Various
1-1/4" x 1-1/4" flexible coupling with 2 stainless steel clamps, connects cast iron or plastic to cast iron or plastic.
Boshart 1-1/4 In. Insert x 1-1/4 In. MIP Polypropylene Hose Adapter
Compression Nut, Brass, 1/4-In.
Eastman 1/2 in. OD Epoxy-Coated Gas Connector - FIP x MIP
Eastman 3/8 in. OD Epoxy-Coated Gas Connector - FIP x MIP
Charlotte Pipe PVC-00820-0600HA DWV Schedule 40 Offset Closet Flange, 4" x 3"