Twin-Wall Chimney

High quality, air insulated Gas Vent for Natural and Propane Gas applications. This Double Wall Gas Vent features an aluminum inner liner and zalutite outer casing, Selkirk’s non-positional coupling system with our unique Lock-Tab feature. 3", 4", 5", 6" inner diameters. Selkirk Insta-Lock Gas Vent is designed for maximum safety and performance. They are covered by the manufacturers limited Lifetime Warranty.