Product Review

*Made of high density polyethylene. *Requires use of hole saw for installation of grommets. *For 3" fitting use a 3 7/8" hole saw. *For 2" fitting use a 2 3/4" hole saw. *For 1 1/2" fitting use a 2 1/4" hole saw. *After grommet is seated in tank, upper lip must be sealed with silicone bathtub caulk. 21 Gallon Holding Tank MFG# H-42 H42 UPC# 765053040600