Stainless Steel Chimney Flue Pipe Reducer Adaptor | 18 Sizes

Stainless Steel Chimney Flue Pipe Reducer & Adaptor

Connect chimney liners, stove pipes, and ventilation systems with confidence using this durable stainless steel flue pipe reducer. Engineered for a secure, airtight fit, this universal adaptor bridges two different pipe diameters to ensure your heating, air conditioning, or venting system runs smoothly and safely. Available in 18 size combinations to suit virtually any residential or commercial setup.

Made in Mainland China.

Key Features

• Universal Compatibility: Fits chimney liners, twin-wall flue systems, masonry chimneys, galvanized round perimeter pipe, and more.
• Premium Stainless Steel: Built to withstand high temperatures and resist corrosion for long-lasting, reliable performance.
• Wide Size Range: 18 different reducer configurations available — from Ø60mm/Ø50mm up to Ø120mm/Ø100mm — covering most standard pipe diameters.
• Versatile Use: Ideal for wood stoves, gas appliances, heating systems, air conditioning, and all rigid-pipe ventilation applications.
• Easy Installation: Clean the pipe surface with a wire brush before applying high-temperature stove cement or rated caulking material for a sealed, secure connection.
• Relining Ready: Can be used to reline existing masonry chimneys with ease.

Specifications

Package Contents

• 1 × Stainless Steel Flue Pipe Reducer / Adaptor (size of your choice)

Installation Tips

Before sealing, thoroughly clean the pipe joint area using a wire brush to remove any rust, residue, or debris. Apply a high-temperature-rated stove pipe cement or caulking compound around the joint to achieve a fully sealed, compliant connection. Always follow local building codes and manufacturer guidelines for chimney and flue installations.

For guidance on safe chimney and venting standards, refer to the U.S. Consumer Product Safety Commission – Carbon Monoxide Safety Center.

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Important Notes

• Actual color may vary slightly from images due to monitor brightness and lighting conditions.
• Please allow for slight measurement deviation (±1–2mm) due to manual measurement.

Learn more: Chimney

Frequently Asked Questions

Q: What types of systems is this stainless steel flue pipe reducer compatible with?

A: This chimney flue reducer adaptor is compatible with chimney liners, twin-wall flue systems, masonry chimneys, galvanized round perimeter pipes, and rigid-pipe heating, air conditioning, and ventilation systems. Its universal design makes it suitable for wood stoves, gas appliances, and more.

Q: How do I choose the right size reducer for my chimney or stove pipe?

A: Measure the outer diameter (OD) of both pipes you need to connect — the larger diameter and the smaller diameter. Then select the matching size from the 18 available configurations (e.g., Ø100mm/Ø80mm means it reduces from 100mm down to 80mm). If you are unsure, consult a certified chimney or HVAC professional.

Q: What sealant should I use when installing this flue reducer?

A: Use a stove pipe cement or caulking material that is specifically rated for high-temperature applications and compatible with wood stoves or your appliance type. Clean the joint area with a wire brush before applying the sealant to ensure maximum adhesion and a proper seal.

Q: Is this reducer suitable for relining an existing masonry chimney?

A: Yes. This stainless steel flue reducer can be used as part of a chimney relining project, helping to connect new liner sections to existing masonry chimney structures of differing diameters.