Specification - MC-27 - 90 degree Double Stack Fitting for Floor Mounted Back Outlet Water Closets MIFAB Series MC-27 water closet carrier with lacquered cast iron 90 degree double no hub stack fitting with 4" (102) no hub waste and anti-crossover baffles for floor mounted back outlet water closets. Complete with adjustable 8" ABS nipples with integral test caps, neoprene bowl gaskets, hardware, threaded rod protectors, polished chrome plated finishing cap nuts and side anchor tie down supports.