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Old 04-26-2021, 06:26 PM   #1
dallasrules
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What is this on the roof

I have 2 of these vent things on the roof and the covers are cracked off. I think the covers screw down into the center. I need to know what they are so I can get replacements. 2003 montana 5th wheel. I think it's a 3655 FL or something like that.
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Old 04-26-2021, 06:31 PM   #2
dhuhn
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Those are roof vents there one in front and back on roof . This is a replacement on Amazon
https://www.amazon.com/JR-Products-0...s%2C223&sr=8-5
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Old 04-26-2021, 06:49 PM   #3
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Do I need to replace the whole vent?
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Old 04-26-2021, 06:57 PM   #4
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No i just replaced the tops
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Old 04-26-2021, 06:59 PM   #5
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The top just screws off
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Old 04-26-2021, 07:39 PM   #6
dallasrules
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Thanks everyone. I will get them ordered.
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Old 04-27-2021, 05:43 AM   #7
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If your unit isn't under cover I'd secure a plastic bag over them until the new ones come in or you're going to have water in the attic.
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Old 04-27-2021, 07:33 AM   #8
dallasrules
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Thanks, we covered them. That's how we discovered the problem. We had a leak from a light fixture in the last rain storm.
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Old 04-27-2021, 08:00 AM   #9
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Aren't those his holding tank vents?
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Old 04-27-2021, 09:11 AM   #10
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No the holding tank vents are smaller they are usually black on newer rigs
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Old 05-05-2021, 04:46 PM   #11
Marc Daigle
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Mushroom Vent Cap

BJs has them a for a little less. Cap only. The shipping was a little high.
https://www.rvandmarine.com/product/...vent-cap-only/
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Old 05-05-2021, 05:37 PM   #12
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Those two are normally covered with a "mushroom cap" cover. The purpose of the two vents is to create an air flow in the attic, between the roof decking and insulation on the ceiling. When I replaced mine, I used a bit of liquid thread lock to keep them in place, as they do rotate quite easily.
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