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Old 05-01-2017, 12:42 PM   #1
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Some sort of exhaust pipe?

I'm going to reseal and re coat the roof and wanted to either bleach or replace the skylight cover and get the bugs, dust and ick from the exhaust fan first.
Just a matter of cutting away the previous silicone and caulk right?
Ok. Then a nasty storm throws more branches and crud up there after I had just trimmed a bunch off that I didn't like laying on it and scraping it and while up there, I notice these two "molehill" bulges, one with a pipe sticking up out of it and the other not.
I figure it got hit just right and knocked it straight down so am wondering if I need to retrieve it somehow or just fill in the hole and cover it up. It's next to the cover for the exhaust fan in the bathroom.
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Old 05-01-2017, 12:58 PM   #2
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that's a plumbing vent for all of your plumbing. You don't want to mess with it, just put a ventilated plumbing cap on it to keep the debris out of the pipe
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Old 05-01-2017, 01:08 PM   #3
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Quote:
Originally Posted by mmartin View Post
that's a plumbing vent for all of your plumbing. You don't want to mess with it, just put a ventilated plumbing cap on it to keep the debris out of the pipe
Put a cap on which one please?
Cover? Screen material and plenty of caulk all around sufficient?
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Old 05-01-2017, 01:41 PM   #4
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The pipe in the picture is like said a vent for your plumbing. It is the same as you will find on your sticks and bricks. Most rv's I have seen come with a cover that fits on top unlike the ones on the house. You don't want to block it because if you do it will affect how your plumbing drains etc.
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Old 05-01-2017, 02:42 PM   #5
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It looks like someone "modified" your vents with lots of caulk after losing the caps. If you want to know how these vents would be fixed properly, please watch this video:
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Old 05-02-2017, 09:00 AM   #6
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Someone.....yeah.
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Old 05-02-2017, 02:22 PM   #7
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Quote:
Originally Posted by 6x16inside View Post
Put a cap on which one please?
Cover? Screen material and plenty of caulk all around sufficient?
I would recommend the RV360 vent cover. It is a great design that will reduce positive pressure in the waste tank and the odors that go with that condition.

https://360productsnorthamerica.com/site/
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Old 05-02-2017, 02:51 PM   #8
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I would recommend the RV360 vent cover. It is a great design that will reduce positive pressure in the waste tank and the odors that go with that condition.

https://360productsnorthamerica.com/site/
Expensive and not really needed if the system is working correctly.
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Old 05-02-2017, 03:46 PM   #9
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Rv waste tanks have 'vents' that go up thru roof

Should be one for Black tank
Should be one for Grey tank


You stated:
I notice these two "molehill" bulges, one with a pipe sticking up out of it and the other not.
I figure it got hit just right and knocked it straight down so am wondering if I need to retrieve it somehow or just fill in the hole and cover it up.

The one sticking up thru roof.............
That one NEEDS a vent cap

the one that is no longer sticking up thru roof.......
You NEED to get a grip on it (pliers, vise grips on sidewall OR your hand if possible) and PULL it back up thru roof. Then secure it so it doesn't get pushed back on into tank (Normally the 'rubber grommet' on tank would hold it in place but with age the grommet will deteriorate/loose friction grip)
At first do NOT pull it up TOO far (Just couple inches -----don't want to pull it completely out of tank/grommet as that will cause you MORE issues)
It will then NEED a vent cap and re-caulking job around roof area.

2 vents pipes...one is missing
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