[Mikendebbie]

Turn the water off to the entire camper at the camp site hose bib until you can fix these issues. I am not sure I understand your statement about the kitchen sink. If it is overflowing out of the sink bowl - you need to drain your galley gray tank.

Go to a hardware store or Home Depot or Lowes and buy a braided flexible supply line with a valve. Put one of these on both of your toilets so that if your toilet craps out (pardon the pun) you can turn the water off at the trouble spot and still have water for the rest of the camper.

There has been many thread on this forum about the OEM Thetford toilets failing. I replaced the toilet in my full bath with a Dometic 310 or 320 - however the Dometic product will not fit my half bath. The Thetford is installed 11" from the wall and a Dometic requires 15".

You can research repairing a Thetford by searching this forum and decide if it is better to fix it or replace it. The Dometic 320 runs ~$250 - $320 on Amazon. Amazon also has lots of replacement parts for Thetford if you want to try a repair. Check your center flange measurement to the wall to see if a Dometic will fit.