Abstract: A system is provided for converting conventionally hanger-hung gutters fixedly disposed to receive water from building roofs to a gutter system wherein the gutters are selectively movable between water receiving dispositions and overturned dispositions to facilitate dumping debris from the gutters. The system entails securing first portions of gutter mounting brackets in spaced relationship along the length of the gutter proximate the lower edge of the gutter front wall and securing a second portion of the gutter mounting brackets to the building facia while the gutters are still secured to the building by the conventional gutter hangers. A pivot pin connects the mounting bracket first and second portions to permit the selective gutter movements. Selective movement of the gutters is effected by use of a rod operated by a person standing on the ground beneath the gutters and the application of force in selected manner to the gutter.