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Old 10-08-2016, 12:40 PM   #1
Ree
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Join Date: Jun 2016
Location: Central Florida
Posts: 35
V-Lite black water tank vents

This is our discovery, if anyone is having the same problem. We kept adding chemicals and that did not help! Here is our solutions


HOLDING TANK ODOR IN TRAILER
(with ample black water chemicals)

Camping in Florida's 90 degree weather brings out odors. We noticed a strong odor in the bathroom after three days on our V-Lite with a front bathroom. Following my nose it was a weak odor in the bedroom and stronger in the bathroom. Opening the sink cabinet almost knocked me out. The odor was strongest on the left side where the sink drain runs through the wall in a hole 50% larger than the pipe.

Turning on the bathroom fan seemed to clear the odor in the bathroom but it got stronger in the bedroom. I suspected the sewer holding tank vent was cracked or the seal was defective. From the outside, I noticed the vent pipe runs up the bedroom wall and through the roof, RIGHT IN FRONT OF THE VENT FAN!

Back home, I took the bedroom wall down and found the hole through the roof and floor 50% larger than the pipe and no sealer. We drained the holding tanks before leaving the campground. At home, we over-filled the tank to make sure the vent pipe seal on the tank was OK. It was fine. Moving to the roof, I dug out the caulking on the vent pipe cap screw. Removing the screw and pulling the cap off exposed the source of the odor. The vent pipe was cut short and was below the roof cap top ring where it is supposed to seal around the pipe. So the STINK goes up the pipe and fills the roof cap and then down into the bedroom/bathroom wall and follows the drain pipe to the bathroom cabinet.

Whoever installed the roof cap knew the pipe was short and would not seal against the pipe. The cap was not even centered on the vent pipe. I checked the other two vent caps. The kitchen galley tank vent cap was OK but the shower waste water cap was the same as the sewer cap, short cut and off center. And why would anybody place a sewer vent right in front of a vent fan?

SOLUTIONS: The vent/drain holes through the roof, floor and walls were all sealed with spray foam. The gap around the roof cap and the vent pipe was filled with foam to overflowing and the vent hole inside the pipe was cut out with a knife. The cap was replaced and the screw caulked up.

For most owners with this problem, fixing the roof vent cap seal around the vent pipe will take care of it.

For Florida hot weather now using only
Thetford Aqua-Kem

Hope this is helpful to someone!

__________________
2014 35 V-Lite 30WIKSS Platinum
Expedition 5.4, Hankook, Reese 1200 Round Bar, Trans-Go, Hadden, Curt Tri-Flex, 3.73 Posi-Traction
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Expedition 5.4, Hankook, Reese 1200 Round Bar, Trans-Go, Hadden, Curt Tri-Flex, 3.73 Posi-Traction
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Old 10-08-2016, 02:10 PM   #2
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Great job identifying the problem and finding the solution.
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Old 10-08-2016, 08:34 PM   #3
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Location: Homosassa Florida
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I had to cut off vent pipes, they sealed to caps and stopped venting. Never had them to short. This v cross shower drain leaked flooded under belly, stunk up trailer for months til I got it washed out good enough and dried out. Don't mean to steal post just add to things to check out.
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Old 10-09-2016, 08:45 PM   #4
Ree
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Quote:
Originally Posted by bowebow View Post
I had to cut off vent pipes, they sealed to caps and stopped venting. Never had them to short. This v cross shower drain leaked flooded under belly, stunk up trailer for months til I got it washed out good enough and dried out. Don't mean to steal post just add to things to check out.
Thank you for your input!
We all need all the trouble shooting ideas we can get. You did not steal the post at all. We all need to stick together with our ideas and solutions. My "nose" thanks you! The odors are not healthy and many don't realize the odor is obnoxious, but also unhealthy!

I wondered and can not find a V-Lite forum. If there is one please let me know.

I was thinking that no matter what the model of your travel trailer, the problems could all be the same. Maybe built a little different in some ways, but for the most part the same.

A Hurricane Michael survivor here!
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Old 10-09-2016, 09:04 PM   #5
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I check flagstaff and Rockwood, looking for other v trailer info. V lite, windjammer made in same factory. Engineer who showed us around was very proud of their product. V cross built at a different place.
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Old 10-11-2016, 04:44 PM   #6
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We have a V-Lite with the exact same experience. Live in Texas, and the smell is strongest in our front bedroom. Lately we've just been keeping the black tank clean all the time, with Pinesol in it when not being used.
I suppose I need to head up on the roof and follow your lead. Wouldn't surprise me at all if it's the exact same issue.
Thanks!
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Old 10-12-2016, 10:48 AM   #7
Ree
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Proper Sealer

Quote:
Originally Posted by jgriffin7 View Post
We have a V-Lite with the exact same experience. Live in Texas, and the smell is strongest in our front bedroom. Lately we've just been keeping the black tank clean all the time, with Pinesol in it when not being used.
I suppose I need to head up on the roof and follow your lead. Wouldn't surprise me at all if it's the exact same issue.
Thanks!
Our purpose for posting our solution was to help others trouble shoot their problems, we all have problems. We are please that this may help you find a solution. Please let us know what you find.

Do you have the same model as we do? 30 WIKSS

Another important issue here is the sealer to use to seal up you work on the roof especially. This is what we found from the advice of an RV repairman and the factory. DO NOT USE SILICONE SEALER

WHAT TO USE TO SEAL YOUR UNIT.

The proper sealer is necessary for a good seal that last. Almost all doors, windows, trim, hatches and accessory covers on RV's are sealed with a polyurethane sealer that really sticks, firms up well and remains flexible.

Roofs are sealed around vents, hatches, AC units and edge seams with a product called Lap Seal. This is thicker, very sticky and usually is used to overlap the spot being sealed by 1.5 Inches. It comes in Self Leveling and Non Sag formulas in a caulking tube.

The best Polyurethane sealer I've found is LOCTITE TUB & TILE SEAL & BOND, aka POLYSEAMSEAL. It's easy to lay a good looking bead and to smooth with a wet finger where necessary.
I found it at home centers in both White and Almond. This also works good on the interior around sinks, showers and counters.

For the Lap Seal roof product, I found it at MOBILE HOME DEPOT [www.mobilehomedepot.net]. I purchased Non Sag formula and it works great. No leaks with this stuff.

Can also be found on Amazon if you do not have an immediate need!
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Expedition 5.4, Hankook, Reese 1200 Round Bar, Trans-Go, Hadden, Curt Tri-Flex, 3.73 Posi-Traction
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Old 10-12-2016, 12:24 PM   #8
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I very much appreciate you posting. Yes, helping others trouble shoot is wonderful!

We have a 30WRLIKSS. It's similar to yours, except our bathroom and bedroom is swapped. The V nose is our closet. But I'm sure the piping is very similar.

I'll take your advice on the sealer. I've been on the roof but never had a need to pull a vent cap on any rig I've owned. So that will be a new experience. I appreciate your description of the problem, but I'm guessing I'll understand it better once I get up there and see for myself.
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Old 10-12-2016, 03:19 PM   #9
Ree
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Join Date: Jun 2016
Location: Central Florida
Posts: 35
[QUOTE=Ree;1336487]This is our discovery, if anyone is having the same problem. We kept adding chemicals and that did not help! Here is our solutions

Drawing below


HOLDING TANK ODOR IN TRAILER
(with ample black water chemicals)

Camping in Florida's 90 degree weather brings out odors. We noticed a strong odor in the bathroom after three days on our V-Lite with a front bathroom. Following my nose it was a weak odor in the bedroom and stronger in the bathroom. Opening the sink cabinet almost knocked me out. The odor was strongest on the left side where the sink drain runs through the wall in a hole 50% larger than the pipe.

Turning on the bathroom fan seemed to clear the odor in the bathroom but it got stronger in the bedroom. I suspected the sewer holding tank vent was cracked or the seal was defective. From the outside, I noticed the vent pipe runs up the bedroom wall and through the roof, RIGHT IN FRONT OF THE VENT FAN!

Back home, I took the bedroom wall down and found the hole through the roof and floor 50% larger than the pipe and no sealer. We drained the holding tanks before leaving the campground. At home, we over-filled the tank to make sure the vent pipe seal on the tank was OK. It was fine. Moving to the roof, I dug out the caulking on the vent pipe cap screw. Removing the screw and pulling the cap off exposed the source of the odor. The vent pipe was cut short and was below the roof cap top ring where it is supposed to seal around the pipe. So the STINK goes up the pipe and fills the roof cap and then down into the bedroom/bathroom wall and follows the drain pipe to the bathroom cabinet.

Whoever installed the roof cap knew the pipe was short and would not seal against the pipe. The cap was not even centered on the vent pipe. I checked the other two vent caps. The kitchen galley tank vent cap was OK but the shower waste water cap was the same as the sewer cap, short cut and off center. And why would anybody place a sewer vent right in front of a vent fan?

SOLUTIONS: The vent/drain holes through the roof, floor and walls were all sealed with spray foam. The gap around the roof cap and the vent pipe was filled with foam to overflowing and the vent hole inside the pipe was cut out with a knife. The cap was replaced and the screw caulked up.

For most owners with this problem, fixing the roof vent cap seal around the vent pipe will take care of it.

For Florida hot weather now using only
Thetford Aqua-Kem

Hope this is helpful to someone!

**This drawing may also help __________________
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Old 10-12-2016, 04:15 PM   #10
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Fantastic! The foam fills the space between the pipe and the cut in the roof. Thanks so much for the visual!
Looking forward to solving this smell problem once and for all.
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