O-ring 21.5x3 ep70 tfl (10 ps) De Dietrich 7656926

An O-ring with dimensions 21.5x3 mm made from ep70 tfl material is a high-quality sealing ring used in various boiler and burner applications. This O-ring provides a reliable seal against fluids and gases, preventing leaks in connections such as water pipes, gas valves, or pump unions. When replacing worn seals, using this specific size and material ensures compatibility and long-lasting performance in your heating system.