Riello 3005856 Oil Burner Flange Mounting Gasket 40 Series F3 F5

Product Description

The Riello 3005856 is a flange mounting gasket designed for use with Riello 40 Series F3 and F5 oil burners in residential heating applications. This gasket creates a secure, airtight seal between the oil burner and the appliance mounting flange, preventing combustion air and flue gas leaks that can reduce system efficiency or create safety hazards. Proper sealing at the burner-to-boiler or burner-to-furnace interface is critical in any oil-fired heating system. A damaged, worn, or missing mounting gasket can allow uncontrolled air infiltration, leading to combustion problems, sooting, and reduced heat output. Replacing the gasket with a manufacturer-specified part like the Riello 3005856 ensures the burner operates exactly as designed. HVAC technicians and oil burner service professionals working on Riello 40 Series equipment will recognize this as a standard maintenance and replacement component. The Riello 40 Series is one of the most widely installed residential oil burner product lines, and keeping the correct replacement parts on hand is essential for efficient service calls. This gasket carries CSA B139 approval, which is the Canadian Standards Association standard for installation of oil-burning equipment, confirming the part meets recognized safety and performance requirements. Whether you are performing a seasonal tune-up, responding to a no-heat service call, or replacing a burner after a long service life, having the correct flange mounting gasket ensures the burner seals properly to the appliance. This is a genuine Riello replacement part, engineered to match the original specifications of the 40 Series F3 and F5 burners. It is a straightforward, reliable component that oil burner technicians rely on to complete professional-grade installations and repairs.

• Designed specifically for Riello 40 Series F3 and F5 residential oil burners
• Creates an airtight seal at the burner-to-appliance mounting flange interface
• CSA B139 approved for oil-burning equipment installations

Product Highlights

The Riello 3005856 flange mounting gasket is a genuine replacement part for Riello 40 Series F3 and F5 oil burners, delivering a code-compliant, airtight seal that supports safe and efficient residential heating system operation.

Product Information

Standard Information

• Brand: RIELLO
• Manufacturer Part Number: 3005856

Technical Specifications

• Item Type: Mounting Gasket
• Used On: Riello 40 Series F3 and F5 Oil Burners
• Approval: CSA B139
• Application: Residential