At the start of flushing, how should you backfill the irrigation lines?

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Prepare for the CR-21 Landscapes and Irrigation Test. Utilize flashcards and multiple-choice questions featuring hints and explanations. Get exam-ready!

Multiple Choice

At the start of flushing, how should you backfill the irrigation lines?

Explanation:
During the start of flushing, backfill about half to two-thirds of the trench. This provides enough soil to hold and align the pipe in place while leaving space for air and water to move and push out sediment as you begin the purge. If you backfill completely right away, air pockets and fines can get trapped and flushing becomes less effective. If you backfill only a quarter of the trench or leave it open, the pipe may shift or float and debris can more easily enter the line. Finish the backfill after flushing is underway to keep the system stable and clean.

During the start of flushing, backfill about half to two-thirds of the trench. This provides enough soil to hold and align the pipe in place while leaving space for air and water to move and push out sediment as you begin the purge. If you backfill completely right away, air pockets and fines can get trapped and flushing becomes less effective. If you backfill only a quarter of the trench or leave it open, the pipe may shift or float and debris can more easily enter the line. Finish the backfill after flushing is underway to keep the system stable and clean.

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