During a fixture flood test, what type of test should be performed for 15 minutes when an RV is equipped with a liquid waste holding system?

In the context of a fixture flood test for recreational vehicles (RVs), using static water for a duration of 15 minutes is the correct approach when the RV is equipped with a liquid waste holding system. A static water test assesses the ability of the fixture, in this case, the wastewater system, to contain water without leaks.

During this test, water is allowed to fill the system without movement, mimicking conditions that could lead to stagnation. This is essential because it helps to identify any potential leaks in the holding tanks or associated plumbing under actual operating conditions. By maintaining a static condition, the test can effectively reveal weaknesses or failure points in the sealing or structural integrity of the liquid waste holding system.

In contrast, dynamic water tests involve moving water and are more suitable for evaluating the flow characteristics of plumbing systems rather than leak detection in static conditions. Pressure tests focus on ensuring the system can withstand certain pressures but may not adequately simulate the conditions within a holding system over time. Flow tests measure the rate and efficiency of water movement, which is not the primary concern when checking for leaks in a static scenario. Therefore, static water tests are the best method for this specific application.