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Old 06-06-2012, 02:46 PM   #1
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Black water tank

So I am the new owner of a 2011 Shamrock 21ss and was wanting to know any tips or tricks to get all of the water out of the black water tank.I can get most of it out but there is still a little left in the tank after draining.Any help would be much appreciated.
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Old 06-06-2012, 02:59 PM   #2
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Quote:
Originally Posted by dawg82
So I am the new owner of a 2011 Shamrock 21ss and was wanting to know any tips or tricks to get all of the water out of the black water tank.I can get most of it out but there is still a little left in the tank after draining.Any help would be much appreciated.
Should never drain it dry.
Read "great tip " thread

Also if your reading your tank indicators and it says there's still waste in the tank do not trust them.
They are inaccurate at best.
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Old 06-06-2012, 04:02 PM   #3
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Horst tank Probe Installation

Will explain what is going on and the "Fix."

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Old 06-06-2012, 10:46 PM   #4
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you should NEVER leave a black tank dry.
after you dump, you should be putting 3-5 gallons back in it as soon as possible.

otherwise, you'll have stuff that will harden and never leave the tank.
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Old 06-07-2012, 10:53 AM   #5
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Quote:
Originally Posted by bikendan
you should NEVER leave a black tank dry.
after you dump, you should be putting 3-5 gallons back in it as soon as possible.

otherwise, you'll have stuff that will harden and never leave the tank.
Or grow! Lol
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Old 06-03-2013, 07:48 AM   #6
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Originally Posted by Sshultz64 View Post
Question, after emptying the black and gray tank from my camper, the indicator for the black tank still showed 1/3 full. I flushed it out the best I could at the dump station, and even got under neath to knock anything loose. It is a fairly new camper, got it this spring, only been out only a few times. Could the indicator be stuck or something? Is there a way to reset it? I see that the suggestion I should keep some water in there? Is it too late for me now? Thanks to all
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Old 08-19-2013, 12:30 AM   #7
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Black Water tank

To make sure I get mine empty, I use couple of leveling blocks and lopside the trailer on the one side, then dump it. I also throw in several gallons of water before I go to dump it. Learned this the hard way. I believe when they say not leave it dry, but they're not that bloody big, so I don't want to leave two or three gallons in it. But, I also use an RV tank cleaning wand every few weeks and give it a good spray inside.
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Old 08-19-2013, 08:26 AM   #8
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we just used out mini light for the 3rd trip and noticed the black and grey is reversed on the panel inside the rv. was rinsing tank and wanted to fill it to capacity. kept watching the read out and it kept showing empty. just so happened to hit the button for the grey tank and it showed full. After dumping black tank the read out for the grey showed empty.
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Old 08-22-2013, 06:46 PM   #9
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Originally Posted by Mikeg View Post
To make sure I get mine empty, I use couple of leveling blocks and lopside the trailer on the one side, then dump it.
Depending on how your tank or tanks are oriented, this might be a bad idea.

In our 5th wheel the drain outlet is on the left side, but the tanks face towards the back of the camper.

Tilting our camper to the side would leave several gallons of liquid and lots of solids behind.

In fact, our best option is to raise the nose, but since that would mean disconnecting, a level dump works best.

If you have a galley tank, it can even be oriented different that the black tank.
That could make your technique worse (or better) depending on that tank's orientation to the other two.
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