Thetford Cassette Porta Potti?

Flushing water will not get contaminated as you said as the units of waste and water are separate.
What you can do
Does this ony occure when toilet flushed?
Dry out the cassette housing fill tank with water see if housing gets flooded again.
If not it may be the link between the flush jet and flush tube. If wet without flushing then it could be a split in the water tank. Lastly don't rule out the water tank level indicator it may be where it's coming from so check it again. On mine it's clipped in an upright position if yours is laying down then that could be the problem.

Check or check with Thetford.


UK & EUROPE www.thetford-europe.com
Australia www.thetford.com.au (Even get request from Australian campers)
Australia site has stockist list.

HOME PAGE SELECT ENGLISH {if in Australia forget this selection)
NEXT PAGE SELECT CUSTOMER SERVICE (top line)
NEXT PAGE SELECT USER INFORMATION (left of pic) also 'Ask thetford' is on this page.
NEXT PAGE SELECT REPAIR INSTRUCTIONS (left of pic)
NEXT PAGE SELECT BUILT IN TOILETS [top right of pic]
NEXT PAGE SELECT This is where you select your toilet range. Search alll if unsure of type/range
NEXT PAGE PDF Files You should be in the pdf folder list on your Thetford toilet. Start downloading.


To direct link to the Thetford download site type in the following
www.thetford.eu/web/show/id=51498/langid=42

Don't bother for Thetford fridges they tell you for safety reason to take it to a service centre

bob
May 2010