Miscellaneous DWV Plumbing Supplies
Bell traps are used for floor drains in basements and garages. They come in PVC and cast iron.
The auto plumbing vent is used in a 1 1/2" drain line, normally connected in a Y or tee and is used to provide venting when the vent stack is too far away from a sink. (Check with your local codes before using this for a vent)