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Old 04-15-2016, 04:41 PM   #1
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Empty Back Water tank is empty but read 2/3

Empty Back Water tank is empty but reads 2/3. I have emptied my black water tank flushed it put some Pine Sol in it w/water and get home and it reads 2/3 full. When I open drain connect/valves shut, it dumps out a gallon of goop I'm not wanting to smell or see all over my driveway! What should I look for and why after emptying it still reads 2/3 full and has stuff left in the drain pipe when I get home? The movie RV comes to mind! Ha Ha (not)
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Old 04-15-2016, 04:49 PM   #2
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Well first of all its not uncommon for the meter to show 1/4 2/3, etc when empty. However it's possible that you could have a clog if your still getting stuff out. Do you have a black tank flush? If not I would recommend buying a black tank sprayer that you hook up with a water hose and stick down in the toilet.
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Old 04-15-2016, 04:55 PM   #3
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I am assuming from your problem that you do not have a black tank rinser. You probably have stuff stuck to your sensors.

While you were out camping, did you leave your tank valves closed? You should leave these closed and dump the black tank first at the end of your camping while it is full of liquids and solids. If you leave the valve open, the liquids leave your black tank and you are left with a glop ( technical term ) of solids. Then dump your grey tank to flush out the connection.

Good luck,
Don
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Old 04-15-2016, 05:06 PM   #4
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I've never, read NEVER, had an accurate black water sensor reading in any RV I've ever owned. I know me and my DW can go (no pun intended) about one week with moderate usage before needing to dump. I don't lose any sleep over the sensor readings.
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Old 04-15-2016, 05:30 PM   #5
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Next time dump then add about 2 gal water and a bunch of ice flushed down toilet Will clear it right up by the time you drive home. Later RJD
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Old 04-15-2016, 05:48 PM   #6
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Quote:
Originally Posted by Papa-t View Post
Well first of all its not uncommon for the meter to show 1/4 2/3, etc when empty. However it's possible that you could have a clog if your still getting stuff out. Do you have a black tank flush? If not I would recommend buying a black tank sprayer that you hook up with a water hose and stick down in the toilet.
+1

I do not use it every time but when I get a false reading, I will whip it out and rinse out the tank. Has worked every time so far.

Got mine at WalMart for less than US$20. Has a metal spinner on the working end that is driven by the water pressure of the hose.

Never have used the flush feature. The wand works great and I do not have to run back and forth worried that I might overflow the toilet and uses FAR less water with the same results.
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Old 04-15-2016, 06:37 PM   #7
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I found this video to be useful and thorough.

http://youtu.be/I6sv4d3PsTo
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Old 04-16-2016, 12:49 PM   #8
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Originally Posted by Fairenatic View Post
+1

I do not use it every time but when I get a false reading, I will whip it out and rinse out the tank. Has worked every time so far.

Got mine at WalMart for less than US$20. Has a metal spinner on the working end that is driven by the water pressure of the hose.

Never have used the flush feature. The wand works great and I do not have to run back and forth worried that I might overflow the toilet and uses FAR less water with the same results.
When using factory tank flush, if you have a clear elbow connector on the sewer hose, leave the valve open and you won't have to worry about overflow'n thru toilet...and you can see the flow and color...you're look'n for clear water!
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Old 04-16-2016, 01:01 PM   #9
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I think all RV manufacturers should include a disclaimer above the Action Panel. "Tank sensors are included solely for entertainment purposes and should not be considered a true indication of tank levels"
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Old 04-16-2016, 01:04 PM   #10
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Dipsticks would of been a better choice! Oh wait....a dipstick did design the sensors..
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