METAL-FAB® B-FLEX™ Flexible Duct Connector, Series: MDWF, 4 in Inside Dia, 5 ft Length, For Use With: Double Wall Type-B Gas Vent, Galvanized, Domestic
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- Products tested and listed to UL441 requirements to ensure safety and efficiency
- Use as a connection of appliance to common B-Vent or as a segment of B-Vent except where it penetrates the structure, walls, floors, ceilings, roof