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Old 11-13-2012, 12:42 PM   #15
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1984 34.5' Airstream 345
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Pity I was not smart enough to press the Macro button on the camera!
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Old 11-13-2012, 12:51 PM   #16
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1981 31' Excella II
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Good job. I have not have time to do something like that but I have been thinking about it. I was thinking of an inverted Top hat sorta deal and bond that to the top of the square cone thing that way all the water would be on the outside of the cone or down the vent pipe. I think you got it covered.

Is there a way for water to get out of the vent if it gets trapped say while driving in a rain storm? That is about the only way water could get on the inside.

Perry
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Old 11-13-2012, 05:03 PM   #17
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Yes Perry,
On the lower side of the cap, there are two holes right behind the mounting screws..
In fact that was my original issue... some genius had filled them with caulk!
I got the dremmel on them, and opened them up on the inside to allow water to flow out right from the base. Kinda like a port and polish job!

You can just about make out the drain holes in this pic... in the screw recess, behind where the head of the screw will be eventually.
More visible on the unpolished vent..

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Old 11-13-2012, 05:09 PM   #18
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The only thing I would think about changing is make the leading edge come over the front to keep water out while driving. So if the front of your trailer is on the right of your last photo the hat would bend over and down over the front edge. I would take this apart in about 10 yrs and let us know if your rubber gasket is still good.

Perry
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Old 11-13-2012, 05:49 PM   #19
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Yes, that would be good.
The reason I did not do that was that the Aluminum I used is too thick to form into a compound curve.
Please remind me in 10 years and I will take a peak!
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Old 12-14-2012, 08:32 PM   #20
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This could be another viable option

http://www.airforums.com/forums/f455...ferrerid=55387

May be worth looking into if you don't want to make a topper for your stack, has a good vintage look.

I'll be using some tips from this post as I don't have the product I linked above. I have a leak and need to fix it now!! Just keeping this in mind if the gasket doesn't last long.
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Old 07-11-2015, 04:27 PM   #21
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Thread resurection ...

After time up top the other day I wondered about this.

One of my three vents has a hat, the others do not. A recent steady down pour only the one with a hat was no problem.

Not crazy about the original design with rubber that needs to be replaced or a hat to protect it.

After I make a couple more I'll post my version.
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Old 07-11-2015, 04:41 PM   #22
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Do it!
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Old 07-11-2015, 04:52 PM   #23
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When I did mine, I just caulked around the stack coming through the skin with Trempro-635. I did not use a gasket at all. It has not leaked in 3 yrs. I do like the top hat idea. Also there is a product called LEXEL that is better than the Urethanes as far as heat and UV related aging. This stuff stays gummy forever.

Perry
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Old 08-28-2017, 11:11 AM   #24
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Quick update:
5 years in and last week I pulled the cap and checked it... still prefect!
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Old 08-28-2017, 04:08 PM   #25
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Cool

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