For the last 2 weeks I have not been able to flush my cassette toilet.Pink water is installed ok.
My vehicle is a Ford Duetto Auto Sleeper conversion Motorhome [2003] fitted I believe with a C4 type Thetford Cassette toilet.
There is no pump response action when applying normal
flushing procedure.
[ retired Chartered Engineer] - is there an instruction fault finding leaflet.

Mr A.E.Porter, July 2010

C4 is the manual pump toilet and sounds like you need a new pump valves.
Go to www.thetford-europe.com
www.thetford.com.au for those in Australia and download the repair free pdf's for your model toilet.
if it is the manual one it can be modified to electric pump send thetford a message asking what will be needed.

bob, July 2010