Buderus O-Ring 6.86mm x 1.87mm 7100112

The Buderus O-ring 6.86 mm x 1.87 mm is a small sealing component used within the hydraulic and gas-carrying assemblies of Buderus gas boilers. It is supplied by Buderus under part number 7100112. O-rings of this type seat into a groove and compress between mating faces to prevent weeping at joints, unions and valve bodies.

• Visible weeping or a film of water at a union, joint or valve body where the O-ring seats
• The O-ring has flattened, hardened or taken a permanent set and no longer seals under compression
• A joint continues to seep after correct tightening, indicating the seal rather than the fastener is at fault
• The O-ring is cut, nicked, swollen or distorted on inspection during service work
• Evidence of a previous leak, such as corrosion staining or scale tracking, around the sealing face

• Confirm the dimensions match the O-ring removed: 6.86 mm x 1.87 mm
• Check the boiler model against the fitment list above before ordering
• Confirm how many O-rings the job requires — this part is supplied as a pack of 10
• Inspect the groove and mating face for damage, as a scored or corroded seat will not seal with a new O-ring alone