Item # bci1763276

DuraVent 3" Inner Diameter - DuraFlexSS 316 Flexible Liner Chimney Pipe - Single Wall - 20' Flex Pipe Length

Model: 3DF316-20

Finish: Choose Finish
  • Stainless Steel
    Stainless Steel
    1 In Stock

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Product Overview

DuraFlexSS 316 Collection 3 X 20 Foot Single Wall Chimney Pipe Length

Warranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer.

This DuraFlexSS 316 3 X 20 Foot Single Wall Chimney Pipe Length is the ultimate in flexible components for strength and flexibility. The DuraFlex 316 stainless steel pipe is to be used with wood-pellet, non-condensing gas, wood-burning, and oil appliances. Custom lengths available for 3”-8” diameters. Minimum length of 10’ for custom orders.


  • Inner Diameter: 3"
  • Fuel Types Compatible With: Wood/Oil/Coal, Gas, Pellet
  • UL Listed: Yes
  • Length: 240"
  • Single Wall Construction
  • Limited Lifetime Warranty

DuraFlex 316 is lighter, more economical liners. Excellent when there are minimal offsets in the chimney. DuraFlex 316SS is intended for wood burning, non-condensing gas and oil fired appliances. Where greater corrosion resistance is desired, such as coal-fired appliances, DuraFlex 316 is recommended. DuraFlex 316SS is listed to UL 1777 and ULC S635.

Looking for Simpson Dura-Vent? You found it! Simpson Dura-Vent has changed their name to DuraVent. DuraVent is a recognized technological leader in the venting industry. Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting. The company's research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro. Scientifically proven materials and unequalled engineering make DuraVent products not only the best choice, or safest choice, but the only choice for professional quality venting products.

This product is listed under the following manufacturer number(s):

Dimensions and Measurements

Inner Pipe Gauge
240 in.
Outer Pipe Gauge
Pipe Inside Diameter
3 in.
Pipe Length
240 in.
Product Weight
20 lbs.

Characteristics and Features

Boxed Length
Inner Pipe Material
316 Stainless Steel
Outer Pipe Material
316 Stainless Steel
Pipe Class
Flexible Liner
Pipe Shape
Vent Construction
Single Wall

Electrical and Operational Information

Fuel Type
Coal, Gas, Oil, Wood, Pellet

Warranty and Product Information

Boiler, Fireplace, Furnace, Water Heater
Approved for Commercial Use
DuraFlexSS 316
Manufacturer Warranty
Limited Lifetime
UL Listing Number
UL 1777, ULC S635