Specification - F1100-FT - Floor Drain with Recessed Flange for Non Membrane Floor Areas MIFAB series F1100-FT6-1 - acquered cast iron floor drain with anchor flange, weepholes, and standard reinforced 6" (150) diameter satin finished nickel bronze strainer with 1/8" (3) recessed tile flange. (For membrane floors, use MIFAB F1100-C-FT6 series).