The DuraVent 6" Factory Built DuraFlex 316 Stainless Steel Reline Kit is a premium factory-built chimney relining system designed to restore and improve the performance of existing chimney installations. Manufactured from 316 stainless steel, this 6-inch chimney liner kit delivers superior corrosion resistance for wood stoves, fireplace inserts, solid-fuel appliances, non-condensing gas appliances, oil-fired systems, and coal-burning applications. Its flexible design allows for straightforward installation through factory-built chimneys while maintaining excellent flue gas flow, chimney draft, and heating efficiency. The kit is UL 1777 and ULC S635 listed, ensuring safe and code-compliant venting.

Engineered for long-lasting durability, the DuraFlex 316 stainless steel reline kit helps protect factory-built chimneys from heat, moisture, and corrosive combustion byproducts while extending chimney service life. Ideal for chimney restoration, fireplace insert upgrades, and venting system replacement, this 6-inch stainless steel chimney liner kit provides dependable performance and enhanced appliance safety. Backed by DuraVent’s trusted venting technology, it is a reliable solution for residential and commercial chimney relining projects.