New construction

Companies that produce metal plumbing fixtures and parts make up the plumbing fixture and fittings industry. This classification also encompasses establishments engaged in the assembly of plastic components into fixtures and fittings. Companies that manufacture plastic, ceramic, earthenware, and other types of plumbing fixtures are classified in separate industries, as are firms that make steam or water line valves.
Several different systems make up a house's plumbing. Fresh water is delivered to a home through water supply pipes from the utility or a well and is then distributed to sinks, toilets, washers, bathtubs, and related fixtures. The drain-waste- vent system carries away used water and wastes to sewers or septic tanks. Natural-gas plumbing delivers this fuel to gas-burning cook tops, furnaces, water heaters, and clothes dryers. For information on water heaters, see Water Heaters.