The Pentair 71426 Collar and Rotor Union O-Ring is a crucial component in HVAC systems, designed for maintaining a secure and leak-proof seal in various union joints. This high-quality Union O-Ring features a 2-1/4" inner diameter (ID) and a 1/8" cross-section, making it ideal for ensuring tight connections between pipes and fittings in HVAC and pool equipment. The O-ring is specifica... https://www.usapoolshop.com/71426-pentair-collar-and-rotor-union-o-ring