We have seelevel sensors on our Monaco, I put them in in 2012. Most recently, maybe 2 months, the gray tank sensor says 100 all the time. (when draining it goes to 95 for a bit, then back to 100) T...
"Elias"...... mine wasn't a Seelevel. It was a rand that is no longer made. It had an orange backlit window with all tanks showing. My laptop has a photo, but is out for repair.