Specification - MC-21 - Compact Rear Outlet Water Closet Carrier without Fitting MIFAB Series MC-21 floor mounted single, horizontal, adjustable water closet carrier without fitting, 4" (102) back outlet waste connection (specify no hub or threaded), lacquered cast iron adjustable faceplate, universal floor mounted cast iron foot supports, adjustable 8" tapered thread ABS nipple with integral test cap, neoprene bowl gasket, hardware, threaded rod protectors, polished chrome plated finishing cap nuts and read anchor tie down support.