DuraVent
DuraVent 20' Flex Pipe Length DuraFlex 316 Stainless Steel Tee Kit
DuraVent 20' Flex Pipe Length DuraFlex 316 Stainless Steel Tee Kit
The DuraVent 20' DuraFlex 316 Stainless Steel Tee Kit is a high-performance flexible chimney liner system designed for dependable masonry chimney relining and efficient venting. Manufactured from premium 316 stainless steel, this 20-foot chimney liner tee kit delivers superior corrosion resistance for wood-burning fireplaces, wood stoves, non-condensing gas appliances, oil-fired systems, and coal-burning applications. The flexible liner design allows easier installation through chimneys with minimal offsets, while the integrated tee provides a secure connection and convenient cleanout access. The DuraFlex 316 system is UL 1777 and ULC S635 listed for safe, code-compliant performance.
Engineered for long-term durability, the DuraFlex 316 stainless steel chimney liner kit helps improve chimney draft, enhance flue gas flow, and protect masonry chimneys from heat and corrosive combustion byproducts. This 20-foot flexible chimney liner tee kit is ideal for fireplace inserts, furnaces, boilers, and solid-fuel heating systems, providing a reliable chimney restoration solution. Backed by DuraVent’s trusted engineering, it offers professional-grade performance for residential and commercial venting applications.
Features
- DuraVent 20' DuraFlex 316 Stainless Steel Tee Kit: Complete 20-foot flexible chimney liner tee kit designed for reliable masonry chimney relining and high-performance venting applications.
- Premium 316 Stainless Steel Construction: Built with durable 316 stainless steel alloy for superior corrosion resistance, strength, and long-lasting protection against harsh flue conditions.
- Integrated Tee & Cleanout Design: Features a secure stainless steel tee connection that simplifies installation and provides convenient access for chimney cleaning and maintenance.
- Available in Multiple Diameter Sizes: Offered in 3" to 8" diameters to fit various wood stoves, fireplace inserts, fireplaces, furnaces, boilers, and oil appliances.
- Multiple Flex Length Options: Available in 15’, 20’, 25’, 30’, and 35’ lengths to accommodate different chimney heights and installation needs.
- Flexible Chimney Liner System: Easily adapts to chimney pathways with minimal offsets, making installation faster while maintaining efficient flue gas flow and proper draft.
- Compatible with Solid Fuel, Gas & Oil Appliances: Designed for solid-fuel, non-condensing gas, and oil-fired appliances, providing a versatile venting solution.
- Enhanced Corrosion Resistance: The 316 stainless steel chimney liner provides added protection for demanding applications, including coal-burning appliances and sulfur-rich fuel environments.
- Improves Chimney Performance: Helps restore chimney efficiency, protect masonry flues, and support safe operation of heating appliances.
- UL Listed DuraFlex 316 Series: Engineered for safe, code-compliant chimney liner replacement and fireplace insert venting installations with trusted DuraVent quality.
Specifications
| Model | Size | Flex Length |
| 3DF316-20KT | 3" I.D | 20 ft. |
| 4DF316-20KT | 4" I.D | 20 ft. |
| 5DF316-20KT | 5" I.D | 20 ft. |
| 55DF316-20KT | 5.5" I.D | 20 ft. |
| 6DF316-20KT | 6" I.D | 20 ft. |
| 7DF316-20KT | 7" I.D | 20 ft. |
| 8DF316-20KT | 8" I.D | 20 ft. |
| Materials | 316 Stainless Steel | |
| Construction | Single-Wall | |
| Clearance | 0” clearance for gas, oil, and pellet applications. | |
| Clearance | 1” clearance to masonry for wood-burning | |
| Listings | Listed to UL 1777 and ULC S635 (MH45609). | |
| Warranty | Limited-lifetime warranty | |