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A 16-ft x 40-ft dual media drinking water filter is to be cleaned using an air wash followed by a water wash. The air wash

A 16-ft x 40-ft dual media drinking water filter is to be cleaned using an air wash followed by a water wash. The air wash is at a rate of 5 scfm/ft². What is the recommended airflow rate (scfm) for the air wash?

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