O-ring for flow/return flange De Dietrich JJJ137307225

The o-ring for flow/return flange creates a tight seal between the flange and pipe connections, preventing water leaks. Made from durable rubber, it withstands temperature fluctuations and pressure changes. This inexpensive part is critical for maintaining system pressure and preventing water damage. Ideal for boiler repairs or as a spare during routine maintenance of heating equipment components.