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Old 10-21-2013, 11:03 PM   #1
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Hi all. Loving the RV lifestyle in our 36FL. Close on our house tomorrow so guess we're pretty committed at this point.

Our black water tank sensor has not worked properly since the purchase (always shows 2/3 full). I have tried several times traveling with the tank partially full with cleaner and it works for a couple of days then back to same. I am thinking of trying the Camco Swivel Stik but I'm not sure if the black tank is directly below the toilet or if it is offset - in which case I'll need the Flexible Swivel Stik. Does anyone know this?

Also, any pos/neg experiences with the Swivel Stik or other method for getting the sensor to work properly would be appreciated. Thanks

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Old 10-22-2013, 06:45 AM   #2
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Empty your black tank and pour ten pounds of ice down your toilet before moving to the next campground. Once at the campground, and connected to a sewer, connect your water hose to the sewer flush connection in your garage convenience center, turn on the water for five minutes. Turn off the water and open your black tank. You should be good to go.

Water is your friend to keeping your sensors clean. When flushing, when you no longer see debris coming through, keep the water flowing for another 15 minutes.Edited by: Adamsvr
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Old 10-22-2013, 07:59 AM   #3
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Like adamsvr said - ice someties does it, but if it's one of the 'higher' sensors, you may have to fill up TO that 2/3 height to slosh away the 'hanger'...
Wondering - do you usually leave the black tank drain open all the time when connected to sewer ?

One thing I've found is that I leave all drain valves closed until full (or ready to dump), then and only then dump black first, then grey...

More volume = better flush and less likely of sensor issues...

When I first starting this rv thingy, I had a sensor 'hanger' and filled the tank up and dumped calgon beads in there while towing to the next spot... that fixed it...

Also, after dumping I usually leave a few gallons of water in the black tank... so much for poop 101



Edited by: johnboytoo
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Old 10-22-2013, 08:01 AM   #4
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Thanks Adamsvr. Had not heard of that method so will give it a shot. Any idea as to whether the black tank is directly below the tiolet or off to the side? Also, whether the sensor is internal or sits on the outside of the tank? Thanks again.
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Old 10-22-2013, 08:09 AM   #5
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Thanks Johnboytoo. I think when we were real newbees earlier this summer, we did leave the black tank open on occassion and that does correspond to when we started having issues. We do now leave the valve closed till full, release it, then use the tank flush till clear. Will try to flush for longer as you, the Calgon beads and leaving some water in the tank for travel (we haven't consistently done that). Out of curiousity, do the Calgon beads work mechanically or do they have a chemical/cleaning efect. Maybe a combination of ice and the calgon beads would be a sure thing
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Old 10-22-2013, 08:27 AM   #6
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Quote:
Originally Posted by Oregonbound
Thanks Adamsvr. Had not heard of that method so will give it a shot. Any idea as to whether the black tank is directly below the tiolet or off to the side? Also, whether the sensor is internal or sits on the outside of the tank? Thanks again.
The black tank is more or less directly below the toilet. The sensors are drilled through the outside of the tanks and protrude into the tank.They look like they are made of brass and have one ground wire connected to them. When water levels reach each sensor, the circuit is closed and the appropriate light is illuminated. What normally happens is toilet paper hangs on one of the sensors and closes the circuit prematurely. That's why it's important that you use quick dissolving TP designed for RV's/Boats. We use Scott's available in Walmart RV section.
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Old 10-22-2013, 08:35 AM   #7
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Also, when you leave the black tank open, sewage builds up like a mountain at the bottom of the tank and then hardens, where water can no longer flush it away. That's why you important to close your black tank valve after flushing so liquids keep things soft until you flush.

We do normally keep our Galley and Grey tanks open when at a campground. Hope that helps.
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Old 10-22-2013, 09:22 AM   #8
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It helps Thanks. Think I may try the Flexible Swivel Stik to see if I can clean the sensors.
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Old 10-22-2013, 09:24 AM   #9
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Besides Calgon, has anyone used any other chemical treatments such as Drano, etc.?
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Old 10-22-2013, 09:34 AM   #10
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Don't use Drano! It's too corrosive and can eat the rubber seals on your valves.

I have used Pine-Sol, but it really didn't do the job.

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