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Metal-Fab 5 Inch to 8 Inch Type B Round Chimney Pipe Increaser

Metal-Fab 5 Inch to 8 Inch Type B Round Chimney Pipe Increaser

$50.30
Was $59.99
Save $9.69 (16%)
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Product Details

Manufacturer: Metal-Fab
Metal-Fab Part Numbers: 5MIX8
Item Number: MFB-5MIX8
UPC: 622417101622
Part of Metal-Fab's versatile Type B line, this Metal-Fab 5 Inch to 8 Inch Type B Chimney Pipe Increaser is exactly what you need if you want to increase your round vent diameter from five to eight inches.

Customer Q&A with Product Specialists

Darrell from asked:
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We're glad to help you complete your order. The Metal-Fab 5 Inch to 8 Inch Type B Round Chimney Pipe Increaser is in stock and ships the same business day. If checkout isn't working, reply with the error message or the step where it stops, and we'll help you from there. You can also place your order by phone at 800-203-1642, Monday through Friday, 9:30 AM to 6:30 PM Eastern.
Answered by: Tyler M. on Oct 27, 2026

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Customer Reviews

Metal-Fab 5 Inch to 8 Inch Type B Round Chimney Pipe Increaser
Star - 1 Star - 2 Star - 3 Star - 4 Star - 5
By Newton D.

A Solid Increaser for the Job

This Metal-Fab chimney pipe increaser is exactly what I needed to connect my 5-inch flue to an 8-inch chimney system. It fits snugly and seems to be made of durable material, ensuring a secure connection.
Star - 1 Star - 2 Star - 3 Star - 4 Star - 5
By Daniel M.

Works as Expected for Chimney Pipe Size Change

This increaser is a solid piece that does exactly what it's supposed to do – step up your chimney pipe diameter. If you need to transition from a 5-inch to an 8-inch Type B round flue, this is a reliable and straightforward solution to get the job done right.
3.0
Star - 1 Star - 2 Star - 3 Star - 4 Star - 5
2 Reviews
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