Specification - MC-10D-27 - Double Horizontal Adjustable Water Closet Carrier with Auxiliary 2" Non Hub Inlet for Back to Back Installations of Syphon Jet Bowls. MIFAB Series MC-10D-27 double horizontal adjustable water closet carrier with lacquered cast iron fitting, 4" (100) no hub waste and 2" (50) no hub vent connection, lacquered cast iron face plates and ductile iron foot supports, adjustable ABS nipple with integral test cap and neoprene bowl gasket, plated hardware and polished cap nuts.