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Old 07-19-2016, 02:05 PM   #11
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Join Date: May 2013
Posts: 8
Have the flexible one. Its fine. I don't just put it in and leave it in one place. I move it up or down a bit and the let it sit for a while. Don't forget to leave your drain valve open while you are using it.

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Old 07-19-2016, 03:15 PM   #12
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Location: Middle GA
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You can clean the sensors, so they work...until you start to fill it up. They are very unreliable and everyone knows it. Yes, you can buy expensive sensors, which may work a little better, but they too will become unreliable. You will just need to begin looking into the downtube (from the toilet) every day or two to get an idea where the level is. Once it gets to a level, which you are comfortable with (4-6 inches from the toilet), dump it. You will then have a pretty good idea of how often you need to dump. This timeframe is a guideline, and needs to have some common sense added to it. If someone gets ill and uses it more often, then you'll need to dump sooner, etc.

You an also use your grey tank as a gauge. It will likely need to be emptied sooner than the black tank, so when the grey tank needs dumping, dump the black at the same time.

Don't rely on the black tank sensors.

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Old 07-19-2016, 04:30 PM   #13
Join Date: Oct 2015
Posts: 89
I have a back flushing, clean out that connects between the dump hose and the trailer a water line connection to it sprays water into the black tank to clean it out.
Also, the old ice trick, dump a couple bags of ice and a bottle of treatment into your toilet before you leave on a trip. The sloshing ice scrubs the sensors.
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Old 07-19-2016, 06:32 PM   #14
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Location: Ayr Ontario Canada
Posts: 23
Just look...

For my black tank, honestly, I just look. I can tell with a flashlight looking down the poop tank of I am 1/3 or full way better than that sensor!!
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Old 07-19-2016, 09:06 PM   #15
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Join Date: Oct 2006
Location: California
Posts: 101
I have a built-in flush fitting that doesn't work that well. When I look down the toilet I can still see buildup. So I usually use my wand to finish up. No telling if there's material left out of sight though.

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Old 07-19-2016, 09:19 PM   #16
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I feel lucky . not only does my black tank flush work very well all the indicator lights work on the black tank . now the fresh water reads 3/4 full when empty but reads accurate when filling with water go figure . the kitchen grey tanks reads correct most of the time but off some times . i think steam from hot water and condensation set it off . the bath room grey works perfectly also
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Old 07-19-2016, 11:23 PM   #17
Join Date: Jan 2015
Location: Missoula, Mt
Posts: 89
Black Tank Wand

I agree with the folks who like the wand. It adds two or 3 minutes to dumping the tanks but it not only cleans the sensors it cleans the tank, does not cost much up front and is not hard to use or messy. I have 24,000 miles on my Prism and I have probably used it ten times. When I am not dry camping I use plenty of water to flush and make sure there is a couple gallons of water in the tank after dumping.
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Old 07-20-2016, 05:08 AM   #18
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Join Date: Apr 2016
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After I dump my black tank, I'll use the rinse to fill the tank with water and dump again. Two fills will usually clean the tank pretty thoroughly.

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Old 07-20-2016, 11:50 PM   #19
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Location: Vancouver, WA
Posts: 28
Black Water Tank Lights

I agree with Tarvidson, I use my wand (a straight one) and just stick it down the toilet with high pressure and run it up and down several times, (2 minutes max)...until water runs cleans at the outlet and end of story, tanks is clean and lights show empty. Toilet paper gets stuck to the sensors and causes them to glow as if the tanks was full, can drive you batty if you don't know the problem. The wand flush works just fine.......
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Old 07-23-2016, 08:00 PM   #20
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Join Date: Mar 2014
Location: New Ulm
Posts: 27
So I was just inquisitive today and unscrewed the belly on my wildcat and found my sensors right away found a couple that were loose! (Wiring) Then looking at my saniflush to my surprise there is a red hot water line hooked to it and traced the lines and its hooked into the water system!!!! Ok let your comments begin

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black, black water, tank, water

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