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TERM
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EXPLANATION
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Ga. |
Abbreviation for gauge, the wall thickness
of tubing |
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GAMA |
Gas Appliance Manufacturers
Association |
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GFCI |
Ground Fault Circuit
Interrupter. A device to cut off the flow of electricity if a short
circuit is detected. |
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GPF |
Gallons Per Flush used
in toilets. Current law requires maximum of 1.6 gpf. Older styles were
usually 3.5 gpf. |
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GPG |
Grains Per Gallon. A
measurement of the amount of dissolved material in water. One grain per
gallon equals 17.1 ppm |
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GPH |
Gallons Per Hour. A measure
of flow rates. |
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GPM |
Gallons Per Minute. The
rate of flow by which faucets and showerheads are measured and regulated.
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Galvanic Action |
The phenomenon of corrosion of an anode (positive
terminal - like on a battery). 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 (negative) of this cell will corrode and dissolve while
the cathode (positive) will be protected from corrosion. |
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Galvanic Series |
A list of metals with those on the top of
the list being attacked by those lower down in the list. The father apart
on the list, the faster the attack. |
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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. |
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Galvanometer |
Laboratory instrument that detects and
measures small electric current. |
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Gas Cock |
Plug valve installed the main gas line and
an appliance. |
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Gas Control Device |
Is used to regulate gas pressure on a water
heater. |
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Gasket |
Flat device usually made of fiber or rubber
used to provide a watertight seal between metal joints. |
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Gate |
A device that controls the flow in a conduit,
pipe, or tunnel. |
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Gate Diverter |
The pop-up lever on a tub faucet that activates
the diverter valve |
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Gauge (gage) |
Device for registering water level, discharge,
velocity, pressure, etc. A number that defines the thickness of the sheet
used to make steel pipe. The larger the number, the thinner the pipe wall. |
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Gel / Grease Cap |
Waterproof wire connector. |
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Gland |
In a pump, the part that holds one half of
the mechanical seal and attaches to the stuffing box. |
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Glaze |
Glossy water-resistant, colored finish on
vitreous china fixtures. |
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Globe Valve |
A gate valve with a curved chamber. |
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Grab Bar |
Safety bar installed in a bathtub or shower
for use when bathing. |
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Gravity Operated Toilet
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A toilet that relies on the natural downward
pressure of water in a toilet tank to flush the toilet effectively.
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Grains Per Gallon (gpg)
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A common basis for reporting water analyses
in the United States and Canada; one grain per U.S. gallon equals 17.12
milligrams per liter (mg/1) or parts per million (ppm). One grain per
British (Imperial) gallon equals 14.3 milligrams per liter or parts per
million. |
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Gray Water |
Waste water from sinks, showers, and bathtubs,
but not toilets. |
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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. |
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Greensand |
A natural mineral, primarily composed of complex
silicates, which possesses ion exchange properties. |
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Grip Fitting |
A compression-type fitting used on PB pipe. |
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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. |
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Ground Joint |
A joint which consists of pressing two smooth
mating surfaces together without a gasket or supplemental sealant. |
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Ground Joint Union |
Pipe union that has a brass grounding section
between the two halves. |
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Ground Water |
Naturally occurring water rising from the
water table of the surrounding land. |
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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. |
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Guide Arm |
Valve which controls water flow into the toilet
tank. |
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