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Old 02-14-2022, 10:03 AM   #1
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Gray tank (not black tank) sensor cleaning question

This thread is only concerning gray tanks, not the black tank. And only concerns sensor functioning and not odor control. And I know about and have tried (with only limited, or no success) the geo method, dawn, borax, ice, Calgon, and all of the other recommendations. I've talked to two representatives of companies that sell black tank treatment products. Interestingly, both discussed how what will work in a black tank will not usually work in the gray tanks to keep sensors working. They both said that the problem with grey tanks, especially the tank that services the kitchen sink, is the oil and grease, from food and cooking, which manages to get into the tank coats the walls of the tank, and bacteria products don't work on grease or oils. They both talked about using lye to clean the tank, which sounds a little extreme to me. But, since they mentioned oil and grease coating the walls of the tank, I later wondered about products that are used to keep grease traps working. So, I went on Amazon and found a number of enzyme cleaners (Green Gobbler for example) used for grease trap maintenance that break down grease and oil, and other organic residues. So I'm wondering if any of you have tried a similar product and if so what kind of results did you have?
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Old 02-14-2022, 11:30 AM   #2
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One of our gray tank sensors started to read 1/3rd all the time, I tried a tank blaster treatment to no avail, so with the help of a You Tube video, I replaced the OE sensors with Valterra T21302VP Horst Miracle Probe sensors. The video shows how to easily get the old ones out, so you don't need to drill new holes in the tank. The design of these new ones keep the exposed 1/8" of the tip away from the tank side.

This is what I watched.

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Old 02-14-2022, 12:54 PM   #3
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Never had a problem using Dawn or Zep garage and driveway cleaner, Purple Power cleaner/degreaser, etc. All are faster, better, cheaper. Pour a quart or so down the drain at night after all done using the sink. Fill the tank as full as you can get away with and let it sit. 24 hours is best the first time you do this. Overnight may work.

Once freed up, it's a good idea to do that the day or two before breaking camp. Not a bad idea either to put some and two or three gallons of water down the drain before hitting the road. Sort of a belt and suspenders way to solve the problem.
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Old 02-15-2022, 09:26 PM   #4
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Garnet See Level. Inductive tank sensors don't get fouled up. ��
2019 Jay Flight SLX 7 195RBW
MODS: Dual GC2 LiFePO4 System, BAL (4) Stabilizers, Hengs vent fan, Dual Propane conversion, Furrion FOSO7TASF Rear Camera, Digital Thermostat, See Level 709P3W1003 Tank Monitor System, other cool things.
FUTURE MODS: Solar - in progress!
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