Metal-Fab 5MFS – Type B Gas Vent Firestop – 5″

Metal-Fab is the only B-Vent manufacturer with UL approval to connect the male end into the female end of all competitive UL listed B-Vent brands, increasing product versatility. Did you know that by simply connecting using three (3) quarter inch sheet metal screws to secure creates a UL listed connection?

The Metal-Fab 5MFS Firestop is designed for use with 5″ Type B gas vent systems, maintaining the required clearance to combustibles when the vent passes through a floor or ceiling. It provides a secure, code-compliant installation point while supporting proper vent alignment and thermal separation. Built from durable galvanized steel, this firestop ensures long-lasting safety and performance for residential and light commercial gas appliance venting systems.

Features:

• Manufacturer: Metal-Fab
• Part Number: 5MFS
• Type: Type B Gas Vent Firestop
• Application: Maintains 1″ clearance to combustibles where vent passes through a floor or ceiling
• Size: 5″ nominal diameter
• Material: Galvanized steel outer wall with aluminum inner wall
• Design: Flat plate with centered spacer ring for clearance and support
• Connection Type: Compatible with Metal-Fab Type B gas vent systems
• Certification: UL 441 listed for Type B gas vent installations

HSS1810393