Thetford toilets

Thetford toilets

The Type C 200 Thetford toilet cassette has a float to indicate when the cassette requires emptying. This float swings up away from the empting nozzle.  If when empting the cassette or when rinsing do not shake back and forth as this can dislodge the float.  Use a gentle anti clock wise motion.

Info from Nigel Abbott.