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Old 04-05-2020, 06:23 PM   #1
Join Date: Feb 2020
Posts: 33
Vent cap and sealing roof

So we've had our RV now for just over a month and took it out today just so the motor could run. Well, apparently the cap to the pipe on the non stove/fridge side came off in the wind and is now just a pipe down into the RV. I obviously need to replace it but won't be able to get the parts for a few days. While up there I noticed some seals had cracks, along with the fridge vent cover has a crack in it.

1) should I worry about water getting down the pipe? I think it's the grey/black water vent? We put the water resistant cover over the RV but we are supposed to get alot of rain the next four days.

2) how hard is it to replace the domestic vent cover?

3) Ang tips to sealing the whole roof? I plan on while im at this just making sure everything in the roof is redone and sealed.

4) any idea what brand plumbing vent cover this is so I can replace with the same thing?
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Old 04-06-2020, 10:09 AM   #2
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National RV Owners Club
Freightliner Owners Club
Join Date: Jul 2015
Location: Conch Republic
Posts: 2,224
All business as usual with an RV. Tank vent: There are a number of places that make these. It is possible that you can get an identical one and just snap the new cap on but I would replace the entire vent. Camco makes em. Any RV place or website has them. Dig out the old caulk being real careful not to damage the roof. aunscrew the old, install the new and recaulk. I use Dicor self leveling caulk but there are other brands that self level.

Fridge vent:

You may want to replace the vent cover. Check the model of the fridge and get a new one same kind. If it is OK otherwise then spray paint it to slow down UV damage and caulk the crack. Same caulk. I'd replace it because it will be brittle.

Roof in general:
Wash it with a soft brush and mild detergent. Let dry for a day. remove all loose caulk or heavy build up of old caulk and apply self leveling caulk liberally wherever there are cracks in the old caulk or seams.

Just for fun look up Eternabond tape.
33' 2008 National Tropical on a Freightliner chassis.RVM#189
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Old 04-06-2020, 12:36 PM   #3
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Holiday Rambler Owners Club
Join Date: Aug 2010
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Little bit of rain going down your vent stack won't hurt anything. It's just going into either your black, or grey tank.
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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Old 04-07-2020, 09:36 PM   #4
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Location: Naples, FL
Posts: 952
Seriously, look up Eternabond tape. A little pricey but worth every penny. Did all my roof seams with it 4 yrs ago and it still is stuck fast and keeping water out. Makes for a neat job too.
Stan & Jacquie
2007 Monaco Knight DFT 40', 750 watts Solar
2012 Equinox w/Air Force I, Blue Ox Alpha & Base.
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vent, roof, seal

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