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Old 07-26-2012, 02:47 PM   #11
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Thanks Wizerd, that's some good info.

Our toilet drops straight down into the tank so we can see what's down there and get the wand in okay. I've been wondering just what the sensor looks like - maybe a pair of wires that sense the change in resistivity? I've thought about installing one of the rinse devices on the side of the tank ("tornado"?).

Have tried filling the tank as high as I thought feasible and letting it soak before dumping. I can see how it is tempting not to flush with adequate water to try and save on filling the tank up too soon but that can worsen the sensor problem. I wonder if it would help to fill the tank up with a bit of water before you let solids drop into it?
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Old 07-26-2012, 02:57 PM   #12
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Before heading to the dump station, I empty some of the grey water into a bucket and pour into the toilet to fill the black tank ...more water will help empty it completely. I also use the blackflush until reasonably clean on the clear elbow I install before the waste hose.

Last step is to pour a cap of detergent and 1/2 cup of Calgon water softener along with 6 gal of water down the toilet to slosh alround on the way home. Yes, you lose some capacity but it keeps the black tank cleaner.

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Old 07-26-2012, 03:04 PM   #13
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Horst tank Probe Installation

Would actually be worth your time.
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Old 07-26-2012, 03:05 PM   #14
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Thanks Dave. Will try the detergent idea for a trip home. Is the Calgon because you have hard water there? Ours is typically soft on the west coast except for our well water at home.

I have to think that the toilet paper messes up a sensor? The RV stuff seems to be pretty good at adhering to all kinds of surfaces......
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Old 07-26-2012, 03:08 PM   #15
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And thank you Herk for that info. According to the little bit I've read on the 'net so far, it seems like all you do is install the new sensor and retain the existing readout and wiring. Have not found a price yet. If not too pricey, might be a great upgrade project.
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Old 07-26-2012, 03:08 PM   #16
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More info on your problem.

Troubleshooting the MicroMonitor
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Old 07-26-2012, 03:11 PM   #17
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Quote:
Originally Posted by myredracer View Post
Is the Calgon because you have hard water there? Ours is typically soft on the west coast except for our well water at home.
The detergent and calgon are to coat the insides of the black tank so that material doesn't stick as readily. It's referred to as the 'GEO Method'.

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Old 07-26-2012, 03:13 PM   #18
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I found they were very inexpensive and work great. Although I am currently troubleshooting a gray tank "full" problem right now, I believe the DW dumped some grease into the tank. Grrrr...

I bought a gallon of ZEP Purple and will let you know how it works. I talked to the inventor of the Horst probes and they are made of Teflon and stainless steel. The ZEP degreaser should solve my problem.
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Old 07-26-2012, 03:15 PM   #19
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I have to think that the toilet paper messes up a sensor? The RV stuff seems to be pretty good at adhering to all kinds of surfaces......
I have found the "TP on the sensor" a myth. The OEM probe is a stub and what sticks to it also sticks to the wall creating a resistance path to the ground sensor. It only needs to be 40K ohms to turn on the "FULL" light.
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Old 07-26-2012, 03:21 PM   #20
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29$ for grey, 34 for black.
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