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Old 05-23-2020, 05:52 PM   #1
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Black water tank leaking

I have a 2018 Minnie Winnie 22R and when I flush the toilet water drips down the side of the black water tank from the top. No evidence of leaking inside the RV. Only leaks when flushed. Not a large amount but I sure would like to fix it. Any ideas on the repair.
Thanks in advance for any assistance anyone can provide.

R,

Dean Jones
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Old 05-23-2020, 08:58 PM   #2
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So how's the experience level on bathroom plumbing? Got an idea of what the wax ring under the stool does, etc?
My thinking is this. The tank itself is probably not the cause as you see it on top but something above that. Winnebago does a really good job of posting online info for the later model motorhomes and you'v done a good job giving enough fo the important info to let me look at the parts drawings for your rig.
I'm seeing no other openings along that top and the line drops straight down into the black water tank. so my move would be to pull the stool and check the big ring that seals the stool to the floor and passes the waste on down passing through the floor.
Hoping to see a puddle and make it possible to replace whatever an RV has that functions the same as a wax ring on house plumbing!
Hope I can get a good enough picture posted to make it clear to you! Yellow is the black tank, green and blue are the area I mean? Guessing but this might be a simple hardware store item??? Pull the stool to see more!
From the parts catalog:
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Old 05-23-2020, 09:05 PM   #3
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view from side?
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Old 05-24-2020, 08:39 AM   #4
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Thank you so much Morich. Going out to pull the toilet now and hopefully correct the issue.

Dean
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Old 05-24-2020, 09:15 AM   #5
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Wearing gloves? Maybe a nose pin!
But it is a pretty straight shot and not very far down there, so good luck!
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Old 06-01-2020, 11:51 AM   #6
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Any updates?
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Old 06-01-2020, 04:12 PM   #7
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4razorbacks, the floor flange was cracked on ours allowing liquid to leak out on top of the black tank. Started smelling it just as we crossed into Canada last fall and had to live with it for 2 weeks, it was bad. Found Winnebago had installed the floor flange off center of the floor hole and the tank shifted causing the flange to crack. Centered the tank hole with floor hole and added some shims to keep the tank in place and installed the new floor flange.
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