Products / MIFAB R1100 Standard Sump Roof Drain

The R1100 series is MIFAB's standard sump roof drain: a lacquered cast iron body with an anchor flange, a cast iron waterproofing membrane clamp ring with an integral gravel stop, and a self-locking polyethylene dome strainer with 43 sq. in. of free area, per the product page's specification text. It is listed in MIFAB's 2025 specification drainage catalog (MPB-2025-04-USA).