638-127

This 4-inch x 12-inch B-Vent adjustable pipe is a critical component for safe and efficient gas-fired appliance exhaust systems. Designed specifically for Category I appliances, such as furnaces, boilers, and water heaters, this double-wall venting pipe ensures proper drafting and thermal insulation to protect surrounding structures. The adjustable design allows for precision fitting between standard pipe lengths, making it ideal for navigating tight spaces or customized venting runs during HVAC installations. Its durable construction is engineered to resist corrosion and handle the high-temperature exhaust gases produced by modern heating equipment, ensuring a long-lasting and reliable seal for your home ventilation system.
Type: Metal Venting
Size: 4-inch Diameter
Dimensions: 12 inches × 4 inches × 4 inches
Application: Used for venting Category I gas-fired heating appliances, including residential furnaces, gas water heaters, and boilers.
Specifications: Double-wall construction for thermal protection, adjustable length for flexible installation, compatible with standard B-Vent systems.