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Old 11-07-2015, 07:18 PM   #1
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Vent tubes on new Silverback

I purchased one of those aerodynamic vent covers for the black tank vent tube. I now notice on my roof there are two vent tubes next to each other above the bathroom. Why two? Which one do i replace the cap?
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Old 11-08-2015, 10:50 AM   #2
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One might be an attic vent, I think my Cardinal has four as well as the tank vents.


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Old 11-08-2015, 11:43 AM   #3
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One for black tank ... one for grey tank? Should be a third for galley. The attic vents are shorter and have a flatter cover.
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Old 11-08-2015, 05:50 PM   #4
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You should have 2 mushroom vents that are attic only and one black tank vent on the roof. Your vents for the grey tanks are not on the roof. They are one way plumning vents in the basement.
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Old 11-08-2015, 06:46 PM   #5
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Thanks for the info. Now I have to determine which one is black and which one is attic. I don't think I need the aero cp for the attic.
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Old 11-08-2015, 07:04 PM   #6
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You don't NEED a cover for any of them
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Old 11-08-2015, 07:15 PM   #7
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I canít help you Ted, but this is what my roof looks like. The two attic vents are directly behind the air conditioning units. The red lines point to the holding tank vents but I have no idea which goes to where. Here the picture of my roof.

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Old 11-08-2015, 07:20 PM   #8
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Yeah ... what Bob said with photos except my attic vents are forward of the A/C's. 2016 33IK. My grey tanks are roof vented despite a previous reply.
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Old 11-09-2015, 02:20 PM   #9
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Turn on the black tank flush and you should be able to hear which one is the black tank vent Just don't have fanatic fans running with windows closed when you flush
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Old 11-09-2015, 07:55 PM   #10
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Quote:
Originally Posted by rugersdad View Post
One might be an attic vent, I think my Cardinal has four as well as the tank vents.


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Never heard of an attic vent...What do they do? Don't say vent from atic!!! Where is attic....dumb question?????????
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