National Chimney
National Chimney M-Flex Standard Liner Kit with Tee
National Chimney M-Flex Standard Liner Kit with Tee
The National Chimney M-Flex Standard Liner Kit with Tee, a premium all-fuel chimney liner kit designed for wood-burning, oil, coal, and gas appliances. This UL 1777 listed stainless steel chimney liner delivers superior durability, corrosion resistance, and safe, efficient venting performance for long-term reliability.
Ideal for chimney relining projects, the M-Flex Standard Liner Kit provides a complete venting solution with a durable stainless steel construction and integrated tee for secure connection and easy installation. This chimney liner kit enhances draft performance, improves appliance efficiency, and helps reduce creosote buildup. Perfect for upgrading existing masonry chimneys, it ensures reliable all-fuel venting for wood stoves, fireplaces, and oil or gas heating systems, long-lasting safe chimney venting performance.
Features
- Premium 316 Stainless Steel Chimney Liner – Manufactured from high-quality .006” thick 316 stainless steel, this chimney liner kit delivers exceptional durability, heat resistance, and long-lasting performance for chimney relining systems.
- UL 1777 Certified All-Fuel Chimney Liner Kit – Fully tested and UL 1777 listed, ensuring safe, reliable venting for wood, oil, coal, and gas appliances in residential and professional installations.
- Complete Pre-Packaged Chimney Liner Kit – Includes a flexible stainless steel liner, top kit, and two-part tee with removable snout and end cap, providing everything needed for a fast and efficient installation.
- Flexible & Corrosion-Resistant Design – Engineered for easy installation in existing masonry chimneys, this flex chimney liner resists corrosion, moisture, and extreme temperature changes for long-term reliability.
- Strong Interlocking Construction – Features a secure interlocking system that ensures a gas-tight and watertight seal, improving safety and overall chimney venting performance.
- Two-Part Tee with Cleanout Access – Includes a durable chimney tee with snout and end cap, making inspections and maintenance simple and convenient.
- Optimized for Multiple Fuel Types – Compatible with wood-burning stoves, oil furnaces, coal systems, and gas appliances, making it a versatile all-fuel chimney liner kit.
- Corrugated Flexible Construction – Designed to expand and contract with heat cycles, ensuring structural integrity and consistent performance over time.
- Available Size Options – Offered in 6-inch and 8-inch diameters, with 25-foot and 35-foot length options to suit a variety of chimney configurations.
- Complete Installation Top Kit Included – Comes with a rain cap and 13” x 13” top plate, providing full weather protection and a professional-grade chimney finishing solution.
- Lifetime Warranty Protection – Backed by a lifetime warranty, ensuring long-term peace of mind and dependable chimney system performance when properly maintained.
Specifications
| Specification | 6" Diameter | 8" Diameter |
|---|---|---|
| Material | 316 Stainless Steel (.006” thick) | 316 Stainless Steel (.006” thick) |
| Liner Lengths | 25 ft, 35 ft | 25 ft, 35 ft |
| Certification | UL 1777 Listed | UL 1777 Listed |
| Fuel Compatibility | Wood, Oil, Coal, Gas | Wood, Oil, Coal, Gas |
| Tee Snout Length | 10” removable snout | 10” removable snout |
| Top Kit Includes | Rain cap, 13” x 13” top plate | Rain cap, 13” x 13” top plate |
| Warranty | Lifetime Transferable | Lifetime Transferable |
Warranty
- Limited Lifetime Warranty