Hi Rose
I guess you know now whether there is a filter or not but I took the back off my daughter's machine tonight and cannot find any filter. Very strange as our Bosch w/m has one at the front . There is a hose underneath the drum that feeds to the pump and there is a small cap on this which looks as if it can be removed but i was not risking water all over her floor . Hope this helps
SJP Nottingham, November 2007