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6.7 Twin Pipe Spring Clamp Instructions - See Figure 6-4
Manufacturer recommends use of a mechanical fastener at
every push-fit gasket connection when using a polypropylene
vent. Follow vent manufacturer instructions or, if unavailable,
below when installing a mechanical fastener:
•
Take dual flue mechanical fastener with larger hole in it and
place it onto male end of pipe.
• Slide clamp all the way down the pipe with smaller opening
of clamp towards female end of the pipe.
•
Bend clamp over the female end of pipe "A" and slide male
end of pipe "B" through clamp and into female end of pipe
"A".
Note
Mechanical fastener is necessary for dual flue pipe.
Dual flue mechanical fastener is for indoor use only
and should not be used in outdoor applications.
FIGURE 6-4 - Mechanical Fastener for Twin Pipe
6 - COMBUSTION AIR AND VENT PIPING
WARNING
Asphyxiation hazard! Improper installation could
result in death or serious injury. Read Twin Pipe
Installation Instructions completely and understand
all requirements before beginning installation.
!
6.6 Twin Pipe Polypropylene and CPVC Systems
Twin pipe venting allows exhaust flue and intake flue to be
separated from each other. Fresh air is drawn in at a different
area from the flue terminal location.
A. Twin Pipe Polypropylene System
Single wall polypropylene is used for both exhaust and air
intake piping.
To transition from Coaxial at the top of the boiler to Twin Pipe
polypropylene venting an adapter kit is available. Figure 6-5.
B. Twin Pipe Separated Flue
Exhaust and combustion air
intake are not located in same general location. Figure 6-6.
C. Twin Pipe - Common Atmospheric Zone Termination
Exhaust and combustion air intake are located in same general
location and are of equal length. See Figures 6-7 to 6-9.
PN 240011662 Rev. H [04/30/2019]
