Anyone know if there is a backwater (check) valve that can be installed directly on the drain of a sink? I did a very quick search on the internet, and looks like most of the valves are designed for the main sewage line heading out of the building. I have a particular application where I only care about preventing backflow to a particular sink. Any advice appreciated.
I've cross posted this in plumbing engineering as well.
I've cross posted this in plumbing engineering as well.