DuraFlex SS Stainless Steel Chimney Liner - 4" x 15-ft. - 4DF316-15: A 4" inner diameter vent pipe is required for this unit. Use this stainless-steel chimney liner from DuraFlex to meet the UL1777 criteria for both masonry chimneys and wood burning appliances. Designed to be used in tandem with the DuraVent DuraFlex Zero Clearance Insulation Sleeve, this liner protects a masonry chimney from any negative effects due to flue condensation and promises safe and efficient venting for a variety of heating appliances including gas wood pellet oil or wood. This DuraFlex stainless steel chimney liner is a win-win option with a limited lifetime warranty!

DuraFlex 15 Stainless Steel Chimney Liner 4-in. diameter Light-weight .006" metal thickness makes it stronger than other light liners Most economical liner for straight chimneys Manufacturers limited lifetime warranty