MIFAB® Series R1230 combined medium sump roof drain and secondary overflow system, consisting of a galvanized sump receiver; two lacquered cast iron medium sump roof drain bodies with anchor flanges, cast iron waterproofing membrane clamp rings with integral gravel stops, one 4” (102) diameter adjustable ABS overflow standpipe and two self-locking cast iron dome strainers with a free area of 71.50 square inches each.

