Thetford cassette toilet C220/C260/C400 model prep
Use this when a Thetford cassette toilet owner needs C220, C260, C400, tank-capacity, service-door, or visible model-family documentation before support.
Owner-safe checklist
- Compare only visible model family, tank capacity, service-door orientation, bowl shape, and label photos from normal owner access.
- Do not use the overview as retrofit, cutout, plumbing, or installation instructions.
- Record cassette model family, waste-tank capacity, flush-water setup, service-door side, serial-label photo, and exact symptom.
- Use Thetford support or qualified service if identification requires removal, retrofit decisions, hidden plumbing, or parts compatibility decisions.