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Plumbing Terminology
Extensive Online Plumbing Dictionary

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Ga.:
Abbreviation for gauge.


Galvanic Action:
The phenomenon of corrosion of an anode. When two dissimilar metals are immersed in an electrolyte, an electrical potential will exist between them. If the two are in an electrical contact, a current will flow. The metal that becomes the anode of this cell will corrode and dissolve while the cathode will be protected from corrosion.


Galvanic Series:
A list of metals with those on top of the list being attacked by those lower down in the list. The farther apart on the list, the faster the attack.


Galvanizing:
The process of applying a coating of zinc to the finished product to provide corrosion protection. The coating can be applied by hot dipping or electrolytic deposition.


Galvanometer:
Laboratory instrument that detects and measures small electrical current.


GAMA:
Gas Appliance Manufacturers Association.


Gas Cock:
Plug valve installed in the main gas line and an appliance.


Gas Control:
Device used to regulate gas pressure on a water heater.


Gasket:
Flat device usually made of fiber or rubber used to provide a watertight seal between metal joints.


Gate:
A device that controls the flow in a conduit, pipe, or tunnel.


Gate Diverter:
The pop-up lever on a tub faucet that activates the diverter valve.


Gauge:
Refers to thickness of stainless steel and is commonly used in reference to quality grades on certain types of lavatories and sinks. 10 and 20-gauge stainless steel sinks go through a number of polishing and buffing operations to ensure a beautiful finish.


Gel/Grease Cap:
Waterproof wire connector.


GFCI:
Ground Fault Circuit Interrupter. A device to cut off the flow of electricity if a short circuit is detected.


Giardiasis:
A disease that results from an infection by the protozoan parasite Giardia, cause by drinking water that is either not filtered or not chlorinated.


Gland:
In a pump, the part that holds one half of the mechanical seal and attaches to the stuffing box.


Glaze:
Glossy water-resistant, colored finish on vitreous china fixtures.


Globe Valve:
A gate valve with a curved chamber.


Gooseneck:
Spout style characterized by a high arching spout.


GPF:
Gallons Per Flush - The rate of water flow by which toilets and flush valves are measured and regulated. Current law requires maximum of 1.6 GPF. Older styles were usually 3.5 GPF.


GPG:
Grains Per Gallon - A measurement of the amount of dissolved material in water. One grain per gallon = 17.1 ppm.


GPH:
Gallon Per Hour.


GPM:
Gallons Per Minute - The rate of water flow by which faucets and showerheads are measured and regulated.


Gr:
Grain - A unit of weight equal to 1/7000th of a pound, or 0.0684 gram.


Grab Bar:
Safety bar installed in a bathtub or shower for use when bathing.


Grain:
A unit of weight equal to 1/7000th of a pound, or 0.0684 gram.


Grain Per Gallon (GPG):
A common basis for reporting water analyses in the US and Canada; one grain per U.S. gallon = 17.12 milligrams per liter or part per million (ppm). One grain per British gallon = 14.3 milligrams per liter or parts per million.


Granular Carbon:
Granular carbon is activated charcoal in small granular form. Filter elements are made by packing the granule into a housing.


Gravity Operated Toilet:
A toilet which relies on the natural downward pressure of water in a toilet tank to flush the toilet effectively.


Gray Water:
Waste water form sinks, showers, and bathtubs, but not toilets.


Grease Trap:
A device that captures grease entering a system before it reaches the sewer lines. Usually used in commercial applications such as restaurants or cafeterias.


Greensand:
A natural mineral, primarily composed of complex silicates, which possesses ion exchange properties.


Grip Fitting:
A compression-type fitting used on PB pipe.


Grooved Fitting:
A gasketed mechanical pipe fitting made of ductile iron that is clamped onto a groove in a pipe rather than screwed onto threads. It is mostly used in commercial applications on pipes larger than 1-1/2" in diameter.


Ground Joint:
A joint which consists of pressing two smooth mating surfaces together without a gasket or supplemental sealant.


Ground Joint Union:
Pipe union that has a brass grounding section between the two halves.


Ground Water:
Naturally occurring water rising from the water table of the surrounding land.


Grounding:
Connecting a piece of electrical equipment to a "ground wire" which is connected to the electrical system ground at the circuit breaker box. This helps to ensure that the circuit breaker will trip and cut off power in the event of a short circuit or damage to insulation.


Guide Arm:
Valve which controls water flow into the toilet tank.


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