Alpha Gasket 80 D 3.013390

The Alpha 3.013390 is a gasket, size 80 D, supplied as part of a seal kit. It is used in Alpha C and CB series boilers to create a tight seal between mating surfaces, preventing leaks of water or flue gases. This gasket is a critical sealing component in the appliance's assembly. A worn or damaged gasket can lead to water leaks, pressure loss, or inefficient operation. Replacing it with the correct part ensures the boiler continues to operate safely and efficiently. As part of a seal kit, this gasket may be replaced alongside other seals and O-rings during a service or repair. It is important to use the correct gasket to ensure a proper seal and prevent future leaks.

• Water leaking from the appliance casing or around joints
• Visible damage, flattening or cracking of the gasket
• Recurring pressure loss or overheating
• Signs of corrosion or deterioration around the seal
• Water pooling under the boiler
• Error codes related to pressure or temperature

• Check your boiler's GC number and model against the compatibility list.
• Confirm the part number 3.013390 matches the gasket you are replacing.
• This gasket is supplied as part of a seal kit; consider whether the complete kit is needed.
• Check for any visible damage to the gasket seat or mating surfaces.
• Ensure the replacement gasket is fitted correctly to avoid leaks.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.