MI-600-50 Cast Iron Trap Seal Primer Home » Products » MI-600-50 Cast Iron Trap Seal Primer The MIFAB® MI-600-50 Series lacquered cast iron trap seal primer adaptor with primer tapping boss with ½” (13) I.P.S. tapping for installation between floor drain and deep seal trap. Specification Sheet Catalog Catalog List Pricing Current Catalog: MPB-2022 Return to Products