Mich. Admin. Code R. 408.30533a - [Effective 8/29/2025] Rough plumbing
Rule 533a. Section P2503.5.1 of the code is amended and P2503.8, P2503.8.1 and P2503.8.2 are added 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 millimeter, 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
kilopascals, or 10 inches, 254 millimeters, of mercury column, 34 kilopascals.
This pressure shall be held without introduction of additional air for a period
of 15 minutes.
P2503.8
Inspection and testing of backflow prevention devices. Inspection and testing
of backflow prevention devices shall comply with sections P2503.8.1 and
P2503.8.2.
P2503.8.1 Inspections. Inspections
shall be made of backflow prevention assemblies to determine whether they are
operable.
P2503.8.2 Testing.
Reduced pressure principle, double check, double check detector, and pressure
vacuum breaker backflow preventer assemblies shall be tested at the time of
installation and immediately after repairs or relocation.
Notes
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