• C402-02
  • C402-01
  • s-l1600-1
  • s-l1600
  • s-l1600-1
  • s-l1600-2
  • s-l1600-1
  • s-l1600-2



Takes water for the flush from the onboard tank

Waste tank level indicator

Vent plunger for easy emptying without splashing

Powerful flushing system

Automatic pressure release vent

High quality plastic construction

SKU: TCS456 Categories: ,
The Thetford C403 toilet is available as a right or left hand model. A left hand side model is defined as: If you are sat on the toilet then the waste tank will slide out of the left hand side of the toilet.

The C403 differs from the C402 in that water for the flush connects to the onboard tank – the C402 water for the flush is poured into a fill cap.


Use in conjunction with the Thetford Door 3 for external access to the toilet cassette.

This combination uses the popular Thetford C403 cassette toilet along with the C400 shower tray and a straight waste plug outlet, providing you with everything you need to get started with your bathroom/wetroom. The Thetford C403 Cassette Toilet has several unique features for ease of use and convenience. Featuring a waste tank with wheels and retractable handle for complete ease of handling.

A lightweight yet robust design with optimal use of space, the Thetford C403 Caravan & Motorhome Cassette Toilet comes complete with an automatic pressure release valve which prevents a build-up of gases in the waste holding tank to reduce odours. The matching C400 shower tray fits perfectly with the toilet and can be trimmed to fit your installation. It is made from white thermoplastic with a gloss finish and is patterned to provide anti-slip properties.

Note: Item does not come with fixing brackets which are not required for install, but some prefer.


Short description C403 Cassette Toilet
Manufacturer Thetford
Model on label C403
Dimensions 400 mm H x 670 W x 258mm D
Weight 8.1kg
Seat height 358mm
Waste holding tank volume 19.3L
Flush water tank capacity 15L
Manual Download
C402C Cassette Toilet User Manual
Short description C400 Shower Tray
Outer Tray Dimensions 590mm L x 670mm W x 100mm H
Overall dimensions C400 Shower Tray and Toilet
Outer Tray Dimensions 860mm L x 670mm W

Additional information

Weight 5 kg
Dimensions 95 × 73 × 5 cm