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Old 04-23-2013, 06:49 PM   #1
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Black tank ?

Hey all, dewinterizing my 8311ss for the first time and going through the instructions, got up to flushing the system after sanitizing. Once I was done I was checking everything and noticed that my black tank was 3/4 full. So what is adding to the black tank? I assumed as per the manual that the black tank was for the toilet only, and i know I only added enough water to have it run clear from the antifreeze. So would it be the outdoor kitchen, just a guess? Thanks.
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Old 04-23-2013, 07:05 PM   #2
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What year is the unit?
Who winterized it?
Has the black tank been used prior to your de-winterizing?
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Old 04-23-2013, 07:12 PM   #3
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I am guessing your sensors are dirty giving you a false reading.
try this.
http://www.forestriverforums.com/for...ghlight=method
http://www.forestriverforums.com/for...ghlight=method
http://www.forestriverforums.com/for...ghlight=method
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Old 04-23-2013, 07:26 PM   #4
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2013, brand new, came from the dealer winterized.
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Old 04-23-2013, 07:50 PM   #5
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Quote:
Originally Posted by RSpicknall View Post
2013, brand new, came from the dealer winterized.
hmmmmm ok

Might as well dump black tank and see how much is in there .


i have seen weirder things but it is possible black tank gets filled via o.k.


How many tanks do you have ?
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Old 04-23-2013, 08:03 PM   #6
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Just the normal 3. I guess I will have to test it and see. just noticed the title say blank instead of black, oops.
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Old 04-23-2013, 09:03 PM   #7
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We got our 8311SS about a month ago. We haven't had any issues with the black water tank.
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Old 04-23-2013, 09:29 PM   #8
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It does not take much slime on the tank walls to drop the resistance enough to turn on those lights.

Check out "Horst Probes" or the capacitance ones. Either make a great upgrade project with simple hand tools.

http://www.forestriverforums.com/for...ion-16089.html
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Old 05-10-2013, 06:59 PM   #9
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We just recently learned about the Geo Method and that is the only way we are going from now on. We have a new camper and had some issues with false readings on black and gray tanks. We spent several "sessions" cleaning out the black tank and finally got it to read Empty. The last session we used a bottle of Super Clean, as advised by someone. It did get a bit more stuff out of the black tank, but the little bit we put in the gray tank just to be sure it was cleaned out, well, the suds from the Super Clean caused a false reading on the gray tank causing us to rinse some more and then we were good to go. So what I am sayin' here is even a soap bubble can mess with your sensors. We will skip the Super Clean next time as it is too sudsy. Do the Geo Method, let it soak, slosh it around and rinse, rinse, rinse, rinse and rinse some more. However, since yours is unused, that is strange. Those sensors are very sensitive. If it is possible, take it back to dealer and they can get it working.
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