27
IV. Venting C. Polypropylene Venting (continued)
When using exible polypropylene vent pipe (liner):
• Flexible pipe must be treated carefully and stored at
temperatures higher than 41°F (5°C).
• Do not bend or attempt to install exible pipe if
it has been stored at lower ambient temperature
without allowing the pipe to warm up to a higher
temperature rst.
CAUTION
Bending or attempting to install exible pipe if it
has been stored at ambient temperature below
41°F (5°C) will cause material to become brittle
and lead to cracks.
When exible polypropylene pipe (liner) is
used for combustion product venting, it must
not be installed at an angle greater than 45
degrees from vertical plane. This will insure
proper condensate ow back towards the boiler.
CAUTION
Do not install exible polypropylene pipe at an
angle greater than 45 degrees from vertical plane
when used for combustion product venting.
Failure to do so will result in improper condensate
drainage towards the boiler and possible
subsequent vent pipe blockage.
• When exible polypropylene pipe (liner) is used
for combustion air supply to a boiler, the pipe
(liner) can be installed in vertical or horizontal
position.
• Follow flexible polypropylene pipe (liner)
manufacturer specic installation instructions
regarding application/listing, permits, minimum
clearances to combustibles; installation details
(proper joint assembly, pipe support and routing,
gasket and tting installation, optional tooling
availability/usage, routing thru masonry chimney
for combustion product venting or, combination
of combustion product venting and combustion
air supply).
• When there is a conflict between flexible
polypropylene pipe (liner) manufacturer installation
instructions and Apex boiler Installation, Operating
and Service Instructions, the more restrictive
instructions shall govern.
Apex Boiler Two-Pipe Vent System Connector Field
Modication Procedure To Accept Polypropylene
Vent Piping:
Apex boilers are factory supplied with a model-specic
boiler two-pipe CPVC/PVC vent system connector
shipped within a model-specic boiler CPVC gasketed
vent kit carton.
Locate and remove a model-specic boiler two-pipe
CPVC/PVC vent system connector.
When using M&G/DuraVent polypropylene pipe for
combustion product venting and/or air supply, male
PVC to PP boiler adapter (4PPS-04PVCM-4PPF or
6PPS-06PVCM-6PPF as applicable) is installed into the
two-pipe vent system connector vent or combustion air
supply port as follows (see Figure 14):
1) APX399 and APX500 models - Apply provided
dielectric grease (grease pouch taped to the vent
system connector) all around to the vent or air
connection inner red silicon gasket.
2) APX399 and APX500 models - Push and twist
PVC to PP boiler adapter (4PPS-04PVCM-4PPF)
into two-pipe vent system connector vent connection
or air supply port until bottomed out.
Boiler
Model
M&G / DuraVent Part Numbers/Sizes
Male Boiler Adapter,
PVC to PP
Rigid Pipe Flex Pipe
Pipe Joint
Locking Band
Side Wall
Termination Tee
Chimney Kit for
Venting Only
APX399
4PPS-04PVCM-4PPF 100 mm 100 mm 43PPS-LB 43PPS-TB 4PPS-FK
APX500
APX800 6PPS-06PVCM-6PPF 150 mm N/A 6PPS-LBC 6PPS-E90B N/A
Table 9: Approved Polypropylene Pipe, Fittings and Terminations - M&G/DuraVent
Boiler
Model
Centrotherm Eco Part Numbers/Sizes
Male Boiler Adapter,
PVC to PP
Rigid Pipe Flex Pipe
Pipe Joint
Locking Band
Side Wall
Termination Tee
Chimney Kit for
Venting Only
APX399
ISAA0404
ISSAL0404
110 mm 110 mm IANS04 ISTT0420
IFCK0425
and
IFCK0435
APX500
APX800
ISAA0606
ISSAL0606
160 mm N/A IANS06 ISTT0620 N/A
Table 10: Approved Polypropylene Pipe, Fittings and Terminations - Centrotherm Eco
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