DuraFlex SS Connector Adaptor for 4" Chimney Liner - 4DFS-FC : A 4" inner diameter vent pipe is required for this unit. DuraFlex's connector adaptor is used to join two 4" DuraFlex pieces together or to connect a fireplace insert to a DuraFlex vent system. Screws or pop rivets are used to join the parts. The DuraFlex SS components can be utilized in appliances that burn wood pellets, coal oil, or non-condensing gas. It's a flexible relining material for masonry chimneys. A 0" clearance to masonry is allowed when the Dura-Vent Two-Ply Insulation Sleeve is utilized with the liner.

DuraFlex Connector Adaptor for 4-in. pipe Used to connect 2 pieces of DuraFlex together or connect DuraFlex to a fireplace insert Attaches with screws or pop rivets