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It's not practical to empty the flush tank every time you travel in a motorhome, unless you're at a loss for something to do.  

Or is it necessary for the chemical reaction in the collection tank?

You can leave out the chemicals, I've done it before. If the waste cassette is emptied regularly it's not a problem.

In our last 'van, a compass avantguard 200, we had a top tank but we gave up putting chemicals into it as we started to get staining in the toilet bowl, the van we have now uses the on board fresh water tank so no real difference there. We do empty the waste as often as poss, as we do a lot of wild camping it is better for us to take any opportunity so every day if poss or it might have to wait a couple of days.

Tina

Vast changes in pressure will make your toilert explode, basic laws of physics, so if you do go into the mountains make sure to open the loo regularly so that it can equalise. Saying that I went up to Nordkapp un-aware of this issue until someone told me about it, without any problmes at all. There again with having kids they are constantly going to the toilet so they do have their uses after all.

Do not have the problem with the toliet flush, as its fed from the main water tank. But I would be rather annoyed if I could not use the toliet whilst travelling around

Quote: Originally posted by sunshiny on 27/10/2006

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Quote: Originally posted by colinbess on 27/10/2006

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The only trouble I have had occurred some years ago high in the French Alps.  We had stopped for a loo break and the waste tank "exploded" on opening the vane covering all and sundry in a nasty mess!

 

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Holy s***!!!