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COMBUSTIBLE
WALL
FRONT HALF OF
WALL THIMBLE
RIGID
VENT PIPE
masonry (Figure 11)
Step 2. If you have a solid-fuel burning appliance, you will need to use a Wall Pass
Thru to penetrate through the combustible wall safely and connect to the DuraFlex
SS liner inside the masonry (Figure 12). You will need to determine where the
penetration through the wall will be located (be sure to account for required clearance
to combustibles for the connector pipe). You will also need to refer to L403
instructions included with the Wall Pass Thru itself.
Step 3. Once the location of the penetration is determined, use a sabre-saw to cut
a 14-1/2" diameter (7-1/4" radius) opening in the combustible wall. Centered on the
opening, cut a 6-1/2" or 8-1/2" opening in the masonry (see L403 for instructions).
Step 4. Refer to the Insulation Sleeve section of these instructions to prepare the
Flex Liner. Once the Liner is insulated, feed liner down chimney as indicated in the
Basic Instruction section.
Step 5. Attach a Flex Coupler to the end of the Flex Liner (be sure the flow arrow
is in the correct direction). Connect the other end of the Flex Coupler to the Wall
Pass Thru (Figure 12).
Step 6. Secure the Wall Pass Thru in place as directed in L403 Instructions.
RELINING INSTRUCTIONS FOR FIREPLACE INSERTS
VENTING INTO AN EXISTING MASONRY CHIMNEY
Step 1. If you are using a solid-fuel appliance and you do not have the clearances
required by Table 1, you will need to use Insulation Sleeves to maintain proper listing.
NorthlineExpress.com
MORTAR SLEEVE
FLEX
CONNECTOR
Fig 11
http://www.northlineexpress.com
COMBUSTIBLE
WALL
WALL PASS
THRU
7.
INSULATED FLEX LINER
FLEX
CONNECTOR
Fig 12
Toll-Free 1-866-667-8454
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