Thanks for the info. I was only in France week and didn’t use an aire. Italy same process. Slovenia couldn’t get the MH into the bay too large and grey dump only. Austria and Germany etc to come and thanks for the info. However as I say decanting into a cassette is really no Hastle at allI've no idea what you ve been looking for but at least 50% of French aires have a drive over grid, probably close on 100% of Stelplatze and many of the Sosta's. Sometimes you do need to have a look which way the pipes are running but generally they both go to the same place. The best practice is to use bio degradable treatments and clean up after yourself, I favour using the pipe as its cleaner and then you can use the grey element to give the gully a good swoosh afterwards.