"DN 2"" SS" "DN 3"" SS" "DN 4"" SS" RN ¾ x 1 RN ¾ NPT x 1 RN ¾ NPT x 1 cr RN 1 x 1¼ RN 1 x 2 RN 2 x 2½ RN 2 x 3 RN 3 x 4 RN 1 x 1¼ SS RN 1 x 2 SS RN 2 x 2½ SS RN 2 x 3 SS RN 3 x 4 SS