Hi everone, I have a 16-49-1ob 09 model and the sink seems to block up regularly in the van section not the sullage hose. I'm thinking there are too many elbows in the section from the sink to the end of pipe where sullage hose connects. I will try running hose straight down and remove all elbows so it ends up in front of wheel instead of behind, has anyone else had the same problem? Cheers.