Specification - F1100-C-EG - Oval Funnel Floor Drain for Membrane Floor Areas MIFAB series F1100-C-EG-1 lacquered cast iron floor drain with anchor flange, cast iron membrane clamp ring with primary and secondary weepholes for waterproofing membrane, and standard 4" x 9" (100 x 225) oval satin finished nickel bronze open throat funnel. (For non membrane floors, use MIFAB F1100-EG series).