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| Water spot
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Spot remaining on a surface after water has dissolved leaving minerals behind. |
| Water spotting
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A paint appearance defect caused by water droplets. |
| Water stain
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Water-based stain used on wood. |
| Water stop
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Material placed over a joint and used to prevent water entry. |
| Water supply system
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The collection of pipes and valves that deliver potable (drinkable) water to a building. |
| Water supply tube
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Standard tubing comes in chrome covered copper, rough copper with no chrome, plastic and corrugated copper and are connected to the sinks, toilets, and other fixtures by compression fittings. |
| Water table
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Horizontal member extending from the surface of an exterior wall to throw rainwater away from the wall; also, the level of subsurface water. |
| Water trough
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The area in a valley where water runs. Usually referred to with open valley configurations. |
| Water turbine
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A turbine that uses water pressure to rotate its blades; the primary types are the Pelton wheel, for high heads (pressure); the Francis turbine, for low to medium heads; and the Kaplan for a wide range of heads. Primarily used to power an electric generator. |
| Water vapor
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Water vapor can be treated as a gas. At a particular temperature air for example can only hold so much water vapor. The higher the temperature the more water vapor it can hold. When saturated the relative humidity would be 100 % RH, so relative humidity describes how close to saturation the air is. It is important to remember that in a process with a high relative humidity a small drop in temperature will cause the humidity to rise and the environment to saturate. Rapid temperature changes in a an environmental chamber for example could also cause condensation. |
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