C403L Cassette®

Connects Fresh Water Tank to Central Water Tank


  • Bench style cassette toilet
  • LED level indicator that can be installed on the left or the right
  • Electric push button for adding water to the bowl
  • Waste holding tank comes with wheels and retractable handle
  • Automatic pressure release vent ensures the waste tank is ventilated, avoiding excessive pressure


  • Fresh water tank connects to the RV's central water tank
  • Removable seat and cover for easy cleaning
  • Waste tank capacity: 5.1 gal. (19.3L)
  • Waste holding tank comes with integrated no-splash pour spout

The working mechanism in the holding tank is removable so the inside of the tank is easy to clean and maintain.

Caution: Do not use stiff brushes or homemade products to clean or lubricate the valve and seal of your cassette toilet, as these will damage the seals and surfaces, causing odors to escape from holding tanks. Thetford recommends using Aqua-Clean and toilet seal lubricants.

C403L Cassette - Toilet Dimensions
Product Details
High Profile
15-3/4" : 40 cm 10-3/16" : 25.8 cm 26-3/8" : 67 cm
18" : 45.8 cm 14-1/8" : 35.8 cm

Dealer and Service

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