Mich. Admin. Code R. 408.30785 - Requirements for discharge piping
Rule 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.
Notes
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