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| Potting on
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The repotting of a plant into a proper-sized larger pot which will allow continued root development. |
| Potting soil
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A soil mixture designed for use in container gardens and potted plants. Potting mixes should be loose, light, and sterile. |
| Pound
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A unit of weight equal to 16 ounces (7,000 grains) avoirdupois or 12 ounces (5,760 grains) troy. Abbreviation is lbs. |
| Pound of steam
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One pound of water in vapor phase; is NOT steam pressure, which is expressed as pounds per square inch (psi). |
| Pounds per square inch (psi)
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Measure of the load pressure of one commodity on another. Atmospheric pressure at sea level is 14.696 psi with Fluid pressure (liquid & gas) being measured in terms of pounds per square inch absolute or pounds per square inch gauge. |
| Pounds per square inch absolute (psia)
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Measurement of pressure as measured on a pressure gauge with the addition of atmospheric pressure, which is 14.696 at sea level, therefore, a pressure of 30 pounds per square inch gauge (psig) is equal to 44.696 pounds per square inch absolute (psia). |
| Pounds per square inch gauge (psig)
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Fluid pressure (liquid and gas) as measured on a pressure gauge without the inclusion of atmospheric pressure. |
| Pour coat
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The top coating of bitumen on a built-up roof. |
| Pourable sealer
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A type of sealant that is initially in liquid form commonly used in conjunction with pitch pans to form a water-tight barrier around penetrations that are difficult to flash. |
| Poured concrete wall
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Concrete wall that is poured into forms and set-up in the place where it will remain. |
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