Specification - F1100-C-ER - Extended RimFloor Drain for Membrane Floor Areas MIFAB series F1100-C-ER-( )-1 lacquered cast iron floor drain with anchor flange, cast iron membrane clamp ring with primary and secondary weepholes for waterproofing membrane, and extended rim (specify diameter), satin finished nickel bronze strainer. (For non membrane floors,use MIFAB F1100-ER series).