Young Red Haired Girl In The Bathtub

Whirlpool tubs first became popular in America during the 1960s and 70s. A spa or hot tub is also called a "jacuzzi" since the word became a generic after plumbing component manufacturer Jacuzzi introduced the "Spa Whirlpool" in 1968. Air bubbles may be introduced into the nozzles via an air-bleed venturi pump.
History of bathing
Documented early plumbing systems for bathing go back as far as around 3300 BC with the discovery of copper water pipes beneath a palace in the Indus Valley Civilization of ancient India. Evidence of the earliest surviving personal sized bath tub was found on the Isle of Crete where a 5-foot (1.5 m) long pedestal tub was found built from hardened pottery. This tub is the most likely forefather of the classic 19th century clawfoot tub.