Specification - C1100-C - Floor Cleanout with Adjustable Cover and Plug and Membrane Clamp. MIFAB series C1100-C (specify top assembly design) adjustable floor cleanout with lacquered cast iron body and anchor flange, cast iron membrane clamp for waterproofing membrane, secondary "O" ring Test Seal, 4in diameter cleanout opening and round scoriated combined cover and plug top assembly (specify material type) with stainless steel vandal proof allen key screws and primary gasket seal.