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Plumbing brings in fresh water and removes waste water. The fresh water system is called the supply system. It brings water from the main source (city water or private well) and distributes it to sinks, toilets, tubs, and other plumbing fixtures. Actually, the supply system includes two sets of pipes, one for cold water and one for hot water. The hot water system heats up a portion of the supply water in one or more tanks inside your home. It then distributes it to sinks, tubs, and showers that require both hot and cold water. Remodeling Safety Remodeling contractors recommend a water-pressure back-up sump pump for wetter installations. It works off the water line pressure instead of electricity (which may go out in a storm) or batteries (than can age and die). Ask your plumbing supplier about these units and whether your basement requires one. Where does it all go? Waste water from sinks, toilets, and other fixtures are removed from your home by the drain-waste system. Because gases can build up in waste, this system also includes a venting system. Together, the waste system is called a drain-waste-vent or DWV system. Remodeling Words DWV is an acronym referring to all or part of the plumbing system that carries waste water from fixtures to the sewer and gases to the roof.
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