Good job I looked it up you didn't say it was a Thetford unit.
follow below to acces thetfords free pdf repair downloads.
UK www.thetford-europe.com
Australia www.thetford.com.au
Australia site has stockist list.
HOME PAGE SELECT ENGLISH {if in Australia forget this selection
NEXT PAGE SELECT CUSTOMER SERVICE (tope line)
NEXT PAGE SELECT USER INFORMATION (left of pic)
NEXT PAGE SELECT REPAIR INSTRUCTIONS (left of pic)
NEXT PAGE SELECT BUILT IN TOILETS [top right of pic]
NEXT PAGE SELECT C2, C3., C4 or select your model range
NEXT PAGE PDF Files YOU ARE NOW IN PDF FILE LIST
bob, May 2009
