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Old 09-22-2014, 04:19 PM   #1
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Grey tank smell??

I have noticed a "black tank" type smell after I haul my trailer somewhere. It's pretty bad and lasts a day or two after we park. I have flushed the shower(we don't use) and bath sink. We hardly ever use the vent fan and haven't flushed anything yet. The smell is pretty bad.

Should I try to flush/sanitize the gray tanks? If so, then a suggestion on that would be helpful. I have read some about this and don't see a "fit" for my problem. The system is stock as far as I know. The smell doesn't seem to be about the sink or under.

At this point I am interested in any ideas.


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Old 09-23-2014, 01:12 PM   #2
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Exact same thing here. We do have a smell in our main bathroom from our shower after towing the camper for any "decent" distance.

Wife bought some gray tank deodorizers and we drop one into the sink (shared with the shower). You run water and it immediately dissolves. Bought it from Walmart.
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Old 09-23-2014, 01:23 PM   #3
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Cool. Thanks. I will get some.


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Old 09-23-2014, 01:26 PM   #4
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You need to keep the drain P traps filled with water. Sometimes, when you empty the grey tanks, the suction will pull the water out of the traps.
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Old 09-24-2014, 12:24 AM   #5
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I love how much this forum hope me overcome the novice learning curve - I didn't know about keeping water in the traps...


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Old 09-24-2014, 09:23 AM   #6
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Quote:
Originally Posted by OldCoot View Post
You need to keep the drain P traps filled with water. Sometimes, when you empty the grey tanks, the suction will pull the water out of the traps.
Interesting note about dumping the gray pulling the water out. I didn't know it would do that, but it does make sense.

But, I rarely dump immediately before leaving any more. I usually do it the night before. The next day I'll get a shower before we hit the road (sometimes even after I've disconnected everything).
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Old 09-24-2014, 09:29 AM   #7
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also if the trailer sits for a while between uses, the water in the traps can evaporate and allow odor to come thru. dump some Pinesol, Lestoil or similar thicker-than-water in the traps and it will stay a lot longer.
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Old 09-24-2014, 10:11 AM   #8
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Shower (Traps) in a RV are Not as deep as others. They can (Drain/Evap) easy! Youroo!!
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Old 09-24-2014, 11:19 AM   #9
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Shower (Traps) in a RV are Not as deep as others. They can (Drain/Evap) easy! Youroo!!
And apparently the traps in Sabres are some new fangled trap that isn't a "P". It is straight through but has some nodules on the inside that act as traps.

This looks like it is it:
http://www.drainmaster.com/main/2011...to-the-rescue/
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Old 09-24-2014, 11:25 AM   #10
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I always run water down each drain aftere dumping to make sure there's water in there.
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