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Is it usual to get some liquid on the outside of the cassette?  I'm not too sure about the finer detail on this one, as I'm keen not to make it my area of responsibility, but we're using our loo for night time peeing only on our two weekend trips away and my OH has commented both times that the top of the cassette is wet when he's taken it out to empty it on Sunday morning.  Is that normal or do we have some sort of leak from the toilet bowl?

Thanks for any help!

It may not be a leak.  If you have used or flushed the toilet fairly close to emptying it, it could be liquid on top of the slide.  Let me try and explain.

When you use the loo, the liquid/solid goes down the hole which is then closed by the black flap which should make the contents below the flap secure.  If you have flushed, and then closed the flap, it is possible that some of the flush liquid will be left on top of the black flap that seals the contents of the loo.  If this is not completely dry, it may well be this liquid which is leaking out.

When you remove the cassette from the side of the van, another slider flap covers the black pastic you see in the bottom of the pan.  The surplus flush liquid may be trapped beteen the outer flap and the inner flap.  This is not leak proof.  The fix is to check that there is no water in the inside of the loo - the black flap at the bottom of the loo must be completely dry.  If it's not then it might not be a very pleasnt job, but it needs drying with some toilet tissue, before extracting the cassette from the side of the van.

However, if the liquid has a blue colour to it (the colour of the toilet fluid) then it looks like a leak and that one of the seals need to be replaced.

Hope this helps.  Please post back if I have not been very clear and I will try again. 

Quote: Originally posted by jeff juke on 05/7/2011

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Impeccably explained David..

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Yes, thank you Jeff!  I clicked on your link - saw that the first couple of pictures involved a screwdriver and a toilet cassette and decided that it was a job either for OH or the dealership so have copied the whole thread across to him     Sorry - I think being 7+ months pregnant has removed any faint, lingering impulse towards DIY practicality on my part!

Michael - I believe it's a Thetford.  The caravan is 13 years old so I guess it's quite likely that the seal could have gone.

Michael - I believe it's a Thetford.  The caravan is 13 years old so I guess it's quite likely that the seal could have gone.

lets hope it is.

Quote: Originally posted by D S B on 05/7/2011

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However, if the liquid has a blue colour to it (the colour of the toilet fluid) then it looks like a leak and that one of the seals need to be replaced.

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Just to clarify - if the seal is leaking the liquid would only be blue if the flush fluid is blue and in fact most are pink I think.  It should not be confused with the (normally) blue or green toilet additive for smells etc. but I think that's what DSB meant.

Not being pickey but trying to help

Quote: Originally posted by oxter on 06/7/2011

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Quote: Originally posted by D S B on 05/7/2011

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However, if the liquid has a blue colour to it (the colour of the toilet fluid) then it looks like a leak and that one of the seals need to be replaced.

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Just to clarify - if the seal is leaking the liquid would only be blue if the flush fluid is blue and in fact most are pink I think.  It should not be confused with the (normally) blue or green toilet additive for smells etc. but I think that's what DSB meant.

Not being pickey but trying to help

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owner caravan fault finder.fab site and useful.

http://www.myidealcaravan.co.uk/faultfinder.html