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In a gravel system, the correct depth of aggregate below the perforated pipe should be:
4 inches
6 inches
8 inches
12 inches
The correct answer is: 6 inches
The correct depth of aggregate below the perforated pipe in a gravel system is typically 6 inches. This depth ensures that there is adequate drainage and proper flow of water through the system, allowing the perforations to function effectively in filtering and conveying water away from the pipe. The 6-inch measurement is a commonly accepted industry standard, supporting optimal functionality and preventing potential clogging that could impede drainage performance. Additionally, having this depth helps protect the pipe from settling or moving, maintaining the integrity of the entire drainage system. Proper installation at this depth also promotes the longevity of the system and minimizes maintenance needs over time.