[C320-list] waste water

[Warren Updike]

Gaetano, a late model 320, like your, should have all plastic hoses (tubes.)  If they have a shiny 
White surface, that is what they are and you should not have a problem related to the hose (tube.) If you are using fresh water flush and your vent hose is not blocked, then I'm not sure what to say about the cause of the odor.  

I think Odorlos is a very good product.  We've been using it for several years; and, with the fresh water flush, we've not had a problem.  Hopefully, you can find it from a supplier in Europe. Certainly, you can buy it from WestMarine.com. Try an RV supplier as they may charge less.

Google "peggy hall" the avowed expert on marine toilet systems for ideas.  Learn about aerobic and anaerobic bacteria.  It's the latter that make the odor. You need to promote the former.

Warren & Pattie Updike
1994 C320 #62 "Warr de Mar"