This part is located within the combustion chamber section. The combustion chamber is a sealed chamber within the appliance that contains the burner, electrodes, etc. It also captures all of the combusted gases and allows the fan to vent them via the flue

Brand Name	Riello
Colour	None
Material	None
Manufacturer Model No	3006001
Wear Type	None
Type	Tube
Certifications Met	None
Country of Origin	None
Protects From	None
Waterproof	None
Number of Pockets	None
Waist Size	ab35cf94gz
Toilet Cistern Capacity	FTW
ERP Rating	Not Applicable
Supplier Part Number	RBS26D