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Old 05-25-2015, 06:47 PM   #15
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I don't think the newer sensors are any better. We just bought a 19' (2015) and the black tank stays at 0 for a long time, then the next level it shows is 47, then 75.
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Old 05-25-2015, 06:52 PM   #16
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There is a guy on Youtube who tested the ice cube theory in a clear black tank he made and it didn't do anything to clean the tank. I think he goes by Fit RV if you want to look it up.
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Old 05-25-2015, 06:52 PM   #17
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The best sensor for the black tank is eyeball it through the toilet.

it is hard to envision that you could ever fill the black tank in a week from those you can haul in your van.

When we are camping without sewer we often use the black tank by pouring dish water in the toilet to keep the gray from filling. Have gone 10 days this way
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Old 05-25-2015, 07:01 PM   #18
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Quote:
Originally Posted by HowieE View Post
it is hard to envision that you could ever fill the black tank in a week from those you can haul in your van.
Three adults and five grandkids can in a four day trip.
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Old 05-25-2015, 07:42 PM   #19
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Quote:
Originally Posted by Sneakinup View Post
"Black tank always looks half full"

Does that make you an optimist or pessimist? (sorry... couldn't resist)

I'm a black tank half empty kinda guy my self
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Old 05-26-2015, 11:54 AM   #20
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What brand of tank monitor do you have. The Micro Pulse sensors are notorious for false readings. I think one of the reasons for the Micro Pulse is they probably have never been properly calibrated even at Jackson Center. There was a recent article in Airstream Magazine which goes through the entire procedure to properly calibrate all three tanks. It is quite involved but makes perfect sense. You need to drain and fill each tank and use a connection on the back of the panel during the drain and fill process to "educate" the sensors. The amount of time and water required makes me sure it was never done at the time of installation. I'm building a new shop building with a full hook up pad next to it. When that's done, I'll do the entire procedure and post the results here.
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Old 05-26-2015, 12:36 PM   #21
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Our black tank gauge acts up as described above. AS has a hookup for cleaning but it doesn't do the job. I made a cleaning attachment that I put down the toilet which works well. The gauges work fine after little cleaning. The toilet dumps directly into the black tank so that is your access point.
I used a two foot piece of CPVC pipe with a hose attachment on one end. The other end has a 90 elbow and a short piece of pipe. the end was heated and squeesed to make a fan shaped spray. I put it down the toilet and turn it around a few times.
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Old 06-01-2015, 12:27 PM   #22
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Might want to check this video:
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Old 06-01-2015, 08:18 PM   #23
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Conclusion: you need to flush #2 w/ some water. Otherwise it's just going to stick wherever it lands.

I like the idea someone posted using a 90* fitting and sticking it in the tank and spraying.
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