Section R. 408.30533a - Rough plumbingRule 533a.
Section P2503.5.1 of the code is amended to read as follows:
P2503.5.1. Rough plumbing. DWV systems shall be tested on completion of the rough piping installation by water or air with no evidence of leakage. Either test shall be applied to the drainage system in its entirety or in sections after rough piping has been installed, as follows: 1. Water test. Each section shall be filled with water to a point not less than 10 feet (3 048 mm) above the highest fitting connection in that section, or to the highest point in the completed system. Water shall be held in the section under test for a period of 15 minutes. The system shall prove leak free by visual inspection.2. Air test. The portion under test shall be maintained at a gauge pressure of 5 pounds per square inch (psi) (34 kPa) or 10 inches (254 mm) of mercury column (34 kPa). This pressure shall be held without introduction of additional air for a period of 15 minutes.Mich. Admin. Code R. 408.30533a