Bathtubs are used for bathing and soaking in commercial, residential, and institutional restrooms. Alcove tubs, or recessed tubs, are installed adjacent to three walls with one finished side. Drain location is the right or left end of the tub depending on plumbing requirements. Bathtub doors are used to enclose the bathtub area to keep water from damaging the walls or floors. Bathtub faucets are generally mounted on the tub's deck or on the wall above the tub. Bathtub overflow plates prevent tubs from overflowing. Bathtub spouts and fillers deliver hot and cold water to bathtubs.