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USE OF COUPLERS – WITH FLEX PIPE
In the event of a puncture of the vent pipe or if an extension is needed couplers may be used. High
temperature sealant shall be applied to the ends of the coupler and then the coupler shall then be
inserted into the flex vent. Use 3 #8 x ½" hex head sheet metal screws on each end of the joint to
fasten the coupler to the venting.
USE OF SEALANT
Sealant is required on vent system joints. On longer vent runs, especially vertical runs, sealant will
ensure that the combustion air enters from outdoors, and not through the vent joints. Use high
temperature sealant, available from local suppliers, on the inner pipe joint, applying the sealant
around the outside of the male part of the vent. A bead of silicone should be used on the outside of
the joint after assembly to seal the supply air. If the venting is disconnected for servicing, be sure to
follow above instructions for resealing venting when reconnecting to system.
VENT RESTRICTOR INSTALLATION
VENT RESTRICTOR
To fasten the Restrictor Plate to the ceiling of the firebox:
1/. Remove the 2 screws that are in place
2/. Align holes in the Restrictor that match the required degree of restriction
3/. Fasten Restrictor Plate back in place.
Figure 6
Vent Configuration Restrictor Size
30 +
20 – 29
11 – 19
75%
50%
25%
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