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Old 08-06-2015, 08:39 AM   #1
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Black water tank still at 2/3

?? Ideas on as to why, after emptying (hear nothing movin' on out) my black water level button/light still says 1/3 or 2/3...is it because it's not level? I have a black tank flush connection (never used before) am I supposed to use this regularly? I am on a seasonal sight year two...33RLDS...and loving it...
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Old 08-06-2015, 08:43 AM   #2
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The sensors are wildly inaccurate at best. Could be a lot of things. I've heard of people having these problems and finding it was TP stuck to sensor. It wouldn't hurt to try your black tank flush.

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Old 08-06-2015, 09:13 AM   #3
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Something may be on the sensor giving a false reading as mentioned above.
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Old 08-06-2015, 09:26 AM   #4
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Black sensors are only correct when the tank is brand new and unused. After that it's a crap shoot (sorry for the cheap pun). "Stuff" will glom onto the sensors and cause false readings. I think TP is mostly the culprit. I've noticed after a good cleaning (rinse, rinse, rinse...) it will show empty. After a couple of flushes, boom, 2/3 full. I'm guessing the splashing gets whatever is glommed onto the sensor wet and the tank reports full again.
There are sensors that claim not to foul but I don't think its worth the effort.
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Old 08-06-2015, 09:26 AM   #5
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A tank flush will fix it, but it will at best be temporary until your sensor gets covered with TP on the first trip out afterward.

My gauge? I look straight down the toilet with the valve open.
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Old 08-06-2015, 10:06 AM   #6
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My 33LDS does not even come close to emptying without using the factory flush. I don't even bother dumping at CGs without full hook ups. I just do it at home due to how long it takes. It makes no difference if I start off with lots of water. I still have to run the flush for quite some time. It will read full as the flush is on due to the water completing the circuit. But when I am done, it will read empty.
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Old 08-06-2015, 10:29 AM   #7
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Greetings Campers,

Try this Youtube channel https://www.youtube.com/channel/UC2E...uwQn-uCHl58m_Q they have a lot of great how to's.
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Old 08-06-2015, 10:44 AM   #8
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Quote:
Originally Posted by 33 RLDS View Post
My 33LDS does not even come close to emptying without using the factory flush. I don't even bother dumping at CGs without full hook ups. I just do it at home due to how long it takes. It makes no difference if I start off with lots of water. I still have to run the flush for quite some time. It will read full as the flush is on due to the water completing the circuit. But when I am done, it will read empty.
I agree I used ours each dump and it's amazing how much crap (sorry) it flushes out after the tank is "empty". Mine will read empty then. Being in a stationary situation I would use your flush each time, you don't have the advantage of agitation in the tank when moving. Good Luck !
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Old 08-06-2015, 01:02 PM   #9
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i empty the black tank at the campground and flush 4-6 times when i get home i have a dumping station built into my home pluming
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Old 08-07-2015, 08:25 AM   #10
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Ignore, ignore, ignore! As others have said, it's not at all accurate. We drove ourselves crazy in the beginning, but quickly learned not to pay attention.
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