The Middleweight-Flex Chimney Liner

* Available in round and oval cross sections.

About our Middleweight-Flex Liner

Higher Draft • Super Strength • Cost Effective
These double-layer liners are built for super strength and long-lasting durability. The smooth inner wall delivers up to 20% greater draft over equal size corrugated pipe.

• Extremely strong and flexible
• 20% better draft than single wall liners
• Available in round or oval cross sections
• Fully covered under Lifetime’s warranty
• UL listed to 1777 zero clearance standard

Available Specs

We manufacture our liners right here in the USA. They are in stock and ready to ship with the following specs. If you need a size or length that is not shown below, please give us a call. We can customize any liner to fit your needs.

Diameters (inches): 3", 4", 5", 5½", 6", 6½", 7", 8", 9", 10", 12"

Lengths (feet): 20', 25', 30', 35', 40', 45', 50'

Steel Grades: 304L, 316L, AL29-4C