Planning & EstimatingQuestion 271 of 360
On plumbing plans, piping that runs below the floor slab or underground is most commonly drawn using which line type?
a.A double solid line
b.A line with a row of circles
c.A heavy solid line
d.A dashed (broken) line
Explanation
Concealed or below-grade piping is conventionally shown as a dashed line, while exposed or above-slab piping is a solid line. Distinguishing solid from dashed lines tells the installer whether a run is under the slab or overhead. Always confirm against the drawing's line-type legend.
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