Before buying anything go to the thetford website
www.thetford-europe.com
www.thetford.com.au for Australia
follow the repair/maintenance you will come to 'ask thetford on page 3' after sending them email carry on through the sytem and you will come to the toilet listing for built ins select your toilet and free pdf downloads come up down load them all for your toilet and keep for reference.
Bob, February 2010