It is designed to absorb the expansion of winter freeze-up in swimming pool skimmers. The Large Gizzmo is 16 inches long and installs in big deep skimmers of most in-ground swimming pools. It can also be used in above ground pools too. It has both 1 1/2 and 2 inch threads and features a generous bar style handle. The double threads offer convenience by accommodating most skimmers with one item.

How the Gizzmo Works:  Every pool has a skimmer. When water freezes it expands. The expansion breaks the skimmer. The Gizzmo absorbs the expansion. The water crushes the Gizzmo instead of destroying the skimmer. It's That Simple!  The Gizzmo is designed to absorb the expansion of winter freeze-up in skimmers only. Winterize lines and pool as per manufacturer or dealer instructions. There are many ways to winterize a pool. Consult your local pool service technician or this web site about which method you should use.