Plumbers -  Plumbing
City of Napa, Napa Valley, San Francisco North Bay, Ca. USA 94558, 94559

 categories; Fixture or Appliance. As the consumption points above perform their function, most produce waste/sewage components that will require removal by the waste/sewage side of the system.

Fixtures are devices that use water without an additional source of power. They include, for example:

Hose bibbs, colloquially known as 'taps' or 'faucets'
Water closets, colloquially known as toilets or loos
Urinals
Bidets
Lavatories, sinks, and washbasins
Bathtubs and showers
Drinking fountains (uncooled or unheated)
Appliances are devices that use water coupled with an additional source of power. Each connection to these appliances incorporates a backflow prevention principle of some form -- the minimum is an air gap. See cross connection control & backflow prevention for an overview of backflow prevention methods and devices currently in use, both through the use of mechanical and physical principles. Appliances include, for example: