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Old 01-19-2016, 11:09 AM   #1
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2000 Keystone roof things

On top of my 2000 Keystone Montana there are a couple of small wind directional gadgets with propellers on them. I have no idea what they are. Any help? Thanks

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Old 01-19-2016, 01:00 PM   #2
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They are likely to suck the gasses out of the black tank(s) so that it keeps the smell down inside. I can remember the name of them but they sit atop the vent pipe for the wait tanks.

Montana Mountaineer 345DBQ
2016 Ford F-350 DRW -- Retired 2002 F-350 DRW
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Old 01-19-2016, 01:09 PM   #3
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Just a venturi cap for waste tank vent lines.

Air flows across front of cap and creates a negative pressure zone behind cap which draws air/gasses/odors out of waste tanks..venturi effect

Normal cap

Venturi cap

Solar cap......small fan inside

And then you have your homemade venturi effect cap.......1 1/2" PVC Tee
Course it doesn't rotate like the Cyclone Model

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