AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

When is a drop manhole (drop connection) typically required?

Whenever two sewers of different diameters meet When an influent sewer enters substantially higher than the manhole invert channel Only on the last manhole before the treatment plant Whenever the manhole is deeper than 4 feet

Correct Answer:

When an influent sewer enters substantially higher than the manhole invert channel

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