The cover is dropped away when the head activates and lowers below the ceiling to spray the water.Īlthough interior designers do not design these sprinkler systems, it is important to recognize the location of the heads in a drawing and coordinate them with other ceiling-mounted items. However, recessed sprinkler heads that have a smooth cover flush with the ceiling are available at a higher cost. In most buildings, these sprinkler heads are visible, and they can be located on ceilings and walls, depending on the amount of coverage needed. In the case of a fire, heat sensor devices activate these heads to open and allow the directionally controlled flow of water to the fire's source. This system is fed from dedicated water mains that in turn connect through piping to the individual sprinkler heads. The fire-protection system, which is considered separate from the plumbing, is usually a sprinkler system utilizing its own separate water system. Domestic waterline sizes are also specified. Figure 15-10 The sanitary sewer system in this small apartment is drawn as heavy lines over the base floor plan, with sizes noted.
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