Buderus O-Ring 26.2mm x 3.6mm 7100122

This is a Buderus O-ring measuring 26.2 mm x 3.6 mm, supplied as a pack of 10 under Buderus part number 7100122. It is a sealing component used on Buderus 800 series gas boilers, seating into a groove to form a compression seal at a joint or connection. The ring is a service item, so it is normally replaced when a joint is opened or when a seal is found to be passing.

• Visible weeping or a water trail at the joint the O-ring seals
• The ring has hardened, become brittle, or shows cracking when handled
• A flattened or deformed cross-section where the ring no longer stands proud of its groove
• Scale, corrosion staining or debris trapped around the seal seat
• A joint that continues to seep after being re-tightened

• Confirm the removed O-ring measures 26.2 mm x 3.6 mm, as dimensions are not interchangeable between seal positions
• Check the appliance model against the fit list above before ordering
• Inspect the groove and mating face for scoring, scale or corrosion, as a damaged seat will not seal with a new ring
• Note that this is a pack of 10, so confirm how many seals the repair requires