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If additional pieces of pipe are used, install them starting at the boiler elbow. Support each section of straight pipe 4)
at its female end.
Use locking bands provided to join adjacent sections of non-cuttable pipe as well as fi ttings. The male end of the 5)
terminal section and other cuttable sections must be held to the female end of the adjoining pipe with at least
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”.
The only straight pipe that can be cut is the terminal section and the 19-1/2” section (Crown PN 230506). To cut 6)
this pipe:
Cut pipe from the male end. After marking the desired length of the outer pipe, remove the plastic inner pipe a)
by pulling it out from the female end.
Cut the b) outer pipe only at the point marked in Step (b) using aviation shears, a hacksaw, or an abrasive
wheel cutter. Be careful to cut the pipe square. De burr the cut end with a fi le or emery cloth.
Cut the plastic inner pipe so that it will protrude 3/8” beyond the outer pipe when reinstalled in the outer pipe. c)
Use a fi ne tooth hacksaw or a PVC saw to cut the plastic pipe and be careful to cut the pipe square. De burr
the cut edge of the plastic pipe with a fi le, razor blade, or fi ne sandpaper.
Reinstall the inner pipe.d)
Install the terminal as outlined in Step (4) above. Dimension “L” described in Step 3 is the distance from the 7)
exterior surface of the wall to the end of the last piece of pipe inside the building.
Figure 7.22: Cutting Outer Pipe
Figure 7.23: Cutting Inner Pipe