Abstract: An off-the-floor water closet carrier is adapted to sit on flooring structure and has a waste conduit junction therein. The water closet carrier is rigidly constructed without primary reliance upon the waste conduit junction for such rigidity. The waste conduit junction is connected to receive waste from off-the-floor water closets and is also connected to pass such waste to a waste discharge conduit which is also connected to receive waste from one or more bath or shower or combination thereof. The waste discharge conduit is substantially entirely above the flooring structure upon which the water closet carrier is supported.

Abstract: A smaller building module is comprised of two parallel frames and a water closet carrier disposed between the frames and adapted to support an off-the-floor water closet on each side of the parallel frames upon each of which a wall may be constructed. Waste conduit means, hot and cold water conduits and electrical lines extending, between the parallel frames provide ready access for connection to plumbing and electrical fixtures. Additionally, gas conduits, dryer vent conduits or other utility conduits or lines may be provided. Such building module is advantageously included in a larger building module comprised of two toilets, and one or more bath, shower, lavatory or other plumbing fixtures. Either of such building modules may be conveniently constructed in a shop and then transported and set in place on a flooring structure.