Swimming pool water recirculation system

In a swimming pool water recirculation system including conduit means connecting one or more drain openings in the pool with an inlet thereto, a pump in the conduit means for recirculating water from each drain opening to the inlet, and a filter in the conduit means downstream of the pump, the improvement comprising a screen across a passageway forming a continuation of the drain opening, cutter means including at least one blade mounted for rotation across the upstream side of the screen, and a rotor body including helical blades closely rotatable within the passageway and connected to the cutter blades for rotating them with the rotor body responsive to the flow of water through the passageway.

An assembly installed within and removable from the drain opening of a swimming pool recirculation system, comprising a housing adapted to be seated within the drain opening and having a passageway therethrough which, when the housing is so seated, forms a continuation of the drain opening, a screen mounted across the passageway of the housing, cutter means including at least one blade connected to the shaft for rotating across the upstream side of the screen, and means including rotor blades connected to the cutter blades for rotating closely within the passageway on the downstream side of the screen in response to the circulation of water therethrough.