NITC Journey Level Plumber Practice Questions - NITC Journey Level Plumber Certification Examination Exam

Per UPC Chapter 3, how must trenches be backfilled to protect plumbing piping?

With any available native soil compacted in 24-inch lifts With clean fill, free of rocks or debris, placed in lifts and compacted to prevent damage With concrete slurry only With pea gravel covering the full trench depth

Correct Answer:

With clean fill, free of rocks or debris, placed in lifts and compacted to prevent damage

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