Baxi Filter Pin 7740216

The Baxi filter pin, part number 7740216, is a small internal component of the filter assembly fitted to Baxi 818 System and 818 System Erp boilers. It locates and retains the filter element within the housing, so debris carried in the system water is trapped before it can reach the boiler's heat exchanger and waterways. Because it sits inside the filter body, the pin is exposed to the same sludge, magnetite and scale the filter is designed to capture, and it is normally replaced when the assembly is stripped down for cleaning or repair. It is a practical item to keep on the van for servicing work on this boiler family.

• Heavy sludge, magnetite or scale deposits around the pin when the filter housing is opened
• The filter element will not seat correctly or stay located in the housing
• Visible corrosion, pitting or deformation on the pin
• Recurring circulation or flow faults traced back to the filter assembly
• Water weeping from the filter housing after a service or element change

• Check the GC number and, where relevant, the serial number on the appliance data badge against the compatibility list before ordering; the 818 System Erp listings are grouped by serial number prefix.
• Alternative part number 1795802 identifies the same item.
• Confirm the filter housing seal is serviceable before refitting the assembly.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.