• Manufacturer: Waterway 

• Type: Pool Gasket/O-ring 

The 711-4050B Waterway gasket measures 1 1/2 inches in diameter and has an o-ring rib on one side. This pool gasket is manufactured by Waterway for heaters but can be used for several different unions. Gaskets are essential for creating a water-tight seal on several pieces of pool and spa equipment, protecting the equipment from circulating unwanted air or leaking water.