DuraVent PolyPro Flex User Manual
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A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES)
TO COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST
IMPORTANCE THAT POLYPRO
®
BE INSTALLED ONLY IN
ACCORDANCE WITH THESE INSTRUCTIONS.
Dear Customer, Installer, or End User:
We welcome any comments regarding
matters pertaining to our DuraVent products.
We welcome any ideas, input or complaints
to help improve our product offering. Send
your emails to:
If you are searching for tech support or
product information, please phone us at
800-835-4429.
Or email us at:
•
Examine all components for possible 
shipping damage prior to installation;
•
Read all instructions before beginning 
the installation and follow these 
instructions exactly as written.
•
Proper joint assembly is essential for a 
safe installation. Check the integrity of 
ALL joints upon completion of assembly
•
This venting system must be free to 
expand and contract under normal 
operation.
WarnIng
risk of carbon monoxide poisoning
or fire due to joint separation or pipe
breakage.
Keep these instructions for future
reference.
PolyPro® is one of M&G DuraVent's
GreenVent® line of products.
Indicates a condition or hazard which
will or can cause minor personal injury
or property damage.
CautIon
Important
throughout this manual you will see
special attention boxes intended to
supplement the instructions and make
special notice of potential hazards.
In the judgement of m&g DuraVent,
these categories mean:
WarnIng
Indicates a condition or hazard which
may cause severe personal injury, death
or major property damage.
•
Assure unrestricted vent movement 
where required through walls, ceilings 
and roof penetrations.
•
This venting system must be supported 
in accordance with these instructions.
•
Do not mix pipe, fittings, or joining 
methods from different vent system 
manufacturers. Do not use adhesives of 
any kind with this venting system.
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