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The most widely accepted flow rate for rapid rate sand filters in a public pool is __________ per square foot.

  1. 1 gpm

  2. 2 gpm

  3. 3 gpm

  4. 4 gpm

The correct answer is: 1 gpm

The most widely accepted flow rate for rapid rate sand filters in a public pool is 1 gallon per minute per square foot. This flow rate is considered to be the most efficient and effective in filtering pool water. Option B, 2 gpm, may be a bit too high and could potentially result in clogging or loss of pressure in the filter. Option C, 3 gpm, and D, 4 gpm, are significantly higher and could lead to inadequate filtration and potential safety hazards. It is important to carefully consider and adhere to the recommended flow rate for a pool's filtration system for optimal performance and maintenance.