A dishwasher for treating dishes according to at least one automatic cycle of operation, comprising: a tub at least partially defining a treating chamber for receiving dishes for treatment; a sprayer (34, 36, 38, 40) proximate to the tub to spray liquid into the treating chamber; a pump fluidly coupled between the treating chamber and the sprayer (34, 36, 38, 40) to define a circulation circuit for circulating the sprayed liquid from the treating chamber to the sprayer (34, 36, 38, 40); a housing fluidly coupled to the circulation circuit and defining a filter chamber; a rotatable filter located within the housing such that the circulated liquid passes through a filter element of the rotatable filter from an upstream surface to a downstream surface as the rotating filter rotates; characterized by: a diverter extending along and spaced away from at least a portion of at least one of the upstream and downstream surfaces (120, 122) to define a gap between the diverter and the filter element of the rotatable filter; and a diverter mount operably coupling the diverter to the rotatable filter such that there is only a one tolerance stack up between at least one portion of the diverter and one portion of the rotatable filter that defines the gap, with the at least one portion of the diverter abutting the one portion of the rotatable filter to form the one tolerance stack up and define the gap between the diverter and the filter element of the rotatable filter. a tub at least partially defining a treating chamber for receiving dishes for treatment; a sprayer (34, 36, 38, 40) proximate to the tub to spray liquid into the treating chamber; a pump fluidly coupled between the treating chamber and the sprayer (34, 36, 38, 40) to define a circulation circuit for circulating the sprayed liquid from the treating chamber to the sprayer (34, 36, 38, 40); a housing fluidly coupled to the circulation circuit and defining a filter chamber; a rotatable filter located within the housing such that the circulated liquid passes through a filter element of the rotatable filter from an upstream surface to a downstream surface as the rotating filter rotates; characterized by: a diverter extending along and spaced away from at least a portion of at least one of the upstream and downstream surfaces (120, 122) to define a gap between the diverter and the filter element of the rotatable filter; and a diverter mount operably coupling the diverter to the rotatable filter such that there is only a one tolerance stack up between at least one portion of the diverter and one portion of the rotatable filter that defines the gap, with the at least one portion of the diverter abutting the one portion of the rotatable filter to form the one tolerance stack up and define the gap between the diverter and the filter element of the rotatable filter. a diverter extending along and spaced away from at least a portion of at least one of the upstream and downstream surfaces (120, 122) to define a gap between the diverter and the filter element of the rotatable filter; and a diverter mount operably coupling the diverter to the rotatable filter such that there is only a one tolerance stack up between at least one portion of the diverter and one portion of the rotatable filter that defines the gap, with the at least one portion of the diverter abutting the one portion of the rotatable filter to form the one tolerance stack up and define the gap between the diverter and the filter element of the rotatable filter.