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| Pop-up drain
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Type of drain assembly for lavatory and bath. When a lavatory lift rod or bath overflow plate lever is lifted, the pop-up drain closes so the lavatory or tub retains water. |
| Popcorn
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(1) Decorative acoustic ceiling, spray on texture, consisting of vermiculite in a bonding agent. (2) Asphalt paving mix consisting primarily of 3Ú4 inch aggregate. |
| Popcorn surface texture
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A coarse surface texture of SPF considered unacceptable for coatings. |
| Poppet
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Valve, controlling flow, which has a disc at a right angle to the stem, with the valve opening and closing when it is moved up and down on the end of the stem and is often used in internal combustion engines. |
| Population density
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Population per square mile of a given area. |
| Porcelain
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White ceramic ware that consists of quartz, kaolin, and feldspar. It is fired at high temperature on steel or cast iron to make the surface of some bathtubs, kitchen sinks, and bathroom lavatories. |
| Porcelain enamel
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Vitreous enamel. Often refers to pressed steel products with a porcelain glaze. |
| Porcelain on steel (pos)
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A finish commonly used on sinks and tubs. |
| Porcelain tile
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A ceramic mosaic tile or a paver tile that is generally made by the dust-pressed method from a composition which results in a tile that is dense, impervious, fine grained and smooth, with a sharply formed face. |
| Porch
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An open or enclosed room on the outside of a building, which projects outward from an exterior wall. |
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