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Metal-Fab 4 Inch Type B Adjustable Oval Chimney Pipe Length - 12 Inch

Metal-Fab 4 Inch Type B Adjustable Oval Chimney Pipe Length - 12 Inch

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Product Details

Manufacturer: Metal-Fab
Metal-Fab Part Numbers: 4MO12A
Item Number: MFB-4MO12A
UPC: 622417101172
This 4 Inch Type B Adjustable Oval Chimney Pipe Length is a great choice for any homeowner looking to save space. As part of Metal-Fab's oval line, this pipe is specifically designed to fit in standard stud walls, greatly reducing the size of the area required for your installation. An advanced dual-wall construction also allows this vent pipe to be very efficient without taking up a lot of space; it can even be used with just a single inch of clearance to combustible materials.

Another great feature of Metal-Fab Type B Oval Chimney Pipe is its convenient connection system. Just push two pipes together and snap, you've got a secure joint. There's no need for tools or cumbersome fasteners. As a result, Metal-Fab chimneys are extremely safe, yet require a fraction of the time - and therefore money - to install.

When you're trying to keep a home running smoothly every cent counts. With a low purchase cost and superior performance, this Metal-Fab 4 Inch Type B Adjustable Oval Chimney Pipe Length is exactly what you need to maximize your home renovation budget.

Customer Q&A with Product Specialists

Erol S. from rhode island asked:
How is this adjustable, and what are the smallest and largest possible installed lengths?
How is this adjustable, and what are the smallest and largest possible installed lengths?
The 12-inch designation in the product name refers to its catalog size, not its installed length. This Metal-Fab 4 Inch Type B Adjustable Oval Chimney Pipe Length is a telescoping section where the inner pipe slides within the outer pipe, allowing the installed length to adjust from a minimum of 3 inches to a maximum of 9 inches. This adjustability is useful for compensating for gaps in the vent run without needing to cut the pipe. As detailed in the Metal-Fab Type B Vent brochure, the components connect using a snap-together joint, requiring no tools or fasteners. The double-wall construction also ensures a 1-inch clearance to combustibles.
Answered by: Tyler M. on Aug 10, 2026

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