We have a Thetford C2 and I have replaced the lip seal as flush water was disappearing into the cassette that problem now solved but it is still difficult to empty bowl contents as blade is very stiff and at best will open 3/4 of the way but my wife finds it almost impossible to open more than a quarter of the way. It has had a lot of use in our 9 year old motorhome!
Please help. Thanks

Robert Fletcher, May 2009

Thanks Cledlyn
I have tried the vaseline as seal was ok and linkage worked fine without the seal in place. Fingers crossed.

Bob, June 2009

Thetford have a very good help download pdf files follow these instructions to get to them.


UK www.thetford-europe.com
Australia www.thetford.com.au
Australia site has stockist list.

HOME PAGE SELECT ENGLISH {if in Australia forget this selection
NEXT PAGE SELECT CUSTOMER SERVICE (tope line)
NEXT PAGE SELECT USER INFORMATION (left of pic)
NEXT PAGE SELECT REPAIR INSTRUCTIONS (left of pic)
NEXT PAGE SELECT BUILT IN TOILETS [top right of pic]
NEXT PAGE SELECT C2, C3., C4 or select your model range
NEXT PAGE PDF Files YOU ARE NOW IN PDF FILE LIST

Bob, May 2009

1) Did you put the new seal in as per the instructions. It is suposed to line up in a particular way.
2) If you remove the seal does the blade move freely?-if it doesn't you have a linkage problem inside the mouth of the tank
3) Have you tried leaving the cassette with 1/4 inch of rinse water which has 'rinse aid' added after use?
4) My new seal was slightly stiff but it was eased by the application of a smear of vaseline on the seal plus(3) above

cledlyn, May 2009