Hi Peg, thanks for the reply. The toilet was just replaced
before we bought the boat so it is about 1 year old. It is an
Atlantes Freedom by Raritan. That's a good point about the
life of the aluminum tank. I, also, didn't realize the tank
sensors for the aluminum tanks were non-contact. Perhaps I'll
do as you suggest and install one in the old tank and make plans
for its replacement. I'll have to see what I can get below
the floor. Thanks for your input.