The duties of the office involved waiting on the king when he ate in private, helping him to dress, guarding the bedchamber and water closet, and providing companionship.
en.wikipedia.org He was, however, in the forefront of the industry in the late 19th century, and held nine patents, three of them for water closet improvements such as the floating ballcock.
en.wikipedia.org They jammed the toilet under the stairs or in a closet (source of water closet name) and they built the sink into the wooden washstand.
www.treehugger.com Although the water closet was used in wealthy homes, concerns over river pollution, costs and available water supplies meant that most towns and cities chose more labour-intensive dry conservancy systems.
en.wikipedia.org More common is a primer that is connected to the potable water supply and activates when pressure fluctuations are sensed, such as the flushing of a nearby water closet.
en.wikipedia.org