Section R. 408.30785 - Requirements for discharge pipingRule 785. Section 504.6 of the code is amended to read as follows:
504.6. Requirements for discharge piping. (1) Relief valves shall not discharge so as to be a hazard, a potential cause of damage, or a nuisance. A relief valve discharge pipe shall be provided for each individual relief valve and shall meet all of the following: (a) Shall terminate atmospherically not more than 4 inches (1220 mm) from the floor with an unthreaded end.(b) Shall not be interconnected.(c) Valves shall not be connected in the relief valve discharge pipe.(d) Shall be rigid pipe approved for water distribution, with a minimum temperature rating of 210 degrees Fahrenheit.(e) Shall have the same nominal inside diameter as the relief valve outlet and shall drain by gravity flow.(f) Shall discharge to the floor, to the pan serving the water heater or storage tank, or to a waste receptor.(2) The outlet of a pressure, temperature or other relief valve shall not be directly connected to the drainage system.Mich. Admin. Code R. 408.30785
1979 AC; 1982 AACS; 1989 AACS; 1998-2000 AACS; 2001 AACS; 2007 AACS; 2010 AACS