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Old 10-29-2015, 11:14 PM   #1
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Black tank flooded inside

I had just emptied black tank then did backflush cleaning. Tank is empty and i closed valve. Emptied grey. I then added a filter to the city water hose and connected to port. Turned on the water and left for a while. When I came back the toilet had overflowed a lot. I turned off city water then I checked black tank and it was full of water. I drained it and mopped up water. I turned on water again and watched it for a while but no problem so far. I called dealer and no clue. Anyone ever have this experience?
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Old 10-30-2015, 12:54 AM   #2
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You have two connections in your water bay. One is for fresh water to the coach and the other is a blank tank flusher. It sounds like you hooked up the water supply to the flusher instead of the city water inlet.
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Old 10-30-2015, 01:41 AM   #3
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Quote:
Originally Posted by Dutch Star Don View Post
You have two connections in your water bay. One is for fresh water to the coach and the other is a black tank flusher. It sounds like you hooked up the water supply to the flusher instead of the city water inlet.
Yep, you only make that mistake ONCE!!
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Old 10-30-2015, 03:12 AM   #4
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The other thing that can happen is the toilet valve sticks for whatever reason. BTDT. It is one reason I never leave the setup hooked to city water. That limits the damage to the capacity of the Fresh tank and only happens if the pump is on.

That was the old MH. As Mr D said, it is something one tries hard not to repeat...
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Old 10-30-2015, 08:02 AM   #5
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Quote:
Originally Posted by Dutch Star Don View Post
You have two connections in your water bay. One is for fresh water to the coach and the other is a blank tank flusher. It sounds like you hooked up the water supply to the flusher instead of the city water inlet.
Yup, that will do it every time. Usually a placard is installed on the black tank flush inlet warning about leaving the water attached and running unattended..
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Old 10-31-2015, 10:25 AM   #6
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Black tank flooded inside.

Sorry folks, but the hose is hooked up to the city water port only. If I have a back flush port I haven't found it. Once I drained the tank everything is back to normal.
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Old 10-31-2015, 10:36 AM   #7
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I would help to know what kind of RV you have. Make, model, year.
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Old 10-31-2015, 11:23 AM   #8
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Sorry folks, but the hose is hooked up to the city water port only. If I have a back flush port I haven't found it. Once I drained the tank everything is back to normal.
Then how did you do the "backflush cleaning" as stated in your first post?
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Old 10-31-2015, 12:55 PM   #9
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Then how did you do the "backflush cleaning" as stated in your first post?

Probably with a hand held wand type inserted directly into the black tank through the toilet.


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