A filter for filtering a flow of liquid, the filter comprising: (a) a pressure vessel having an inlet , an outlet and a cylindrical wall; (b) a partition deployed within said pressure vessel so as to subdivide said pressure vessel into a first filter chamber and a second filter chamber , said partition being formed with an elastomer seal for sealing against an internal surface of said cylindrical wall; (c) a first filter configuration deployed within said first filter chamber , said first filter configuration comprising a filter screen having a first opening size; (d) a second filter configuration deployed within said second filter chamber , said second filter configuration comprising a filter screen having a second opening size smaller than said first opening size, wherein liquid flowing from said inlet to said outlet passes sequentially through said first filter configuration and through said second filter configuration; and (e) an automated cleaning arrangement deployed to remove accumulated solids from said filter screens of both said first filter configuration and said second filter configuration during operation of the filter, wherein said automated cleaning arrangement comprising a backwash assembly including at least one backwash nozzle deployed for cleaning said filter screen of each of said first and second filter configurations, wherein each of said first and second filter configurations is a filter disk comprising a spacer having first and second outward-facing filter screen support configurations, and having an outlet for flow of filtered liquid inwards to a central flow path, said first and second filter screen support configurations of said spacer supporting first and second filter screens forming corresponding first and second surfaces of the filter disk, and in that the filter further comprises a flow diverter deployed in said central flow path for diverting a flow of filtered liquid passing along said central flow path from said first filter configuration so as to flow outwards from said central flow path to undergo a second filtering in said second filter chamber. (a) a pressure vessel having an inlet , an outlet and a cylindrical wall; (b) a partition deployed within said pressure vessel so as to subdivide said pressure vessel into a first filter chamber and a second filter chamber , said partition being formed with an elastomer seal for sealing against an internal surface of said cylindrical wall; (c) a first filter configuration deployed within said first filter chamber , said first filter configuration comprising a filter screen having a first opening size; (d) a second filter configuration deployed within said second filter chamber , said second filter configuration comprising a filter screen having a second opening size smaller than said first opening size, wherein liquid flowing from said inlet to said outlet passes sequentially through said first filter configuration and through said second filter configuration; and (e) an automated cleaning arrangement deployed to remove accumulated solids from said filter screens of both said first filter configuration and said second filter configuration during operation of the filter, wherein said automated cleaning arrangement comprising a backwash assembly including at least one backwash nozzle deployed for cleaning said filter screen of each of said first and second filter configurations, <EOS>