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Old 07-23-2012, 09:21 AM   #1
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Cleaning Tank Sensors??

My tank sensors are not accurate (Black / Gray).. When I use a wand on a garden hose in the black tank, after several minutes of cleaning, the black tank sensor starts to read accurately BUT there is no way to go this for they gray water tank... Is there something that you can add to both tanks that are filled to 1/3 full of fresh water and let it slosh around while driving to the next camp sight where the tanks can be drained? Any products that will do this?
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Old 07-23-2012, 09:30 AM   #2
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Dawn dish washing soap.

If you have an empty gray tank, you can snake a hose with a power washer nozzel on it up thru the drain line if all else fails.
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Old 07-23-2012, 09:33 AM   #3
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The geo method explained in this link. Simple, cheap, and very effective.
https://sites.google.com/site/cbruni/

At least it worked for me!
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Old 07-23-2012, 09:36 AM   #4
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Quote:
Originally Posted by Auto hauler
https://sites.google.com/site/cbruni/

At least it worked for me!
Yup GEO method is what we use too. Wrote a blog post about this too:
http://wheelingit.wordpress.com/2012...he-geo-method/
It's not perfect, but it works for us
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Old 07-25-2012, 09:21 AM   #5
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Yup GEO method is what we use too. Wrote a blog post about this too:
RV Tank Sensors &The GEO Method | Wheeling It
It's not perfect, but it works for us

Just read the GEO site yesterday, printed it and am eager to try it.
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Old 07-25-2012, 09:46 AM   #6
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We use the Geo method also and our sensors work well most of the time, but most of us who spend a lot of time in rvs expect the sensors not to work and have simply stopped relying on them. We learn how long it takes for the tanks to fill and dump accordingly. We spent a couple of years pulling our hair out worrying about stupid sensor readings until we talked with experienced veterans and saw on forums like these that in tank sensors do not work well.

I should have known better. Our plant had several chemical processing systems with automated level controls. Our highly educated, experienced chemical and electrical engineers were forever seeking funding to upgrade sensors to elaborate exterior sensors. During their presentations they would always point out that in tank sensors of all kinds were just failures waiting to happen.
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Old 07-26-2012, 12:37 PM   #7
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GEO

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Just read the GEO site yesterday, printed it and am eager to try it.
Local supermarket did not have any powdered water softener. Ideas? Thanks.
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Old 07-26-2012, 12:38 PM   #8
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Old 07-26-2012, 01:47 PM   #9
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I order mine on amazon.com
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Old 07-26-2012, 01:59 PM   #10
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Quote:
Originally Posted by Phoenixwood View Post
My tank sensors are not accurate (Black / Gray).. When I use a wand on a garden hose in the black tank, after several minutes of cleaning, the black tank sensor starts to read accurately BUT there is no way to go this for they gray water tank... Is there something that you can add to both tanks that are filled to 1/3 full of fresh water and let it slosh around while driving to the next camp sight where the tanks can be drained? Any products that will do this?
Pine Power (from Dollar General store), 1/3 fresh water, 2 to 3 cups, drive to next location, add more water and flush tanks. Add more Pine Power and use tanks as normal. May not always work because the internal gauges are notorius for not being that accurate even when you know tanks are empty.
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Old 07-26-2012, 02:01 PM   #11
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Local supermarket did not have any powdered water softener. Ideas? Thanks.
Try Calgon Liquid water softner - it is at Wal-mart - laundry area, bottom shelf.
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Old 07-26-2012, 03:59 PM   #12
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Try Calgon Liquid water softner - it is at Wal-mart - laundry area, bottom shelf.
Liquid works fine. Most grocery stores carry it, normally on top shelf near borax and other additives. If you are in an area with normally soft water, it may be a bit difficult to find.
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Old 07-27-2012, 07:23 AM   #13
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Didn't have any issues with our sensors on our first trip, but just got back yesterday and see that our black water tank is still showing 2/3, after emptying. I'm looking forward to trying this new cleaning method!!! <<YAH>>
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Old 09-04-2012, 12:55 PM   #14
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Yup GEO method is what we use too. Wrote a blog post about this too:
RV Tank Sensors &The GEO Method | Wheeling It
It's not perfect, but it works for us
I purchased a 2005 Class C Fleetwood Jamboree about a month ago. After our 2nd use and 2nd dump, I also had trouble with my black tank sensors. I Googled my problem on Sunday and ran across your blog. I tried the Geo method yesterday and it worked perfect. Instead of using Calgon I used Borax and it work perfectly! Thanks for the advise!
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