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Old 05-12-2022, 04:30 PM   #1
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Back water tank

Iíve heard that in some rigs the grey water from bathroom sink drains into the black water tank. Is that true for Minnie Winnie 25B?
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Old 05-12-2022, 06:51 PM   #2
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Part of that might depend on which year you have?
But thenthere is a pretty simple way to test, so I might trust the test morethan the answers?
If you open the grey water drain and run some water in the sink, you will soon know if it does or doesn't come out. If no water in the fresh water tank and not handy to do it, just pour a jug of water in the sink...
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Old 05-12-2022, 06:55 PM   #3
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What year is your Minnie Winnie 25B? You can look up the plumbing diagrams on the winnebago.com website under owners resources. For the 2021 model 25B, the bathroom sink and the toilet drain into the black water tank. The kitchen sink and shower drain into the gray tank. Different years may have different plumbing configurations.
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Old 05-12-2022, 07:43 PM   #4
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If shopping and want to look for info on items like this, there is a great source here:
https://catalog3d.winnebagoind.com/menu/Parts.htm

You can pick out a specific year, make, model, etc and look at any of the parts on that model, even down to what pipe goes where!

This is the 2020 model 25 B and the sink line goes to the grey, not black tank.
The bath vanity sink does go to black.
Click this pic for better view but the black is orange and the grey tank is blue in this drawing.
Hint? Black is the one the stool fits on!
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