Question

which pipe should be bigger those used for sewage disposal or those used for rainwater disposal ? why?

Answer 1

Which pipes should be bigger those used for sewage disposal or those used for stormwater disposal? Why?
Storm water pipes should always be bigger and wider than sewage disposal pipes. During floods the heavy water runoff is called storm water therefore the flow of storm water is much heavier than sewage water flow.

Missing: rainwater ‎| ‎Must include: ‎rainwater