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B. Assemble Slip Sections
• Slide the inner flue of the slip section into the inner flue
of the pipe section and the outer flue of the slip section
over the outer flue of the pipe section. See Figure 7.5.
• Slide together to the desired length.
Figure 7.5 Slip Section Pilot Holes
• Maintain a 1-1/2 in. (38 mm) overlap between the slip
section and the pipe section.
• Secure the pipe and slip section with two screws no
longer than 1/2 in. (13 mm), using the pilot holes in the
slip section. See Figure 7.6.
Figure 7.6 Screws into Slip Section
• Continue adding pipe as necessary following instructions
in "Assembling Pipe Sections."
NOTICE: If slip section is too long, the inner and outer
flues of the slip section can be cut to the desired length.
NOTICE: When installing a vent system with an HRC
termination cap, all pipe system joints shall be sealed using
a silicone sealant with a minimum of 300 ºF continuous
exposure rating.
• Apply a bead of silicone sealant inside the female outer
pipe joint prior to joining sections.
• Only outer pipes are sealed, sealing the inner flue is not
required.
• All unit collar, pipe, slip section, elbow and cap outer
flues shall be sealed.
Heat & Glo • MEZZO36-B/ST-B, MEZZO48-B/ST-B, MEZZO60-B/ST-B, MEZZO72-B/ST-B Installation Manual • 2300-973 Rev. R • 12/18
38
Pilot hole
C. Secure The Vent Sections
• Vertical runs originating off the top of the appliance, with
no offsets, must be supported every 8 ft. (2.44 m) after
the maximum allowed 25 ft. (7.62 m) of unsupported rise.
• Vertical runs, after any elbow, must be supported every
5 ft. (1.52 m).
• Horizontal runs must be supported every 5 feet (1.52 m).
• Vent supports or plumbers strap (spaced 120º apart)
may be used to support. See figures 7.7 and 7.8.
• Wall shield firestops may be used to provide horizontal
support.
• Ceiling firestops have tabs that may be used to provide
vertical support.
WARNING! Risk of Fire, Explosion or Asphyxiation!
Improper support could allow vent to sag and separate.
Use vent run supports and connect vent sections per in-
stallation instructions. DO NOT allow vent to sag below
connection point to appliance.
Figure 7.7 Securing Vertical Pipe Sections
Figure 7.8 Securing Horizontal Pipe Sections
120º
120º
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