FLEX VENT INSTALLATION
3.Do not allow the flexible vent to bend in radius tighter than 5" (127mm). Refer to Figure 2.
4.Horizontal runs of flexible vent shall be supported at maximum 2 foot intervals; vertical runs, five feet intervals. Metal strapping, properly secured, is an acceptable means to support the flexible vent.
5.Flexible vent spacers are to be installed at intervals prescribed by the flexible vent manufacture; and in such a way as to maintain concentric inner and outer vent spacing.
D.Attaching flexible venting to vertical termination assemblies.
1.When using Simpson pipe, a MHS
2.Review Figure 4 and corresponding instructions for proper overlap, clamp and screw placement.
3.Three each self penetrating screws are drilled opposite one another and below the gear clamp.
4.Use only listed and approved terminations and accessories, installed per the installation instructions and Figure 3.
E.Installing flexible venting to horizontal termination assemblies.
1.Connect the 4" flexible vent to the horizontal termination as in Figure 5.
2.Slide termination cap adapter ring over the termination cap’s outside pipe and secure with three screws.
3.Connect the 7" flexible vent to the termination adapter ring as in Figure 5.
4.Review Figure 5 for proper overlap and clamp placement
5.Three each self penetrating screws are drilled opposite one another and below the gear clamp.
6.Use only listed and approved terminations and accessories, installed per the termination instructions and Figure 5.
| Termination |
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| Rigid pipe |
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| length | |
| cap |
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| |
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| Flex to pipe | |
Flashing |
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| |
Storm collar | Securing |
| adapter | |
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| |||
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| screws |
| (FPA/8) |
|
| (3 places | Gear | 1¾ in. flexible pipe |
Rigid pipe | Roof support | equidistant | clamp | and adapter outer |
just above |
| collar overlap | ||
length |
| gear clamp) |
|
|
Flex to pipe |
|
|
| Gear clamp |
adapter |
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| |
|
|
| UL1777 | |
(FPA/8) |
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| |
|
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| Flex vent |
|
| Figure 4 — Typical pipe connection | |
UL1777 flex pipe |
|
| Monessen horizontal |
|
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| |
Fire stop |
|
| vent termination |
DVFA/8 Adapter |
| Termination to flex |
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| Securing screws | adapter (FTA7/8) |
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|
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| |
| (three places |
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| equidistant, just |
|
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| above gear clamp) |
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| UL1777 | Gear | 1¾ in. flexible pipe |
| Flex vent | and termination outer | |
|
| clamps | collar overlap |
Figure 3 — |
| Figure 5 — |
|
Typical vertical flex vent installation | Typical horizontal flex vent installation | ||
54D5031 | 27 |