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TERM
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EXPLANATION
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WC |
Water Closet |
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WH |
White finish on faucets. |
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Wall Thickness |
The thickness of the tubing wall. |
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Wash-Down Water Closet |
Water closet having a siphon trapway at the
front of the bowl, and integral flushing rim. |
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Waste Arm Drain |
An extension pipe, usually to extend a sink
drain into a wall. |
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Waste & Overflow Drain |
An assembly for a bathtub. The outlet at the
top removes the overflow water during tub filling and the drain at the
bottom removes wastewater when the tub is drained. |
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Waste Plug |
Drain stopper on a bathtub drain
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Waste Shoe |
Bathtub drain assembly. |
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Waste Stack |
See
Soil Stack. The vertical main pipe in a drainage system, extending
one or more stories. |
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Water Closet |
A toilet. |
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Water Hammer |
A loud banging noise caused by the hydraulic
shock of suddenly shutting off a water supply, where water moves against
the side of containing pipe or vessel. |
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Water Hammer Arrestor |
A device installed near a fixture to absorb
the hydraulic shock caused by a sudden shutoff of water. |
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Water Horse Power (WHP)
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The calculated horse power produced by the
pump using the formula WHP = head x gpm/3960. |
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Water Service Pipe |
The pipe from the water main or other sources
of potable water supply to the water-distributing system of the building
served. |
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Water Spot |
Water surface in the toilet bowl once the
flush is completed. |
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Water Table |
Level below the earth's surface at which the
ground becomes saturated with water. |
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Waterway Fitting |
A channel through which water can flow; connects
water heater to inlet and outlet lines. |
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Wave Washer |
A washer, common in drain linkages, which
provides pressure against a ball or other mechanism even when the opposing
nut is not fully tightened. |
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Weak Well |
Weak well application occurs when the pump
lowers the water level in the well faster than the well can replenish
itself. |
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Weir |
A long notch with a horizontal edge, as in
the top of a vertical plate or plank, through which water flows, used
in measuring the quantity of flowing water. |
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Well Casing |
A steel or plastic pipe inserted into a drilled
well to prevent dirt and debris from contaminating the water. |
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Wellpoint |
A pipe fitted with a driving point and a fine
mesh screen used to remove underground water. A complete set of equipment
for drying up ground including wellpoints, connecting pipes and pumps.
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Wet Vent |
Drain or waste pipe that also acts for one
or more fixtures on the same line. |
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Whirlpool Tub |
A bathtub with circulation jets in various
spots throughout the tub that provide therapeutic massaging action.
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Widespread |
A style of bathroom lavatory faucet having
separate spout and handles, usually 8" from center of handle to handle.
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Working Pressure |
Maximum pressure of the operating system permissible.
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Working Water |
Water used in a home for most general purposes
including bathing and laundering. |
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Wrought Copper Fittings
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Plumbing fittings used to connect copper tubes
made of mechanically worked and toughened copper as opposed to an as-cast
brittle copper. |
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Wye |
A Y-shaped fitting with three openings used
to create branch lines. Allows one pipe to be joined to another at a 45
degree angle. |
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