The Pentair 271096 White Bulkhead Union Replacement Set is intended to provide a safe and leak-free connection . High-quality bulkhead unions are included in this package to replace deteriorated or worn-out parts of your filtering system. These unions, which measure 2.5" x 2.5" x 2" and are painted a crisp white, combine functionality and visual appeal. The way the bulkhead unions fun... https://www.usapoolshop.com/271096-pentair-white-bulkhead-union-replacement-set-pool-and-spa-filter