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| Greywater
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Waste water from a household source other than a toilet. This water can be used for landscape irrigation depending upon the source of the greywater. |
| Grid
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A pattern of lines laid out at right angles to each other. Alternately, a series of intersecting lines dividing a map or chart into equal sections. Also, the intersecting bars, wires, or supports as in a grating or supports in a dropped ceiling. |
| Grid system
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Division of a large area into grid or squares to it more manageable. |
| Grillage
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Grid of steel rebar in a concrete foundation to spread the load over a wider area. |
| Grille
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Coverings for the ducts where they open to the conditioned space. |
| Grinder
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Abrasive wheeled tool that is used to sharpen tools or to grind off material. |
| Grinder stand
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Grinder stands are usually constructed of cast iron and provide durability and stability when using a grinder. |
| Grinding handbook
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The grinding handbook comes with most bench grinders. It is a manual outlining and describing various grinding techniques. |
| Grinding wheel
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An abrasive wheel that is used to sharpen tools or to grind off material. |
| Grip fitting
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A compression-type fitting used on PB pipe. |
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