The seal on the door of the thetford cassette toilet is leaking on my 2005 Abbey Spectrum 535. I've found the part on-line bu thow do I know which door I have - there seem several different ones. thanks
What model toilet do you have fitted ? if you just have a central key it looks like door 2 ,If you have the key at the top or bottom with another button to press it loos like door 3 Service doors
The part numbers are on the bottom of the pdf files
It's easy to make a mistake. If you find you want a seal for door 3 I have one which is still in the original package. It's yours for a fiver + postage.