Black tank level sensor

Heard this the other day. A friend bought a Fun Run (or whatever it is called) and the black water tank sensors were not working. A couple had lived in it while building their house and drained their black water tank into the sewer. He talked to a experienced camper that said to put a lot of ice in the tank then fill it to about 1/2 full with water. Drive it to the camp site he was going to and by the time he got there all the water and ice sloshing around would clean the sensors. Well it worked for him.

rawest50,

There is a you tube video out there on a guy who did a test with ice cubes in the tank. BLUF was not as successful as advertised. I think best way to clean black tank is to fill before drain. Always. AND never drain before it is at least 3/4 full.

I bought one of the wands you insert through the toilet hooked to a water hose. I have not tried it. Do they work?

Also my Pod has the black water flush. Exactly what does it do?

I have one and yes they work, it injects a spray into the tank that does rinse the black tank. My black tank flush is a 90 hose barb that puts fresh water into the tank, no spray action. It just fills the tank with fresh water. You can disconnect yours and look at it.

I like the spray wand and use it once a year at the end of the season. For normal season, I don't want to run hoses into the Pod. So I fill to 3/4 using the flush and then drain. At the campground I don't want to hold up the line while I drag a hose under the Pod , into the trailer and wand out my black tank.

 A water FILL on the black tank? Weird. Can you take a picture or is it to inaccessible ?