alloy of copper and tin. For special purposes other metals such as phosphorus, lead, zinc, silicon, or aluminum are added. Most bronze alloys resist corrosion.

a composite pipe with an aluminum alloy core, having on one or both surfaces a metallurgically bonded aluminum or aluminum alloy layer that is anodic to the core alloy to which it is bonded, thus electrolytically protecting the core alloy against corrosion.

same as a caulking iron except that the force from the impactor is directed in a non-straight line. Offset irons are made in left and right versions.

the residual pressure in the water supply pipe at a faucet, pressurized flushing device, water outlet, or other endpoint device when in an open and flowing condition.

a valve in which the opening, consisting of a small hole, is opened or closed by a long, needle-like spindle that is thrust into or is withdrawn from the hole. Used where the fine control of liquids is required.

a device operated either electrically, by other power or other mechanical means so constructed as to elevate liquids from a lower level to a point of discharge.

a point on a backflow prevention device or vacuum breaker that is usually stamped on the device by the manufacturer to specify the minimum elevation above the flood level rim of the fixture served. A plumbing code term.