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| Brass | ancient alloy, composed primarily of copper and zinc, used in the manufacture of faucets and other plumbing fittings. Small amounts of other alloying materials are also added for various types of brass to address the requirements of specific applications. Also the term for a faucet finish. |
| copper | used for plumbing piping and is one of the components used to make the alloy brass, a key material in the manufacture of faucets and fittings. |
| fitting | a device designed to control and guide the flow of water. Examples include faucets, shower heads, shutoff valves, shower valves, and drinking fountain spouts. |
| fixture | a device for receiving water and/or waste matter that directs these substances into a sanitary drainage system. Examples include toilets, sinks, bathtubs, shower receptors, and water closet bowls. |
| GPM (gallons per minute) | a measure of the rate at which water flows through a fixture or fitting at a certain pressure. it is measured by the number of gallons flowing from the device in a one minute at a given water supply pressure. |
| GPF (gallons per flush) | a measure of the total volume of water required to flush a water closet or urinal, measured in gallons. |
| lavatory | while sometimes used to mean bathroom or washroom, the plumbing industry uses it to mean washbowl or basin permanently installed with running water. "Sink" refers to kitchen sinks. |
| PMI (Plumbing Manufacturers Institute) | a not-for-profit trade association of plumbing products manufacturers. Member companies produce most of the nation's plumbing products. |
| valve | a fitting with a movable part that open or closes one or more passages and thereby allows a liquid flow to be started, stopped, and regulated. In plumbing, used in faucets and showers, and can be called "mixing valves" because they control the mix of hot and cold water. |
