The 2″ Union O-Ring is an essential sealing ring for 2″ union fittings in hot tubs and spa plumbing systems. Made from flexible, water-resistant material, this O-ring creates a snug, leak-proof seal between union halves to prevent water escape under pressure.
Regular replacement of union O-rings can help maintain consistent water tightness and prevent minor leaks that may lead to larger issues. Always ensure correct sizing before installation.

