Which method is typically used to test for proper drainage flow?

The method used to test for proper drainage flow is typically the water flow test. This technique involves introducing water into the drainage system to observe how effectively it is drained away. During this test, the speed and completeness of drainage are monitored to ensure that the system is functioning according to specifications. This method allows for the assessment of any potential blockages, improper slopes, or inefficiencies in the drainage design.

In contrast, soil sampling focuses on the physical properties of the soil and does not directly assess the performance of the drainage system itself. Visual inspection can help identify obvious issues, but it does not provide quantitative data on the drainage flow performance. Similarly, temperature checks are unrelated to drainage flow and do not contribute relevant information regarding how effectively water is moving through the system. Thus, the water flow test is the most reliable and direct method for ensuring that a drainage system is functioning as intended.