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Outside leaders and downspouts shall be connected to the house drain which shall be cast iron pipe extending vertically at least 18 inches above the grade level with tight connection between leader and soil pipe.

Related Code Sections

P-1005.2 Storm Water Drainage Piping, Outside Leaders and Downspouts
Outside leaders and downspouts shall be connected to the house drain which shall be cast iron pipe extending vertically at least 18 inches above ...
P2912.5 Water Supply and Distribution, Roof Gutters and Downspouts
, leaders and rainwater collection piping shall slope continuously toward collection inlets and shall be free of leaks. Gutters and downspouts shall have ...
1303.5 Nonpotable Water Systems, Roof Gutters and Downspouts
, leaders and rainwater collection piping shall slope continuously toward collection inlets. Gutters and downspouts shall have a slope of not less than ...