Brochure
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GAS APPLICATION 
Pre-insulated Chimney Liner for Category 1 
Gas Heating Equipment & Gas Fireplaces 
Insul-Liner is another “simple solution” from Z-FLEX. The National Fuel Gas Code (NFPA 54, ANSI Z223.1) 
recommends, but does not require, that liners be insulated in certain situations. 
A good rule of thumb is to use an insulated liner in exterior chimneys or when a brick chimney has no clay liner 
at all. The insulation will keep the flue gases warm to prevent condensation. Also refer to the equipment 
manufacturer’s instructions for their recommendations. 
Insul-Liner can be substituted for B-Vent when relining a masonry chimney.
Insul-Liner is insulated at the factory and protected with an outer aluminum jacket. This eliminates the time 
needed to insulate on the jobsite and prevents damage to the insulation during installation. Simply remove 
from the box and install.
When to Z-FLEX a Chimney 
(from National Gas Code)
• When a masonry chimney has no liner at all
• When damage to existing chimney lining is evident
• When retrofit appliance has fan-assisted combustion 
and is vented alone 
• When additional or replacement equipment is installed 
or an appliance is converted to gas from another fuel
• When the existing chimney is oversized relative to 
heating requirement
When to Z-FLEX a Chimney 
Aluminum Chimney GAS LINER KITSGAS LINER KITS
Z-FLEX Aluminum Chimney Liner Kits come complete with everything 
you need to quickly and easily install a professional venting system. 
Z-FLEX liner is manufactured by using a dead soft aluminum strip 
which is spirally wound and MECHANICALLY joined together forming 
an air-tight and leakproof TRIPLE-LOCK seam.
Z-FLEX’s specially designed ‘deep corrugations’ provide for greater 
flexibility and ease of installation. The result is a clearly superior 
product offering incredible longevity.
Z-FLEX chimney liners are listed with Underwriters Laboratories, File MH 13681
Insul-Liner Gas 
Fireplace Kit Includes: 
• Insulated Aluminum Liner
• Chimney Flashing
• Rain Cap 
• Fireplace Connector 
• 3 Screws 
Part # 2GIAFKX ___Dia. ___Lgth. 
Available in 4”, 5”, 6” Diameters & 15’ Lengths. 
Z-FLEX INSUL-LINER™
Insul-Liner Kit Includes: 
• Insulated Aluminum Liner
• Chimney Flashing
• Rain Cap 
• Mortar Collar 
• 3 Screws 
Part # 2GIAKXX ___Dia. ___Lgth. 
Available in 3”–8” Diameters & 15’ Lengths. 
Aluminum Liner Kit Includes: 
• 2-Ply Aluminum Liner
• Chimney Flashing
• Rain Cap 
• Mortar Collar 
• 3 Screws 
Part # 2GACKIT __Dia. ___Lgth.
Available in 3”- 10” Diameters & 15’ - 50’ Lengths.
Gas Fireplace Kit Includes: 
• 2-Ply Aluminum Liner
• Chimney Flashing
• Rain Cap 
• Fireplace Adapter (Single Appliance)
• 3 Screws 
Part # 2GAFKXX ___Dia. ___Lgth.
Available in 3” - 10” Diameters & 15’ - 50’ Lengths.
Additional 
Length Aluminum 
2-Ply Liner
Part # 2GAXXXX
 ___Dia. ___Lgth.
Available in multiples of 5’ to 50’.
Liner 
Coupling
Part # 2CNNTRG ___Dia. 
Available in 3”–10” diameters
Custom sizes available. 
Used to attach two lengths of pipe.
Nose Cone
Part # 2NCXXXX ___Dia. 
Available in 3”, 4”, 5”, 6”, 7”, 8”, 10” Diameters.
Galvanized “Y”
Part # 2GAYXXX ___Dia. 
Available in: 3” to 8” Diameters.
Connects two vent connectors to common vent. 
B-Vent 
Connector
Part # 2CNNBFC ___Dia. 
Available in 3”–10” diameters 
Connects B-Vent to Z-FLEX liner.
Flashing
• 16”x 16” Plate 
• Galvanized 
Material 
• Strong 
Fireplace 
Connector
• Gas Fireplace 
Kits only
Mortar Collar 
• Simple to Install 
• Clean Look 
• Corrosion-resistant
Material
Flexible Aluminum Liner
Special Characteristics 
• Patented Triple-Lock Mechanical Joint
• Manufactured from Dead Soft Pure Aluminum 
• 
Significant Advantages 
• Greater Flexibility
• Exceptional Strength 
• Corrosion Resistant
• Air-tight and Leakproof 
• Vibration Deadening Properties
• Light Weight
• Highly Puncture Resistant 
• High Pressure Rating
NEW
BIRD PROOF
RAINCAP
Rain Cap
• Wind-proof 
• Bird Resistant
• Attractive
• Prevents Entrance of
Moisture/Debris







