Bathtub
A large watertight vessel in which a person sits or reclines to bathe, usually filled with water.
Bathtub materials: Materials used to make bathtubs include enamelled steel, cast iron, acrylic, and fiberglass. Material determines the tub’s weight, surface, heat retention, and maintenance needs.
Bathing: The act of washing the body, commonly using water in a tub or shower. A bathtub is designed primarily for bathing while seated or reclining.
Indus Valley Civilization: A Bronze Age civilization whose cities included sophisticated water and drainage systems. Its Great Bath is among the earliest known large-scale bathing structures.
Shower: A bathing fixture that sprays water over a standing or seated person. A shower rinses the body with flowing water rather than immersing it.
Bathtub drain: A plumbing outlet that carries water from a bathtub into a waste pipe. The drain empties the vessel after bathing.
Bath salts: Water-soluble mineral salts added to bathwater for fragrance or skin-care purposes. They are commonly dissolved in bathtub water during a bath.
Great Bath of Mohenjo-daro: A large, waterproofed public bathing tank built at Mohenjo-daro in the Indus Valley during the Bronze Age. It shows ancient water-retaining construction on a scale related to bathing vessels.
Hot tub: A large heated pool or vessel designed for soaking, often with circulating jets. Unlike an ordinary bathtub, it is usually built for prolonged soaking and shared use.
Overflow drain: A secondary bathtub outlet that directs excess water into the drain system before it spills over the rim. It limits flooding when the tub fills beyond its intended level.
Hydrotherapy: The use of water in treatment or rehabilitation, including immersion in warm water. A bathtub can provide a setting for therapeutic soaking.