ticki2 wrote:
Question for the cassette users , can it be over filled or is there a safety device to prevent it , not just a gauge ?
Don't know about all brands but the cassette toilet in my previous Northstar 8.5 Arrow did have a float type mechanism in the tank which I assume was overfill prevention (never let it get to that point).
We were camped at Crater Lake NP when it (me) screwed up and wouldn't allow the slider valve on the tank to close. Although only liquids in the tank it was no fun fixing it. Had to remove the float mechanism never did reinstall it.
One thing to be aware of with cassettes is that the tank seals air tight when closed. If you go from a low altitude to higher altitude the tank internal pressure pushes against the inside of the slider valve potentially making it impossible to open the valve. This is what happened to me at Crater Lake and I foolishly brute forced the inside lever. After that I carried a short stick in the toilet to depress the valve (obviously prior to using :)) when needed,
I would prefer a cassette over a toilet with small holding tanks. One reason I like my AF 990 is that it has big tanks for a TC.