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Old 12-28-2008, 03:53 PM   #1
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Flexible vent pipes?


I'm in the process of installing 'can'/recessed lights in my kitchen. I cut a hole for one of the csans and found a vent pipe directly above the hole.

Can I cut the vent pipe and add a flexible pipe/hose to get around the can?

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Old 12-28-2008, 06:32 PM   #2
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Flexible vent pipes?


If it is a sewer vent you will need to reroute it with pvc. No flex pipe.

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Old 12-28-2008, 07:36 PM   #3
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Flexible vent pipes?


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Originally Posted by TazinCR View Post
If it is a sewer vent you will need to reroute it with pvc. No flex pipe.
It appears to be a kitchen sink drain vent - it this considered a 'sewer' vent?
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Old 12-28-2008, 10:07 PM   #4
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Flexible vent pipes?


Yes and you should be able to reroute it with pvc.
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Old 12-28-2008, 11:49 PM   #5
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Flexible vent pipes?


It would have to be re-routed with PVC. There are no flexible options unfortunately.
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Old 12-29-2008, 06:02 AM   #6
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Flexible vent pipes?


Although there is 1-1/2", 2" and even 3" flexible PVC out there, it isnt approved for drain, waste and venting. Some 45s, a little bit of pipe and time though and you'll be home free.
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Old 12-29-2008, 07:40 AM   #7
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Flexible vent pipes?


Before you tear down the ceiling to re route, if you're lucky you may be able to offset up diagonally or sideways a few inches by using a couple of 45 degree elbows with a 2-6" stub between them. Don't try to swivel or push your pipe sideways since you may crack a hidden joint down line and cause more work for yourself. Also remember to keep your pvc away from the future heat of your light pots.
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Old 12-29-2008, 08:55 AM   #8
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Flexible vent pipes?


There is no clearance requirement between DWV pipe and can lights, but it would be a good idea to maintain a little space for good measure.

Also, when you re-plumb, don't accidentally create a point to prevent water from passing or a point of accumulation. Any new plumbing should be level with the pipe's flow.

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