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3) Joining Pipe -
a) Start assembly of the vent system at the boiler. Lubricate the brown gasket in the boiler vent collar with a few drops
of water.
b) Push the male end of the first fitting into the boiler collar until it bottoms out. The male end of cuttable sections
should go 1” into the collar until the insertion mark (made in Step 2d above) is covered. On other fittings, the bead
on the male pipe will be bottom out on the collar (Figure 32).
c) The male end of cuttable fittings must be held to the collar with three #10 x 1/2” sheet metal screws. Drill a 1/8 hole
through both outer pipes to start this screw. Use a drill stop or other means to ensure that the drill bit does not
penetrate more than 3/8” into the outer pipe. Do not use a sheet metal screw longer than 1/2” (Figure 7.32a).
d) Use locking bands (provided with all fittings) to secure non-cuttable pipe, as well as fittings, to the boiler collar
(Figure 7.32b).
e) Use the same method to join all remaining vent components except for the terminal.
FIGURE 7.32a: JOINING CUTTABLE PIPE
FIGURE 7.32b: JOINING NON CUTTABLE PIPE
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