DuraVent DuraFlex 4

Find information and product listings for 4 inch flexible chimney liner systems in the DuraVent DuraFlex product line, with an emphasis on choosing the correct system. Flexible chimney liners are intended for qualified relining projects, where the existing masonry chimney and appliance determine liner selection.

Choosing the right item means verifying correct series, 4 inch nominal size, listed appliance application, fitting type, and mounting or termination requirements. The DuraVent DuraFlex label identifies a particular product family. Nominal size alone does not establish compatibility with other brands or other venting designs.