
Manufacture of conversion kits for converting chemical cassette toilets into separating cassette toilets for motorhomes and caravans

Arwinger
New on Amplifa
About Arwinger
Arwinger develops and manufactures separating cassette toilets and conversion kits for the caravan and camping sector. With the conversion kits, common chemical cassette toilets from the brands Thetford (C220, C200, C250/C260) and Dometic (CT 4000) can be converted into separating toilets without any special expertise, in which solids and liquids are collected separately in one cassette. The product range includes seat units with separating function, cassettes with solids container and liquid tank, lids, conversion kits as well as a replacement model for Thetford bench toilets. The products are made of plastic; development began in 2021 with 3D-printed concepts. Since the market launch in April 2022, the components have been continuously further developed and presented at trade fairs such as the Caravan Salon. The website and product information appear bilingually in German and English.
- Processes
- Conversion kits for converting chemical cassette toilets (Thetford C220, C200, C250/C260, Dometic CT, Bench model as replacement for Thetford bench toilets, Complete Dometic separating cassette toilet (announced)
- Materials
- Plastic
- Industries
- Caravan/motorhome equipment, Camping
- 01
Design/Product development
- 02
3D printing/Prototyping
- 03
Plastics manufacturing
- 04
Assembly
- 05
Distribution via own online shop
Materials & Processes
Plastic
Material of the seat units, cassettes and conversion components for separating toilets.
Components




Inside the production




Industries
Additional services
History
- 2021
First concept – 3D prints
- 2022
Production status: seat unit (February)
- 2022
Market launch with the seat unit with separating function for the Thetford C250/C260 series plastic (April)
- 2022
Production status: seat unit & cassette (June)
- 2022
Production status: conversion kits & installation tips (August)
- 2022
Caravan Salon – impressions & feedback (September)
- 2023
Optimised seat unit, new cassette & more
- 2023
Caravan, Camping & Motorhome Show (UK) – impressions from the UK & status (February)
- 2023
Conversion instructions Thetford C220 conversion (March)
- 2024
Conversion in fast forward – Thetford C220 conversion (March)
- 2025
Caravan Salon – portfolio incl. Dometic separating cassette toilet (September)