What is the minimum feet of head required to test a rough drainage and venting system?

The minimum feet of head required to test a rough drainage and venting system is specified to ensure that the system can handle water flow with adequate pressure and maintain integrity. A head of 10 feet is standard because it simulates actual flow conditions and evaluates the effectiveness of vents, traps, and overall drainage performance under typical operating conditions. This requirement allows for a thorough assessment of leaks, blockages, and potential systemic failures that may not appear under lower testing pressures. A lower head might not provide a comprehensive check of the system’s ability to function effectively under expected real-world conditions.