Should filter box depth accommodate underdrains, gravel, sand, and a water depth of 10 to 12 feet?

The statement is false. In typical filter box design, the depth does not need to accommodate a water depth of 10 to 12 feet. This depth is generally excessive for structures that utilize filter boxes, as they typically function with much shallower water depths. Filter boxes are designed to support the filtration process effectively while maintaining reasonable water levels that facilitate optimal performance without the risk of structural or operational issues.

Moreover, the composition within filter boxes must provide adequate space for layers such as underdrains, gravel, and sand, but this layering is incorporated within a much shallower overall depth than the stated 10 to 12 feet. Proper engineering design ensures that the filter media and drainage systems function correctly without requiring excessive water depths that could lead to complications such as increased pressure and potential failure of the filtration system.