Black Tank Sensor contacts

If you want the black tank & sensors super clean, use some Liquid Drano. It won't hurt metal or plastic. Our owners manual says to use it. We've been using it once or twice a year for 5 seasons. Only problem is, the sensors stop working again in no time.

Resistance is futile. Trying to get the tank sensors to read properly is a waste of time. Looking down the toilet is a better method. I installed a shutoff valve at the back of the toilet so I can look down and see the level of the "stuff" more clearly.

We installed the Horst Miracle probes. They didn't help at all. I think the problem is because the in-tank rinser is on the same wall as the sensors and they never get rinsed off. We also installed them in a previous TT and they worked great. The size, location of outlet pipe and sensors of your tank will affect how well the Horst probes work.

wa8yxm wrote:
Contacts, what contacts. The "Sensor" is nothing more than a nail pin or screw. A simple metal rod that extends into the tank with a screw fitting on the outside head.

Try Horst miracle probes (I keep meaning to buy) or upgrade to a See-Level system which uses entirely different technology.

I had heard the Horst went out of business, apparently Valterra bought the business. Anyway, here is a brief explanation of the problem: Valterra probes

Install a sprayer in the tank opposite the probes. Also read up on the Geo Method. It might take a couple of treatments but it works
The Geo Method

I don't use Calgon as it is expensive. I use the cheapest softener and dish soap I can find.

On our last 3 trailers I've had good success using a toilet wand along with the tank rinser. But after the first dump, the black tank never reads empty until I clean it again.

Gave up on working sensors a long time ago. Looking down the flush valve when open gives a very good idea of how full. And water in the bathtub means dump it.

Contacts, what contacts. The "Sensor" is nothing more than a nail pin or screw. A simple metal rod that extends into the tank with a screw fitting on the outside head.

Try Horst miracle probes (I keep meaning to buy) or upgrade to a See-Level system which uses entirely different technology.

Ignore them, otherwise you'll have to clean them with every tank.
If you really want to make them work, stick a wand down the toilet and shoot the sensors with a strong stream of water.

Install the seelevel 2 system made by Garnet Industries.