However, when specified on the lists of materialsor plumbing takeoff, valves are called out by size,type of material, and working pressure; forexample, 2-in. gate valve, PVC, 175-lb workingpressure.Fixture SymbolsThe symbols shown in figure 8-31 are forgeneral appurtenances, such as drains and sumps,and shower stalls, are shown on the plans bypictorial or block symbols. The extent to whichthe symbols are used depends on the nature ofthe drawing. In many cases, the fixtures will bespecified on a bill of materials or other scheduleskeyed to the plumbing plan. When the fixturesare described on the schedule, the EA can usesymbols that closely resemble the actual fixturesor obtain mechanical symbol templates that arebut other fixtures, such as sinks, water closets,available commercially.Figure 8-31.-Symbols for plumbing fixtures.8-24
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