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| WH |
|
White finish |
| Wall Thickness |
|
The thickness of the tubing wall. |
| Wash-down Water Closet |
|
Water closet having a siphon trapway at the front of the bowl, and integral flushing rim. |
| Waste Arm Drain |
|
An extension pipe, usually to extend a sink drain into a wall. |
| 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. |
| Waste Plug |
|
Drain stopper on a bathtub drain |
| Waste Shoe |
|
Bathtub drain assembly |
| Waste Stack |
|
See Soil Stack. The vertical main pipe in a drainage system, extending one or more stories. |
| Waste Closet / WC |
|
A toilet |
| 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. |
| Water Hammer Arrestor |
|
A device installed near a fixture to absorb the hydraulic shock caused by a sudden shutoff of water. |
| Water Hose Power (WHP) |
|
The calculated horse power produced by the pump using the formula WHP = head x gpm/3960 |
| 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. |
| Water Spot |
|
Water surface in the toilet bowl once the flush is completed. |
| Water Table |
|
Level below the earth's surface at which the ground becomes saturated with water. |
| Waterway Fitting |
|
A channel through which water can flow; connects water heater to inlet and outlet lines. |
| Watt |
|
A unit of electrical energy or power. One ampere x one volt equals one watt. |
| Watt Density |
|
Amount of watts concentrated per square inch of element blade surface area. |
| 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 |
| Weak Well |
|
Weak well application occurs when the pump lowers the water level in the well faster than the well can replenish itself. |
| 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. |
| Well Casing |
|
A steel or plastic pipe inserted into a drilled well to prevent dirt and debris from contaminating the water |
| 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. |
| Wet Vent |
|
Drain or waste pipe that also acts for one or more fixtures on the same line. |
| Whirlpool Tub |
|
A bathtub with circulation jets in various spots throughout the tub that provide therapeutic massaging action. |
| Widespread |
|
A style of bathroom lavatory faucet having separate spout and handles, usually 8" from center of handle to handle. |
| Working Pressure |
|
Maximum pressure of the operating system permissible. |
| Working Water |
|
Water used in a home for most general purposes including bathing and laundering |
| Wrought Copper Fittings |
|
Plumbing fittings used to connect copper tubes made of mechanically worked and toughened copper as opposed to an as-cast brittle copper. |
| 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. |
