Products / MIFAB R1150 Combined Roof Drain and Secondary Overflow System

The R1150 series is MIFAB's combined roof drain and secondary overflow system, set in one cast iron sump receiver. Per the product page it has two lacquered cast iron drain bodies with anchor flanges, cast iron waterproofing membrane clamp rings with integral gravel stops, one 4 in. diameter adjustable ABS overflow standpipe, and two self-locking cast iron dome strainers with 43 sq. in. of free area each. It is listed in MIFAB's 2025 specification drainage catalog (MPB-2025-04-USA).