Specification - F1100-C-K - Floor Drain with Dome Strainer for Membrane Floor Areas MIFAB series F1100-C-K-1 lacquered cast iron floor drain with anchor flange, cast iron membrane clamp ring with primary and secondary weepholes for waterproofing membrane, and "K" dome satin finished nickel bronze strainer. (For non membrane floors, use MIFAB F1100-K series).