Planning & EstimatingQuestion 302 of 360
When laying out vent piping, the CPC requires vents to be graded and connected so they do what?
a.Trap water at every low point
b.Run perfectly level with no slope
c.Drain back by gravity to a soil or waste pipe so condensate cannot collect
d.Terminate below the flood-level rim of a fixture
Explanation
CPC 906.0 requires vent pipes to be graded and connected to drain back by gravity to a soil or waste pipe, preventing condensate or rainwater from collecting and blocking the vent. A vent that sags and holds water can lose its function. Planning the vent slope and connection points keeps the venting system self-draining.
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