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

Where possible, how should a water main be installed at a crossing with a sanitary sewer?

So the top of the sewer is a minimum of 18 inches below the bottom of the water main So the water main is always under the sewer with no vertical gap So the two pipes touch to share a common bedding So the sewer is 6 inches above the water main

Correct Answer:

So the top of the sewer is a minimum of 18 inches below the bottom of the water main

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