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Old 06-24-2018, 10:04 PM   #1
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THOR #11392
Black tank vent

Thor Challenger 37GT
I want to install a new vent cap on the black tank vent but there are 3 vents on the roof. Anyone know which is the black tank??
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Old 06-24-2018, 10:49 PM   #2
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THOR #2953
The vent near the middle of the roof (farthest forward) is actually a place to connect a satellite dish. In it is a membrane you can cut through to get to the wiring for the satellite. The two vents near the back of the coach are the gray and black tank vents. I am not sure which one is the black but I think it is the one closest to the rear of the coach.
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Old 06-24-2018, 10:59 PM   #3
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THOR #4656
Use your nose. It will tell you.
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Old 06-24-2018, 11:01 PM   #4
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If you're changing one: you might as well change them both!
We're just looking for a gap in the weather, and we'll be installing a pair of the Cyclone vents up on top of ours...
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Old 06-24-2018, 11:15 PM   #5
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THOR #2953
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Originally Posted by Bob Denman View Post
If you're changing one: you might as well change them both!
We're just looking for a gap in the weather, and we'll be installing a pair of the Cyclone vents up on top of ours...
Ditto on the cyclone vents and replacing them both.
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Old 06-24-2018, 11:23 PM   #6
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THOR #8860
We were planning to get one in black (Blackwater), and the other in white (Graywater); but I messed up the order!
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Old 06-25-2018, 12:50 AM   #7
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THOR #5196
This is the vent you want, no moving parts and work with the slightest breeze.

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Old 06-25-2018, 02:24 AM   #8
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THOR #5326
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This is the vent you want, no moving parts and work with the slightest breeze.

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they are the best
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Old 06-25-2018, 01:15 PM   #9
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We looked at them, and were pretty impressed!
I think that I was a little bit concerned about that "water dish" top: is there actually any way for water to collect in it, and end up getting down the vent pipe?
(I'm probably just worrying a whole bunch: about a real big nothing!)
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Old 06-25-2018, 01:46 PM   #10
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Originally Posted by Bob Denman View Post
We looked at them, and were pretty impressed!
I think that I was a little bit concerned about that "water dish" top: is there actually any way for water to collect in it, and end up getting down the vent pipe?
(I'm probably just worrying a whole bunch: about a real big nothing!)
The top of the vent may collect a little water but it canít get into the vent pipe. There is an older model still available that has a slight dome on top, I actually have one of each, one on black and one on gray tank. Both vents work great and are fairly easy to install. Easiest way to trim the vent pipe to length is a pvc pipe cutter, be sure to have a tube of Dicor too.
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Old 06-25-2018, 01:48 PM   #11
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Thanks!
The "Insurance Guy" inside me: worries too much!
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Old 06-25-2018, 02:18 PM   #12
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Quote:
Originally Posted by Bob Denman View Post
We looked at them, and were pretty impressed!
I think that I was a little bit concerned about that "water dish" top: is there actually any way for water to collect in it, and end up getting down the vent pipe?
(I'm probably just worrying a whole bunch: about a real big nothing!)
Not sure it matters if a bit of water gets in as the vent pipe goes directly into the black tank.
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Old 06-25-2018, 02:25 PM   #13
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Good point!

...And one that I hadn't even considered...
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Old 06-25-2018, 05:31 PM   #14
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Originally Posted by Bob Denman View Post
Good point!

...And one that I hadn't even considered...
x2, what little water you MIGHT get wonít hurt a thing.
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Old 06-25-2018, 05:53 PM   #15
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Point well taken, and I've learned something useful today:
"Pay attention to the entire picture!"
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