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Vitodens Rigid and Flex Venting Systems Installation
Direct Venting (Two-pipe System)
Vent Length Requirements
(continued)
Standard long sweep elbows (for CPVC / PVC / ABS pipes air intake use only)
Note:
If standard sweep elbows are used the allowable
vent lengths are reduced.
One standard 90° elbow is equivalent to 8 ft.
(2.4 m) of straight pipe.
Standard long sweep elbows
Material
90° elbow
equivalent length
45° elbow
equivalent length
87° elbow /
87° inspection tee
CPVC plastic pipe
5 ft. (1.52 m)
3 ft. (0.91 m)
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PP(s) flexible pipe system
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1 ft. (0.3 m)
1.6 ft. (0.5 m)
For Plastic pipe only
90° long sweep elbow
equivalent to 5 ft. (1.5 m)
90° short sweep elbow
equivalent to 8 ft. (2.4 m) if used