Trash compactors; central vacuum systems comprising electric power units, electric power brushes, vacuum brushes, crevice tools, dusting brushes, bags for use with vacuum cleaners, suction nozzles, hoses, turbine brushes, wands, upholstery tools, hard floor tools, brush tools for pet hair, tool caddies, extension cords, protective hose sleeves, mufflers, hose wall inlets, dust pan inlets and trim plates, plastic tubing and tubing fixtures, and parts and fittings for the foregoing