Plumber Glossary

  • ABS: Acrylonitrile Butadiene Styrene, a type of plastic pipe used in plumbing.
  • Air gap: A physical separation between the water outlet and a receiving vessel.
  • Backflow: The reverse flow of water in a plumbing system.
  • Ball valve: A valve that controls the flow of liquid with a ball-shaped disk.
  • Check valve: A valve that allows fluid to flow in one direction only.
  • Compression fitting: A type of fitting used to join pipes or tubing.
  • CPVC: Chlorinated Polyvinyl Chloride, a type of plastic pipe used for hot water lines.
  • Diaphragm: A flexible membrane used in valves.
  • Diverter valve: A valve that directs water flow to different outlets.
  • Drain: A pipe or channel that carries wastewater away.
  • Effluent: Treated wastewater discharged from a septic system.
  • Expansion tank: A tank used to accommodate excess water volume due to thermal expansion.
  • Faucet: A device for controlling the flow of water.
  • Fixture: A device connected to a plumbing system (e.g., sink, toilet).
  • Flange: A projecting rim or edge used to strengthen or attach something.
  • Float valve: A valve that controls the level of water in a tank or cistern.
  • Gasket: A seal or packing used to prevent leakage.
  • Greywater: Wastewater from baths, sinks, and washing machines.
  • Heat exchanger: A device used to transfer heat from one fluid to another.
  • Hydro jetting: High-pressure water cleaning of pipes.
  • Inlet: A pipe or valve through which fluid enters a device.
  • Jet pump: A pump that uses high-pressure jets of water to move fluids.
  • Lift station: A sewage pumping station.
  • Manifold: A pipe or chamber branching into several openings.
  • Nipple: A short length of pipe used to connect fittings.
  • Overflow pipe: A pipe that prevents flooding by diverting excess water.
  • PEX: Cross-linked Polyethylene, a flexible plastic tubing used in plumbing.
  • P-trap: A curved section of pipe that traps debris to prevent sewer gases from entering the building.
  • Pressure regulator: A valve that controls water pressure.
  • Pump: A device that moves fluids.
  • Riser: A vertical pipe that supplies water to a fixture.
  • Sewer line: A pipe that carries wastewater to the sewer system.
  • Shut-off valve: A valve used to stop the flow of water.
  • Soldering: Joining metal pipes using a melted filler metal.
  • Sprinkler system: A system for distributing water over a large area.
  • Stop valve: A valve that controls the flow of water to a fixture.
  • Sump pump: A pump used to remove water that has accumulated in a sump basin.
  • Tap: A device for drawing water from a pipe.
  • Tee fitting: A fitting shaped like the letter “T” used to join three pipes.
  • Thermostatic valve: A valve that maintains a constant temperature.
  • Thread sealant: Material applied to pipe threads to prevent leakage.
  • Trap: A device that prevents gases from entering a building.
  • Union: A fitting that allows easy disconnection of pipes.
  • Vacuum breaker: A device that prevents backflow into the water supply.
  • Valve: A device used to control the flow of fluid.
  • Vent pipe: A pipe that allows air to enter a plumbing system.
  • Washer: A thin disk used to form a watertight seal.
  • Water hammer: The banging noise in pipes due to sudden pressure changes.
  • Water meter: A device that measures water usage.
  • Water softener: A device that removes minerals from water.
  • Y fitting: A fitting shaped like the letter “Y” used to join pipes.
  • Auger: A tool used to clear blockages in pipes.
  • Baffle: A device used to regulate the flow of fluid.
  • Bleed valve: A valve used to release trapped air in a system.
  • Boiler: A device used to heat water.
  • Brazing: Joining metal pipes using a filler metal with a higher melting point than solder.
  • Catch basin: A reservoir for collecting surface water runoff.
  • Circuit vent: A vent that serves multiple fixtures.
  • Cleanout: A removable plug that allows access to a drain.
  • Condensate: Water that collects as droplets on a cold surface.
  • Copper pipe: A pipe made from copper, used in plumbing.
  • Cross connection: A connection between potable water and a non-potable source.
  • Dip tube: A tube inside a water heater that sends cold water to the bottom.
  • Drain snake: A flexible auger used to clear blockages in drains.
  • Expansion joint: A joint that allows for movement due to thermal expansion.
  • Ferrule: A ring or cap used to form a watertight seal.
  • Frost-proof faucet: A faucet designed to prevent freezing in cold weather.
  • Galvanized pipe: A steel pipe coated with zinc, used in plumbing.
  • Hose bib: An outdoor faucet connected to a hose.
  • In-line valve: A valve installed directly in a pipe.
  • Lead-free: Materials that do not contain lead, used in plumbing fixtures.
  • Low-flow fixture: A fixture designed to conserve water.
  • Macerator: A device that breaks down waste into smaller pieces.
  • Non-return valve: A valve that prevents reverse flow.
  • O-ring: A round rubber seal used to prevent leakage.
  • Pilot light: A small flame that ignites a larger burner.
  • Pipe wrench: A wrench used for gripping and turning pipes.
  • Plumber’s tape: A thin white tape used to seal pipe threads.
  • Polyethylene: A type of plastic used in plumbing pipes.
  • Pressure relief valve: A valve that releases excess pressure.
  • Radiator: A device that transfers heat from one medium to another.
  • Reducer: A fitting that connects pipes of different sizes.
  • Septic tank: A tank used to treat wastewater from a building.
  • Shower valve: A valve that controls the flow and temperature of water in a shower.
  • Sillcock: An outdoor faucet with a long spout.
  • Solder: A metal alloy used to join pipes.
  • Stem: The part of a valve that opens and closes.
  • Stop and waste valve: A valve used to drain water from a pipe.
  • Teflon tape: A type of plumber’s tape made from PTFE.
  • Thermostat: A device that regulates temperature.
  • Threaded fitting: A fitting with threads for connecting pipes.
  • Trap primer: A device that maintains water in a trap.
  • Utility sink: A large, deep sink used for heavy-duty tasks.
  • Vitreous china: A ceramic material used in plumbing fixtures.
  • Wall hydrant: An outdoor faucet with a valve inside the wall.
  • Waste pipe: A pipe that carries waste away from a fixture.
  • Water closet: A toilet.
  • Water hammer arrestor: A device that absorbs the shock caused by water hammer.
  • Water main: The primary pipe supplying water to a building.
  • Yoke: A part of a faucet or valve assembly.