Plumbing Glossary C
Now it’s time for some C-words – of the plumbing variety!
Read on for a glossary covering all of the industry terms you’re likely to hear your plumber use.
Carbonising – in a pump, where a reduction of hydrocarbons results in the formation of carbon residue that will interfere with the movement of a mechanical seal – often called coking
Cartridge – typically refers to a valve cartridge – it is a single-piece unit that replaces the use of separate seats, stems and seals for water flow
Casing – a tubular structure intended to be watertight – it is installed in the drilled hole to maintain the well opening and prevent ground water from entering
Catch basin – large underground container with a grate on top for collection of storm water – it catches debris and prevent steams and lakes being contaminated
Cathode – a negatively charged electrode
Cation – a positively charged ion in an electrolyte solution, which is attracted to the cathode by a difference in electrical potential
Cavitation – the vacuum created when the discharge of the pump exceeds the replacement in the suction line
Chain wrench – an adjustable wrench, in which a chain is used for gripping
Chamfer – bevelled end
Check stop – shut-off valve used with tub/shower faucet that is activated by turning a slotted stem with a screwdriver – also known as a screwdriver stop or a service stop
Check valve – a type of back flow preventer installed in a pipe that allows water to flow in one direction
Circuit vent – plumbing drainage system vertical vent, which is run from the last two traps on a horizontal drain line to the main vent stack of a building drainage system
Cistern – rainwater storage tank, often underground
Clevis – a U-shaped piece of metal with holes in the ends, through which a pin is run to attached to pipes
Closed system – a system where the incoming cold water supply has a device that will not allow water to expand when heated
Conduit – tube that houses electrical wiring
Cowl – a short fitting used to join two pieces of pipe
Crocus cloth – finer than sandpaper grit on a cloth backing
Cross-connection – any connection that may allow wastewater to enter the supply system
Crown-vented trap – an air admittance valve attached to a drainpipe, protected by a valve, designed to equalise pressure in the drain line and to protect the trap seal
Crows foot – a PVC tee with twin outlets at right angles off the main
If you missed our earlier plumbing glossary instalments, you can read the A-words here and the B-words here.