These rubber grommets allow you to install pipes or fittings in polyethylene waste tanks by simply cutting a hole with a hole saw. These grommets are not necessary if having us spinweld fittings in your tank.
1-1/2" fitting requires a 2-1/4" hole.
3" fitting requires a 3-3/4" hole.
6.49$6.49
59.99$59.99
