Planning & EstimatingQuestion 313 of 360
When planning the drainage layout, why must roof and storm drainage generally be kept separate from the sanitary drainage system?
a.Because storm water is warmer
b.Because the code requires storm drainage to be an independent system, not discharged into the sanitary sewer, unless specifically approved by the authority
c.Because storm pipe is always larger than 12 inches
d.Because sanitary pipe cannot be plastic
Explanation
CPC 1101.0 and related sections require storm drainage to be conveyed by an independent system rather than combined with sanitary drainage, except where a combined system is specifically approved. Mixing them can overload the sanitary sewer and treatment system during rain. Planning separate systems on the drawings keeps the layout compliant.
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