Because of its corrosive nature, Drano can cause toilet bowls to crack, PVC pipes to melt or break and the glue that holds pipes together can be eaten away. If any of these things happen, you're going to be left with an inoperable plumbing system and costly repairs.Apr 2, 2019
Can you leave Drano Max Gel overnight?
Can you leave Drano Max Gel in overnight? Just like any other commercially available chemical drain cleaners, it is advised that you let the product sit for about 15 minutes before flushing it down with water. ... For more significant clogs, you can apply the Drano Max Gel overnight.Jan 14, 2021