[Ducay]

Originally Posted by fleuryisgod

https://www.homedepot.ca/en/home/p.t...001043630.html

I used this when I had a drain that a snake wouldn't get out. Worked very well for me.

Those can be effective, but in this case the clog is after 2 open-air points where the pressurized gas would just go (rather than pushing on the clog).