On Nov 16, 8:55 am, Phisherman wrote:
I'm building a bathroom wall and need to install a new PVC double
san-T (2") in the vent stack before installing the wall studs. What
do plumbers use to temporarily close off the open pipes for a day or
two? I heard a wet rag will work to slow sewer gases, but I may need
something better yet not permanent. TIA

Plastic bag and a rubber band works for me.