Use this product to plug the 3" hole in the lid of the Instadry Sump Kit™ once you have determined that Radon and other soil gases are not a threat. The 3" hole is used to mitigate soil gas such as Radon, Methane, Acidtone etc. Check with your local building department on how your local government requires you to mitigate these and other gases.
This product also allows you to drain Air Conditioning drain lines as well as a dehumidifier drain by drilling the proper size hole in the side of the pipe.