells. In all these cases the use of filters from the ROTOR Y series becomes the ideal solution. ROTOR Y filters are Y-shaped filters with filter cartridge and automatic mechanism with special suction pads that guarantee effective cleaning of the filter element with reduced water consumption and without flow interruption. The water to be treated feeds the filter through the inlet connection, passes through the filter element from the inside to the outside and flows to the outlet connection. Suspended solids and silt remain retained in the internal part of the filter element. During the filtration phase the drain connection remains closed.