A pet sanitation device provides a litter-containing basket in a housing. After a pet uses the device, the housing and basket are filled with water to dissolve waste in the litter, thus producing wastewater. The basket is then caused to spin about a central axis in the housing, and the spinning motion produces centrifugal forces that force the wastewater outward from the basket and into the space between the basket and the housing. The wastewater is drained from the housing, leaving the device ready for a subsequent use.