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TERM
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EXPLANATION
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TBE |
Threaded Both Ends
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T & C |
Threaded and Coupled. Some cast
iron pipe is sold threaded with a coupling attached. |
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TDS |
Total Dissolved Solids. |
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TO |
Threads Only. |
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T & P Valve |
Temperature & Pressure relief
valve. A safety device used to expel excess pressure or heat from inside
a tank. |
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TPI |
Threads Per Inch
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T & S |
Tub and Shower |
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Tailpiece |
Section of pipe that runs between a fixture
outlet and the trap. |
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Tail Pipe |
The pipe added below the jet assembly, in
a weak well application. |
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Tank Fixture |
A reservoir for flush water. On a conventional
toilet, the ballcock, flush valve, and trip lever are installed in the
tank. A tank lid closes the top tank opening. |
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Tank Cross |
A double-tee-shaped fitting installed between
a shallow well pump and the bladder tank with integrated valve and gauge
fittings, and an outlet for a pressure-relief valve. |
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Tank-less Water Heater |
Instantaneous water heater. |
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Tannin (Tannic acid) |
A substance occurring naturally in well water.
It is produced by decaying vegetation, and causes the water to have a
yellow of light brown color and can provide a bitter taste. There is currently
no EPA regulatory level for tannin in water. |
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Tap Adapter |
Fitting with one plain end and one threaded
female end. |
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Tap Tee |
Cast iron tee with a threaded female side
inlet. |
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Tap Water |
Water provided by a water company by way of
the home's plumbing system. |
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Tapered Pipe |
Standard type of threads used on iron pipe
and pipe fittings. |
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Tee |
T-shaped fitting with three openings that
allow another pipe to be joined at a 90 degree angle, used to create branch
lines. |
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Teflon Tape |
A fluorocarbon polymer with non-sticking properties
used to wrap pipe threads to seal a joint. |
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Temperature Rise |
The number of degrees Fahrenheit that incoming
water must be raised to reach the desired water temperature.
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Tempered Glass |
Glass that has been annealed or strengthened
by a process of gradually healing and cooling. Once a piece of glass has
been tempered, it cannot be cut. If it breaks, it breaks into many small
pieces. By code, all shower doors must be made of tempered glass.
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Tempering Valve |
An in-line hot / cold mixing valve. |
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Test Plug |
A rubber plug that is used to seal off sections
of pipe to allow testing for leakage. |
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Test Tee |
A tee with a removable plug for permitting
access to a drainage line. |
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Therm |
Measurement of 100,000 BTU's.
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Thermal Efficiency |
Ability to transfer and absorb heat from fuel
sources into the water. |
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Thermal Expansion |
The effect of water expanding when heated. |
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Thermal Stratification |
See
Stacking. |
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Thermocouple |
Small electric generator. Electron flow between
the hot junction of 1200 degrees F and cold junction of 600 degrees F
creates millivoltage. |
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Thermopile |
Apparatus that consists of a number of thermocouples
combined so as to multiply the effect and is used for generating electrical
current. |
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Thermostat (Lower) |
Device that automatically maintains a predetermined
temperature in an appliance. |
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Thermostat (Upper) |
Device that automatically maintains a predetermined
temperature in an appliance, usually equipped with a safety shutoff.
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Thermostatic Valve |
Pressure-balancing shower mixing valve with
automatic temperature control. When temperature or pressure fluctuations
occur at the water inlets, a thermal actuator adjusts the hot and cold
ratio to maintain the original temperature setting. |
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Throat-Plate |
The underside portion of some faucet spouts
which also use a top shroud to cover an assembled faucet waterway. The
throat-plate is only visible when viewed from a very low angle.
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Threaded |
A helical or spiral ridge on a screw, nut,
or bolt. |
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Tile Rise (Buttress) |
The raised portion of a shower curb that is
on more than one level. |
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Total Dissolved Solids |
A measure of the total amount of dissolved
matter in water. |
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Total Head |
The difference between the head at the discharge
and suction flange of the pump ( syn Total Dynamic Head, pump head, system
head). |
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Touchless Faucet |
Commercially installed faucet or urinal valve
that function using infrared sensor system. |
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Total Discharge Head |
The total pressure or head the pump must develop.
It is the sum of the depth to pumping level, elevation, service pressure,
and friction loss. |
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Toxicity Test |
Test to determine the toxicity of a chemical
or an effluent using living organisms. It measures the degree of response
of an exposed test organism to a specified chemical or effluent. |
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Transite Pipe |
Pipe manufactured from asbestos and concrete,
commonly found in water mains. Transom Panel a panel usually located above
the door of an enclosure. It can be used to keep steam inside of a steam-shower
unit. Some open to vent steam. |
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Trap |
Curved section of drain line that prevents
sewer odors from escaping into the atmosphere. All fixtures that have
drains must have a "P" trap installed. A toilet is the only plumbing fixture
with an "S" trap. |
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Trap Arm |
The waste arm portion of a drainage trap.
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Trap Dip |
The U-bend portion of a drainage trap.
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Trap Drain |
A flex adapter to connect 1 ĵ" to 1 ½" drain
pipe Trap Primer A small feeder line connecting the cold water line directly
to the drainage trap, which releases a small amount of water to the trap
should it run dry to maintain the water seal. |
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Trap Seal |
Height of water in a toilet bowl "at rest.".
It provides the water seal which prevents sewer gases from entering the
home. It is measured from the top of the dam down to the inlet of the
trapway. Also referred to as deep seal. |
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Trap Weir |
See
Crown Weir. An interior projection in the outlet side of a trap to
aid in maintaining a water seal. |
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Trapway |
Channel in a toilet that connects the bowl
to the waste outlet. It is where the siphonic action takes place. The
trapway is measured in terms of the largest diameter ball which can pass
through it. Also called the passageway. Trim Any non-vitreous china toilet
components, except the seat. Includes such items as ballcock, bolt caps,
trip lever. |
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Trenchless |
A system of installing or replacing underground
infrastructure by pulling the lines through an existing pipe or a pilot
hole, rather than laying pipe into long, pre-dug trenhches. More on
Trenchless Services. |
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Trip Lever |
Flush handle and actuating arm on a toilet
tank. Also the lever that opens and closes the drain on the bathtub waste
and overflow. Tube Talon Plastic hanger for mounting copper pipe. |
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Tube Valve |
A valve which is opened or closed by mechanically
moving a tube upstream or downstream by an actuating screw Tube Washer
Replacement washer for one end of a closet tube. |
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Tuberculation |
The process in which blister-like growths
of metal oxides develop in pipes as a result of the corrosion of the pipe
metal. Iron oxide tubercles often develop over pits in iron or steel pipe,
and can seriously restrict the flow of water. |
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Turbulent Flow |
Fluid flow in which the velocity at a given
point varies erratically in magnitude and direction. Turbidity Water cloudiness
caused by suspended particles. |
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Two-Piece Toilet |
Toilet with a separate tank and bowl. Also
referred to as a close-coupled toilet. Type "L" Tube An industry standard
for copper tubing defined by the tube wall thickness and identified by
a "blue" strip. Type "L" copper tube wall is approximately 50% greater
thickness than Type "M." |
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Type "M" Tube |
An industry standard for copper tubing defined
by the tube wall thickness and identified by a "red" stripe Tyseal Gasket
Gasket for joining SV cast iron pipe into a hub. |
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