Junta tórica De Dietrich S101664

This O-ring is a circular rubber seal used in various connections within boiler and burner equipment to prevent leaks. It fits into grooves in flanges, valves, or pipes, creating a tight barrier against water and gas. Over time, O-rings can dry out or crack, leading to drips or pressure loss. Replacing them is a simple yet effective step during any heating system repair or maintenance.