638-124

This 4-inch by 6-inch B-Vent length is a high-quality double-wall gas vent pipe designed for the safe and efficient exhaust of Category I natural gas or liquid propane (LP) appliances. Engineered for durability, this Type B vent component features an aluminum inner liner to resist corrosion and a galvanized steel outer casing for maximum structural integrity. The double-wall construction creates an insulating air space that helps maintain high flue gas temperatures, ensuring a strong draft while minimizing heat transfer to nearby combustible materials. Ideal for short extensions or connecting HVAC components, this metal venting piece is a critical part of residential and commercial heating systems. It provides a secure fit for venting systems in attic spaces, crawlspaces, or utility rooms, making it a reliable choice for professional contractors and DIY appliance repair projects.
Type: Metal Venting / Type B Gas Vent
Size: 4-inch Diameter x 6-inch Length
Dimensions: 6 inches × 4 inches × 4 inches
Application: Used for venting Category I natural gas and liquid propane appliances, including furnaces, water heaters, and boilers. Suitable for residential and commercial HVAC ventilation systems.
Specifications: Double-wall construction; Aluminum inner wall; Galvanized steel outer wall; Type B Gas Vent classification; Twist-lock or snap-lock connection system.