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Old 09-10-2010, 05:30 PM   #1
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Question Odour after third time dumping

This past weekend was the 3rd trip w/ the Rockwood. Immediately after dumping there was a strange smell in the trailer. My buddy kind of panicked me as there was a trailer waiting for us. So I'm not sure if I added any fresh water into the BW tank for the trip home.

When I did get home Tues' night, I added a gallon of water & a packet of deodorant. Yesterday I went to a local provincial park & added water to the tank & dumped twice. This morning the smell was still there, so I added another packet & gallon of water.

The previous 2 trips the toilet was used & the BW tank dumped. There was no smell even before I added a couple of gallons of water & the deodorant. This trip was w/ a buddy who has an "overactive metabolism" (to put it mildly) & is new to RV toilets, so I wonder if I may have an accumulation of waste on the bottom of the BW tank? In the future on race weekends, he may have to use the track facilities if my next trip has a problem free dump.

I'm hoping to get rid of this smell & take 1 more trip before I winterize.
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Old 09-13-2010, 12:10 AM   #2
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Any suggestions as to how I can get rid of the smell? It's 3 days after the fill & flush. I don't have nearby access to a dump site here.

Would adding bleach to the BW tank help kill the smell?

BTW, there was no smell in the trailer before the tanks were dumped.
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Old 09-13-2010, 07:05 AM   #3
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Any possibility that the smell may be coming from the grey tank? If any of your traps on the sink or shower have dried out the odor will filter into the trailer. They can smell just as bad after a while. Fill the traps with water and some deodorizer and see if it helps. Just another possibility!
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Old 09-13-2010, 08:36 AM   #4
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Another thought. On our second last trip the trailer started to smell after we returned home. I'd assume the likely culprit was the black tank exhaust venting back into the trailer. While prepping/cleaning for our next trip we discovered some food waste on some plates in the sink hiding under the cutting board. Wasn't much there but it didn't take much I guess. One of the down falls of lunching on the side of the road while travelling I guess.
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Old 09-13-2010, 08:48 AM   #5
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Check the vent under the kitchen sink and bath sink.(located above the traps) usually a breather on the ABS piping which has a very unreliable rubber seal. As soon as I smell the odour I can bet it is coming from either of those vents. Dumping seems to dislodge the seal. (grey water holding tanks)
Can't for the life of me understand that this is allowed as it is a PITA.
Every trailer I have owned has had this problem
As long as there is water in the toilet bowl I doubt any smell could originate from black water tank
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Old 09-13-2010, 09:00 AM   #6
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Add Calgon to the black tank and fill it at least 3/4 full. Tow it a few miles. This will slosh the solution around inside the tank. Let the trailer set for a couple hours. Drain and flush the tank(do you have a tank rinser installed?). Add at least 3 gallons water and your regular tank chemicals.

The solution, when regularly used, will help prevent solids from building up on the tank bottom and walls.
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Old 09-13-2010, 10:22 AM   #7
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Mike, I had dumped a Calgon solution in the TT after I had gotten home.

Dezolen, I religiously make sure that there's water in the bowl. Talking to my brother last night, he asked me that as well. I guess if that "seal" is in place it's pretty hard for smells to escape from the black tank.

I've just run some water into all the sinks & the shower. I'll check later today for the smell test & will report back.
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Old 09-13-2010, 12:33 PM   #8
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Must be from those pesky vents near the sinks in the cabinets then. They can be unscrewed and replaced.
If you open lower cabinet door is smell stronger?
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Old 09-13-2010, 01:38 PM   #9
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I had the same problem not long ago, I kept flushing and dumping and the odor was still there and the water was coming out clear, so I connected a hose to the campground water supply with no regulator on it (full Force) and stuck the hose in the toilet with the black water tank valve open and flushed out the black tank that way and you would not believe how much stuff was held back because of the toilet paper and it work, odor was gone I can only guess that the sides of the tank was holding all of that stuff and I was not able to clear the tank completely, I now do this about every week, this is some thing to try it work for me.
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Old 09-13-2010, 07:58 PM   #10
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Quote:
Originally Posted by dezolen View Post
Check the vent under the kitchen sink and bath sink.(located above the traps) usually a breather on the ABS piping which has a very unreliable rubber seal. As soon as I smell the odour I can bet it is coming from either of those vents. Dumping seems to dislodge the seal. (grey water holding tanks)
Can't for the life of me understand that this is allowed as it is a PITA.
Every trailer I have owned has had this problem
As long as there is water in the toilet bowl I doubt any smell could originate from black water tank
I checked the vents after supper & they seem to be OK. There isn't any smell coming from the sink drains either, but you can smell the odour in the TT.

W/ the roof vents open & the fan (in the bath) on, there is no smell. I've closed the vents for overnight. After a few minutes, the odour is back. A couple of Renuzit blocks cover the smell, but the smell shouldn't be there in the 1st place. The odour is not as bad as it was before.
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