Metal-Fab 4M90 4 Double Wall Type B Gas Vent 90 Deg Adjustable Last Chance

The Metal-Fab 4M90 is a double wall adjustable elbow designed for gas vent applications. This product features a four inch nominal size and allows for a bend angle of 90 degrees. Constructed with a combination of aluminum alloy for the inner wall and G90 galvanized steel for the outer casing, this elbow is built to withstand various operation conditions.

• Adjustable angle from 0 to 90 degrees.
• 360-degree rotating collar for vent pipe orientation.
• Compliant with UL 441 and NFPA standards for gas vent systems.

Product Highlights

This product is ideal for use with type B gas vent systems, facilitating installations in gas boilers, fireplaces, furnaces, and heaters. The five-piece construction ensures a secure fit and enhances airflow efficiency, optimizing your heating applications.

Product Information

Standard Information

• Brand: Metal-Fab
• MPN: 4M90

Technical Specifications

• Material: Aluminum alloy (flue), G90 galvanized steel (casing)
• Size: 4 inches
• Angle: 90 degrees
• Material Thickness: 0.012 inches (inner wall), 0.018 inches (outer wall)
• Applicable Standards: UL 441, NFPA 54, NFPA 211
• Weight: 1.1 lbs
• Dimensions: Length 9.5 inches
• Connection Type: Hub x Spigot