Caravan & motorhome technical questions answered by a professional


How do I repair the flush mechanism on my Thetford C4 cassette toilet?


Repairing the flush mechanism on your Thetford C4 cassette is quite easy and straight forward. You will need an Inlet tube (our ref 137027), a Flush tube (our ref 137026) a Bellow (our ref 130060) and a Flush mechanism (our ref 137028). You will need to lift the flush cap, take out the cylinder, bellow cap and housing. Follow the instructions on the attached PDF and the job will be done!