Thetford C263CS Ceramic Bowl Swivel Cassette Toilet

Thetford Cxxx, in a wet room- ready to rott – I am using a Thetford C250 cassette toilet in a 2009 built motorhome in a wet room, meaning shower water is all around. (C263 is 50mm higher, but seems same design) I was always wondering why water can flow under the toilet from one side to the other, during showering. And now, as level indication (stopped years ago) and flushing gave up, I took… Read more

the loo out to inspect. Here it is, from an electrician. The two side rear corners are flimsy plastic covers. They let lots of shower water on the floor under the loo, where it can travel all around, and wont dry up again. If in my case I am parked up left side down, the water stays even under the loo until I change position. Permanent humidity under the loo raises up through the ‘service hatch’ or what it is, at the bottom of the cassette floor, and keeps the cassette room wet. The moisture from there reaches up to the electronic board at the level indicator, the fuse and relay, and up to the board on top, the level LED and flush switch. All plugs to the boards and electronics are rotten in my loo. From new, they will fail over time.

Those boards aren't cheap, the lid hinge broke as well, never knew how to remove the rear cover to tight the hinges. With every shower session, water got into the bowl, had to be released into the tank, filling it while not even using the loo.

The Thetford could last long, but they design an end into it. If I replace it with a new one, I would fix the loo on a pvc or acrylic sheet and seal it properly with silicone, and also cover the boards and plugs with silicone spray, to preserve them. By the way, the large wall cover slides simply up, no lock. Those Cxxx also need screwing onto the wall to avoid water running into the cassette compartment. Use stainless screws all around. update: Bought a Dometic 3110, much better underneath, put it on an acrylic base and sealed. Its shorter, doesn’t cover the cutout of the stupid RV builder. update: Bought a C263 now, tall enough, design slightly improved but still flimsy rear covers that will be also impossible to seal against water under the loo. See photos of the C260. I am done, looking for dry flush loos now. Note, none of the composting toilets compost, they prepare. You could live with a Separett Tiny dry flush loo and fan, using cat litter or so. The OGO has many parts that could fail, and spare parts are, what they make money off. So, as stirring in the loo doesn’t compost, why not keep it simple. The one that stirred properly was CHead from USA, closed down business. Keep it simple and use a plastic bag in the chemical loos bowl. I separate liquids on my chemical loo beforehand, rarely use the cassette.