A plumbing tool that mounts an adapter of a garbage disposal to a sink, wherein the adapter of the garbage disposal includes an upper mounting ring with a trio of screws, a backup flange, a fiber gasket, a sink flange, and a snap ring. The plumbing tool includes a lower portion, an upper portion, and an apparatus. The apparatus selectively draws the lower portion to the upper portion to capture the adapter of the garbage disposal therebetween and thereby mount the adapter of the garbage disposal to the sink.