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Civil Engineering PE

Category - Water Treatment

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Which of the following is not recommended when testing polyvinyl chloride (PVC) pressure pipe?

Locate testing connection at the lowest point of the line
Properly backfill pipe trench
Use air pressure for testing
Use hydrostatic pressure for testing

Explanation

Answer: C - The use of air pressure is not recommended for testing PVC pressure pipes. The manufacturers of PVC have indicated that air pressure testing of PVC pipes is extremely dangerous because of its explosion potential. When PVC piping explodes, plastic shrapnel is sent in all directions and can cause serious injuries or death. Consequently, hydrostatic pressure testing is the method employed by municipal water agencies for testing PVC pressure pipe.

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