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4Papa View Drop Down
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Joined: 31 Jul 2017
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Posts: 62 		Direct Link To This Post Topic: Black Tank Filled?
    Posted: 06 Jun 2019 at 11:11pm
Got a 2017 R180 and I have the seemingly standard unreliable black tank sensor as it always reads full. My question is, is the pipe from the toilet to the tank, straight?  It would appear so. Visually checking the level as to how close the waste is to the lower filler neck (with a flashlight and the water pump off) may be the only way to tell if I’m close to better-dump-soon time. 
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mcarter View Drop Down
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Posts: 3419 		Direct Link To This Post Posted: 07 Jun 2019 at 8:00am
Mine is.
Mike Carter
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4Papa View Drop Down
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Posts: 62 		Direct Link To This Post Posted: 07 Jun 2019 at 8:48am
Would you say the top of the black tank is at the very bottom of the 3-4" pipe extending from the toilet?
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StephenH View Drop Down
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Posts: 6326 		Direct Link To This Post Posted: 07 Jun 2019 at 8:58am
That is better than in our 179 where the pipe has a bend that makes it easier for stuff to clog. I use a good biological agent so when I do empty the tank and use the black water tank flush, I can get a reading of empty. However, it does not last. As soon as we use it and go down the road, the sensors get coated again and the reading is off. I'm not ready to spend the money on a SeeLeveL II setup which would be much more accurate since it reads through the tank wall instead of relying on an immersed sensor.
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Posts: 5290 		Direct Link To This Post Posted: 07 Jun 2019 at 9:31am
The gray tank and black tanks are the same capacity. The gray tank is getting all the shower water as well as the dish washing water. So, my gray tank always fills way sooner than the black tank does. If I dump when the gray tank is full the black tank is never a problem. Its hard to see a use case where you could get a full black tank before the gray tank fills up. Maybe if you're using the campground showers and/or washing dishes outside? 

The sensors in the gray tank are much more reliable, and worst case scenario you have some gray water in the bottom of the shower telling you the gray tank is overfilled. Let a little gray water out so it doesn't slosh and head for the nearest dump station....Wink
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Posts: 3419 		Direct Link To This Post Posted: 08 Jun 2019 at 6:48pm
4 Papa,

Yes I would say that. Not sure what other posts mean. I can see directly into my black tank from toilet interior.
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podwerkz View Drop Down
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Posts: 966 		Direct Link To This Post Posted: 08 Jun 2019 at 8:14pm
Seems like a sight-glass (or a clear tube installed vertically) on the tank itself would be a cheap backup indicator. Yeah, you'd have to look under the trailer, but it sure would be handy in some scenarios.


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Tars Tarkas View Drop Down
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Posts: 1447 		Direct Link To This Post Posted: 08 Jun 2019 at 9:11pm
Originally posted by podwerkz

Seems like a sight-glass (or a clear tube installed vertically) on the tank itself would be a cheap backup indicator. Yeah, you'd have to look under the trailer, but it sure would be handy in some scenarios.


Yeah, I dunno.  My guess is that the nature of a black tank would likely obscure a sight glass sooner or, less likely, later.  Some things may be better left unseen....

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Posts: 6326 		Direct Link To This Post Posted: 08 Jun 2019 at 9:24pm
I would not want to have to clean the sight glass because it got dirty from the black water. Dead
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Posts: 966 		Direct Link To This Post Posted: 08 Jun 2019 at 9:45pm
Better to be seen, than have the tank full to the brim and sloshing around and into the trailer interior when the monitor says empty....

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