Help, black tank not flushing

[Roadventure]

So now that I've done this a few times I think I'm getting the hang of it. What I consistently notice is the grey tank indicators are entirely accurate while the black tank inicator is not. The sensor(s) must be gummed up. The gal at CW said there was a kit for that, not quite sure what she means or what it does.

The flashlight trick doesn't work for me since there is a bend in our pipe.


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[CycloneDave]

I use my gray water to back flush into the black tank to clear out the pipe.

First I completely drain the black tank while also running the black water flush.

With the Valterra Gate valve from Camping World ($25):

View attachment 45526View attachment 45525

I can block the drain so the the gray water is forced back into the black tank, thus removing any clog that might be there or forming.

I've found that it also helps to clean out the bottom of the black tank of any buildup.

Good idea. I think I will give this a try. I have found that using the blank tank flush is a must to get all the stuff out though.


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