Baxi Gas Plug Assembly 40 kW 5122315

The Baxi air and gas plug assembly, part number 5122315, is a 40 kW-rated plug kit that seals the air and gas pathway where it passes through the appliance casing on high-output Baxi combi boilers. It is supplied by Baxi as a serviceable spare for the Platinum and Duo-tec 40 HE families. Its job is to keep the gas-carrying joint gas-tight and to hold the air and gas route correctly aligned at the casing entry point.

• A smell of gas or a detected leak at the casing entry point during a tightness test
• Combustion readings drifting outside the expected range for the appliance, with no other obvious cause
• Unstable or erratic flame picture traced back to the air and gas connection at the casing
• Visible damage, distortion or perishing on the plug or its sealing face after casing work
• Repeated nuisance lockouts on ignition following disturbance of the air and gas route

• Confirm the appliance GC number on the data badge matches one of those listed above before ordering
• Check the model and serial details against the compatibility list, as the same appliance name can appear under more than one GC number
• Inspect the existing sealing face and any gasket or O-ring at the joint, and replace it if it is compressed, split or hardened
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.