Lennox Hearth C42 - Manual (Page 16)

Female
Locking
Lugs
Sealant
Vent Considerations
Twist-lock procedure: Four indentations, located on the female ends
of pipes and fittings, are designed to slide straight onto the male ends of
adjacent pipes and fittings by orienting the four pipe indentations so they
match and slide into the four entry slots on the male ends (see Figure
17). Push the pipe sections completely together, then twist-lock one sec-
tion clockwise approximately one-quarter turn until the two sections are
fully locked. The female locking lugs will not be visible from the outside
on the pipe or fittings. They may be located by examining the inside of
the female ends.
Male
Locking
Lugs
Supports: Horizontal runs of vent must be supported every three feet.
Wall straps are available for this purpose.
Pipe Sealing: If Security™ Secure Vent™ pipe is used, then sealant is
required at only the first pipe joint attaching the pipe to the flue collar on
the fireplace. If Simpson Dura-Vent GS pipe is used, then the pipe must
be sealed as follows: seal both the inner and outer pipes with a high
temperature silicone sealant rated for at least 600º F (commonly known
as “RTV”). Run a 1/8” (3mm) bead of silicone around the outside of the
male end of the outer sleeve. Run a 1/8” (3mm) bead of silicone about
1/4” (6mm) from the end of the male inner pipe, which is found in the
pipe to be attached above. Twist-lock the pipes or fittings together.
Figure 17
16 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.