Originally Posted by blubuckaroo
The display for the black water tank on our Pathfinder shows 2/3 full when it's nearly empty.
I noticed this the other day , so I filled the tank with clean water, and drained it. The tank then showed empty.
Now again, one day into our stay, it shows it's 2/3 full. That can't be with only one person using it.
You'll drive yourself nuts fretting over something that will NEVER be any better than it is now. You can rinse, clean, add magic elixirs & will work great til the 1st time you fill the tank again.
Pay attention to the sound when you flush, when the tank is getting full you'll notice a very different sound, similar to filling a bottle when it starts filling the neck of the bottle.
Welcome to RV tank sensors 101.