A device screwed into the end of a tap that mixes air into flowing water, and controls flow to reduce splashing. It sometimes contains a baffle to reduce flow to 2.5 gpm.

Blockage in the flow of liquid, especially on the suction side of a pump caused by an air bubble in the line.

A sacrificial rod installed in a water heater that protects the tank from corrosion, helping to extend the life of the tank.

Preventive device for the backflow of liquid into a system. Used on sprinkler systems to prevent water from trickling back into the supply that is feeding it.

Pressure that resists the flow of fluid in a piping system.

A negative pressure that causes backflow.

Backflow is the flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any sources other than its intended source.

A device to prevent water from travelling from one system back into any part of the main distribution system, usually by siphoning, especially into a potable water supply. This is generally required for sprinkler systems, handheld showers, pullout nozzle, kitchen sprayers, etc.

The overflow of a plumbing fixture due to drain stoppage e.g. a clogged toilet or a blocked.

The fill valve that controls the flow of water from the water supply line into a gravity-operated toilet tank. It is controlled by a float mechanism that floats in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the tank and/or bowl. As the water in the tank is restored, the float rises and shuts off the ballcock when the tank is full.

A wrench with a long handle with jaws mounted on a swivel that allows the jaws to reach and handle nuts to fasten faucets to a previously installed sink.

A personal hygiene plumbing fixture similar in appearance to a toilet bowl used for washing genitals and posterior areas of the body. It is mounted on the floor next to a toilet and consists of a washing basin, a hot and cold faucet, and sprayer.

To drain a pipe, tube, or hose of excess air by opening a valve at the end or systematically removing the air by force or suction.

A unit of heat energy required to raise the temperature of 1 lb. of water 1 degree Fahrenheit.

A highly poisonous gas that has no colour, taste or smell. It can be produced by any appliances burning gas, wood, oil or coal, and can kill without warning in just a matter of hours.