Sensors apparently need cleaning because readout shows3/4 full or occassionlly1/2 full, when I know it is as empty as can be. Can you recommend one product that willclean the sensors? Thank you

Some folks throw in a bag of ice and drive around, others, have black tank sprayers (either built in or use a wand through the toilet.) Still others just accept that they are inaccurate and forget about it.I have used dynamite with good success.

Do you have one of those wands that you put down the toilet drain pipe? I use one about every second or third time I dump and my sensors stay clean. I have a "swivel stick" that has a brass nozzle that spins around and sprays everywhere. They have one with a flex hose on it for toilets that aren't mounted right on top of the black tank. They also sell a cheaper one that just has one fixed spray jet that you presumable twist all around inside the hole to clean all the sides and wash everything down. Finally, the tornado rinser seems like a good product. I bought one but haven't installed it yet. It's the same concept as the swivel stick but permanently mounted in the tank. The advantage is you don't have to drag a hose through the camper to use it. It has a piece of hose that mounts to a bracket and you just hook the water up to it right there on the outside of the camper. The down side is you can't twist it all around since it's mounted in the tank.The other solution is to put several bags of ice down the toilet and drive it on a twisty bumpy road. The ice should slosh around and scrub the tank. Then use a rinser either every time you dump or maybe every other time to keep it clean.Swivel Stick like mine but with a flexible extensionTornado Rinser that you have to mount in the tank.Cool video testing tank mounted rinsers by The Fit RV

downtheroad wrote:I have used dynamite with good success.But only once.... :B

Some European rigs have a round hatch at the top. This would be nice for cleaning out a black water tank... worst case, get a good pair of elbow-length gloves, a scraper and a wet/dry vac, which should take care of almost anything.

I gave up on those sensor. Strange as it may seem, our BT will go about two weeks from empty (like clockwork) before needing to be emptied with DW and I on board. I start to look and hear when that times coming. After dumping I mark the date on a calendar.

cleaning sensors in black water tank | Good Sam Community

Valkyriebush
Explorer II
Mar 20, 2015
Swampman597 wrote:
Valkyriebush wrote:
our BT will go about two weeks from empty (like clockwork) before needing to be emptied with DW and I on board.

Whatcha expect? The poor black tank doesn't have a chance. Everyone knows Master Chiefs are full of******AND Command Master Chiefs are really full of it.

Ha-ha, Mike howzit going?

Mike

LMAO, Hey Swampman! Don't be disclosing Chiefs Mess secrets. lol Good to see you on the forum Mike.
Jopops
Explorer
Mar 20, 2015
I've heard excellent things about the GEO method. I'm going w/ that this year. Last year Happy Camper seemed to do a good job w/ my tank, but GEO makes more sense to me if you google it and give it a good read.
icanon
Explorer
Mar 20, 2015
Some people swear this solved their Sensor problem.
I have never used it but it seems logical.
Oldme
Explorer
Mar 19, 2015
Lots of water and Dawn Liquid.
Also add some "dish washing liquid" that
has sheeting action. If you can find Calgon
Water Softener it will also give you the sheeting
action you need to get the scum to glide off the sides.

They read incorrect because the scum completes the electrical
circuit to tell the sensors to activate.

Also crushed ice added while you drive will agitate and help clean.
DrewE
Explorer II
Mar 19, 2015
The wand thingy seemed to work for me. I would imagine a good thorough soaking beforehand (filling the tank with water and letting it sit) would help loosen crud. I've also read that automatic dishwasher detergent is sometimes helpful. Seems it might be worth trying in the pre-soaking, and at any rate wouldn't cause any problems.
kendall69
Explorer
Mar 19, 2015
gbopp wrote:
The Geo Method helps.

I don't really worry about the reading on the sensors. You'll quickly learn when you need to dump your tanks.

Geo method worked for me for 20 plus years. If it's really BAD tank with dried on "gunk" use clear water ONLY but pot in some septic tank enzymes that will "eat" the crud or at least soften it.

A day or two before a trip I load it up with the soap, water softener, pineSol, detergent, etc, and I add a couple of bags of CRUSHED ice, this does the scrubbing.

Drive around, let it sit, flush three times with clean water, then add some water and new toilet chemicals. Works in all tanks.
gbopp
Explorer
Mar 19, 2015
The Geo Method helps.

I don't really worry about the reading on the sensors. You'll quickly learn when you need to dump your tanks.
jfkmk
Explorer
Mar 19, 2015
Check out thefitrv for a video showing the effectiveness of ice cubes in the black water tank.....not very. It is an entertaining video, though.
ScottG
Nomad
Mar 19, 2015
I've tried everything including every caustic cleaner I could find. None worked.
Finally I made my own "wand" out of some 1/2" PVC pipe with a cap on the end and a 3/16 hole drilled into the side of it. The end that attaches to the hose just used a 3/4" threaded PVC cap.
The force of the water coming through that little hole does a great job. My DW watches the sensor reading while I blast away at it. only take a minute and it works perfect again.
For a while.
Swampman597
Explorer
Mar 19, 2015
Valkyriebush wrote:
our BT will go about two weeks from empty (like clockwork) before needing to be emptied with DW and I on board.

Whatcha expect? The poor black tank doesn't have a chance. Everyone knows Master Chiefs are full of******AND Command Master Chiefs are really full of it.

Ha-ha, Mike howzit going?

Mike