No water, no chemicals,
but 100 % comfort:

Arwinger
CassetteSeparationToilet

Umbausatz für
Thetford
C250/C260 Serie
Kunststoff

Wir suchen
Mechatroniker
Tischler
Fertigungsmitarbeiter
(m/w/d)

No water,

no chemicals,

but 100% comfort:

Arwinger CassetteSeparationToilet

The conversion set
for your Thetford chemical toilet

Wir suchen
Mechatroniker
Tischler
Fertigungsmitarbeiter
(m/w/d)

The conveniently emptied separation toilet

Independent

Ecological

Comfortable

The separation toilet with cassette

We love camping. And we love separation toilets. They are cheap to maintain, work without technology and are almost indestructible – the perfect companion for every long trip or short excursion. Not only do they work without expensive chemicals that are harmful to the environment and health, and do not create unpleasant odors, they also provide a decisive degree of independence when you are on the road. Since no water is used for rinsing, they do not have to be emptied so often, and a disposal station is not needed either.

But do you really have to carry full, open containers across the entire living and sleeping area of your mobile home to empty them? Even seasoned campers do not like to do that.

To make this unpleasant way unnecessary once and for all, we invented the Arwinger CassetteSeparationToilet – the separation toilet with a cassette to collect the solids and liquids. It can then be conveniently removed for emptying through the service flap. Of course, disposal itself remains as simple and environmentally friendly as with the classic separation toilet.

And the good news for all those who have a permanently installed plastic toilet from Thetford in their motorhomes or caravans: With our assembly set you can easily and professionally convert your chemical cassette toilet into a cassette separation toilet. We offer Arwinger CassetteSeparationToiletKits for the rotatable Thetford models. Thetford bench toilets can be replaced by our bench model.

The principle of the separation toilet is that solids and liquids are separated: Faeces fall into one container and urine is fed via a hose into another container. Neither chemicals nor water are needed for flushing; the separation toilet is therefore often also called a dry separation toilet. The faeces container is equipped with a bag, interspersed wood shavings, mulch or similar can be used additionally to bind moisture and residual odours. Due to the separation, no rotting process is set in motion and therefore there is no development of odours. The faeces can be composted or disposed of in the residual waste, the urine can be used as fertiliser or disposed of via the sewage system.

This is how it works

The upper part of the bowl of your chemical toilet is replaced by the Arwinger CassetteSeparationToiletKit seat part with separation function. The conversion can be done by yourself without specialist knowledge using the supplied instructions. The seat part ensures the separation of solids and liquids.

Both are picked up by the Arwinger CassetteSeparationToiletKit cassette, which is positioned in the service compartment and replaces the Thetford chemical cassette one-to-one. The solids fall into the cassette’s open container, which is fitted with a bag, and the liquid is fed into the cassette’s tank via the hose.

For emptying, both cassette parts can be separated. The tank for the solids has a volume of approx. 9 litres, the one for the liquid approx. 7.7 litres. The fill level of the liquid tank can be read with the help of an optical fill level indicator.

After the bowl conversion, the chemical toilet seat and lid are fixed to the new seat part and your Thetford toilet looks as good as before. You have made a separation toilet out of your chemical toilet without any damage to the fixtures or the sealing of your bathroom.

The separation toilet …

  • No water requirement

  • No chemicals

  • Independence from disposal stations

  • Longer emptying intervals

  • No chemical smell

  • Low repair susceptibility

  • No odour development

  • Easy disposal

… with cassette …

  • Convenient removal through the service flap

  • Hygienic handling

  • Clean transport

… as conversion set for your chemical toilet

  • Quick and easy self-conversion

  • Preservation of the appearance as well as the sealing in the bathroom

  • Professional, complete conversion kit

  • Preservation of the high-quality design, seating comfort and rotatability of the chemical toilet

  • Precisely fitting construction for your chemical toilet model

  • Complete deconstructability

Conversion in quick succession
March 2024

Thetford C220 conversion

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Conversion instructions
March 2023

Thetford C220 conversion

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Caravan, Camping & Motorhome Show
February 2023

Impressions from GB & status

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Update
Beginning of 2023

Optimised seat part, new cassette & more

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Caravan Salon
September 2022

Impressions & feedback

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Production status
August 2022

Conversion sets & installation tips

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Production status
June 2022

Seat part & cassette

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Production status
February 2022

Seat part

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The first concept
Beginning of 2021

3D prints

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Order the Arwinger CassetteSeparationToilet now!

Get your Arwinger CassetteSeparationToilet with a 200 € Easter discount.

The campaign runs from 18 March to 1 April 2024.

Complete

Arwinger CassetteSeparationToiletKit for Thetford C200 Series

€1,399.00

Complete

Arwinger CassetteSeparationToiletKit for Thetford C220 Series

€1,199.00

Complete

Arwinger CassetteSeparationToiletKit for Thetford C250/C260 Series Plastic Bowl

€1,199.00

Arwinger CassetteSeparationToiletKit seat part with separation function for Thetford C200 Series

€849.00

Arwinger CassetteSeparationToiletKit seat part with separation function for Thetford C220 Series

€649.00

Arwinger CassetteSeparationToiletKit seat part with separation function for Thetford C250/C260 Series Plastic Bowl

€649.00

The Cassette­SeparationToilet in bench format

Replacement

The new Arwinger CassetteSeparationToilet for the Thetford C400 and C500 Series also allows campers with a bench toilet in their vehicle to make a smart switch to a separation toilet – while retaining the bathroom design and the comfort they are used to.

As the inlay of the bench toilet cannot be removed, the entire toilet is replaced in this case. We have developed a body with corresponding dimensions into which the seat part with separation function is inserted. This replaces your Thetford bench toilet one-to-one. Of course, the toilet is still supplied from the outside through the service flap.

Due to the different individual installation situations of the original toilet, we recommend having the replacement carried out by us or one of our installation partners.

  • Complete replacement
  • Matching dimensions
  • Integrated Arwinger seat part with separation function
  • Arwinger separation cassette with operation via the service compartment
  • Made from high-quality ABS/PMMA plastic
  • Original Thetford C220 cover and seat
  • Reversible replacement

Arwinger CassetteSeparationToilet for Thetford C400 and C500 Series

€1,499.00

Arwinger CassetteSeparationToilet on tour

  • 13.-21.1.2024

    CMT

    Gallery Hall 1, Stand 61
    Fairground Stuttgart, Germany

  • 7.-11.2.2024

    Caravaning Hamburg

    Hall B5, Stand 237
    Hamburg Fair, Germany

  • 14.-18.2.2024

    f.re.e

    Halle B3, Stand 322
    Fairground Munich, Germany

  • 27.4.-5.5.2024

    Camping, Freizeit, Automobil

    c/o Carevan by MSR
    Fairground Bexbach, Germany

  • 30.5.-2.6.2024

    ABENTEUER & ALLRAD

    Stand Z110
    Exhibition grounds Bad Kissingen, Germany

  • 30.8.-8.9.2024

    CARAVAN SALON

    Hall 3, Stand E10
    Düsseldorf Fair, Germany

Installation partners

Camping pros about the Arwinger CassetteSeparationToilet

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100% NOUVEAUTÉ + TUTO ! Toilette sèche en conservant votre base du chimique !, Instant Camping-Car

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ARWINGER Kassetten-Klo-Umbau, Frank D. – Camping

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ARWINGER TRENNTOILETTE Erfahrungen – mein EHRLICHES FAZIT!, Sascha Ohde – Vanlife Adventures

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Review Arwinger droogtoilet – mijn eerlijke mening, DWvlogt

YouTube

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Cool European Products We Want from Dusseldorf 2023!, The Fit RV

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Van chemisch toilet naar compost toilet of droogtoilet, DWvlogt

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Using a separation toilet in your motorhome, Motorhome Matt

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Airwinger Cassette Toilet Conversion No Water No Chemicals, Caravan Escapades

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ARWINGER Separating Toilet Cassette Conversion Kit CCMS 2023, The Motorhome Miles

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Arwinger Umbausatz. Kassettentoiletten zur Trenntoilette 2023., GERMAN TELEVISION

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Tschüss Chemieklo Arwinger. Die Kassettentrenntoilette., RICHTUNG HIMMELBLAU

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Diese Trenntoilette sollte man prüfen. Arwinger Alternative?, WohnVan

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abf 2023 Hannover | Update zur ARWINGER Kassettentrenntoilette., CamperTobi

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TRENNTOILETTE | ARWINGER NACHRÜSTSATZ | WOHNMOBILE UND KASTENWAGEN, VanFan

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ARWINGER | THETFORD Toilette einfach zur KASSETTENTRENNTOILETTE umbauen | WAHNSINN | CMT 2023, DIHUTV

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CMT 23 – Umbausatz für die Chemietoilette – rückbaubar! – GENIAL!, upanddownvanlife

CMT 2023 – Zubehör-Neuheiten, reisemobil-international.de

CMT 2023: Neues Zubehör für Camper, campervans.de

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Caravan Salon Austria 2022 | Die ARWINGER Kassettentrenntoilette. | Die echte Alternative., CamperTobi

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Thetford Chemietoilette einfach zur Trenntoilette umrüsten | Umbau, Van Berlin

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Dieser innovative Trenntoiletten-Umbausatz für Thetford-Toiletten revolutioniert die Camperwelt!, Sascha Ohde - Vanlife Adventures

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Camping + Wohnmobil News und Neuheiten 5/22, Womo.blog

ARWINGER, Reisemobil International Nr. 5/2024

Arwinger – Umbau auf Trenntoilette, CamperVans Nr. 2/2024

Van chemisch naar compost, KAMPEERAUTO 1-2024

Alternatieven voor het chemisch toilet, KampeerKampioen Nr.01 2024

Separator toilet conversion kit, Waterways World, May 2023

Marine Toilet Troubles? Arwinger has the answer, Boating Business, May 2023

Arwinger – Sauber getrennt, CamperVans Nr. 2/2023

Besonderheit ARWINGER KASSETTENTRENNTOILETTE, Reisemobil International Nr. 7/2022

Customers about the Arwinger CassetteSeparationToilet

Great thing

We have now completed our first long vacation in Spain and have to say that we are extremely satisfied with the separation toilet and have no regrets about having converted it.

It’s a great thing.

Luitgard Grotjahn
Conversion Thetford C200, June 2023

Are really satisfied

We have been using your conversion for over half a year now and are really satisfied. As promised, everything works as we hoped. …

We can recommend the installation on site, the staff and coffee were great. Many thanks for that.

Peter Köhlenbeck
Conversion Thetford C260, March 2023

We won’t give it back

At this point, we would like to thank you once again for the advice and Leon for the quick and expert installation. Now we have used our holiday in Norway to test the toilet extensively. The first advantage we like is that the toilet can still be emptied from the outside, so we don’t have to carry it through the living room. My wife actually had to practice a bit until she had the right sitting position. … But it worked after a short time. The disposal is simply ingenious! First of all, we simply get by longer until disposal is needed, and then it gets lost in the normal daily routine. ….

We now just have more time to enjoy our holiday and that’s why we won’t give the Arwinger CassetteSeparationToilet back.

Brigitte und Achim Bäuerle
Conversion Thetford C220, July 2023

Top system, top quality and top service

The first use during a 6-week tour of France convinced us completely. Everything worked as intended and described. Odours really do not occur, or at most only to such a small extent that they are absolutely tolerable. The disposal intervals are now much longer and contribute greatly to the improvement of our self-sufficient camping with the motorhome.

The great service and advice of the Arwinger team led by Sven Mahn deserves special mention.

Herbert and Elke Billinger
Conversion Thetford C260, April 2023

The investment has paid off

I have had the Arwinger separation toilet (conversion kit for the Thetford 250/260) installed in my camper for several weeks now and I am very excited! … I have the new model and everything works great. … It is a great relief not to have to worry about disposing of the toilet contents!

In addition, the service at both Arwinger and Camping Wagner, where you can buy the toilet, is very good. … All in all, an investment that paid off handsomely and that I would always recommend!

Katharina Wohlberg
Conversion Thetford C260, June 2023

Are thrilled

First of all, a big praise for your conversion kits. We were able to convert our C220 without any problems and are thrilled with how well everything works.

Simon Gumbel
Conversion Thetford C220, May 2023

Recommend with a clear conscience

We are totally satisfied with it. The installation also worked without any problems. Conclusion: Autohaus Nees is highly recommended. We can also recommend their toilet to anyone with a clear conscience. We are glad that we did not choose another toilet.

Antoinette Kleinhans
Conversion Thetford C200, May 2023

At least 5 stars

We would like to take this opportunity to thank Björn once again for the trouble-free process and installation. We have rarely experienced such a friendly and competent employee as Björn. It was a pleasure to see someone like him at work. Many greetings to him again and many thanks.

The 3-day test drive with the separation toilet absolutely confirmed our decision to switch to this principle. All in all, we give you at least 5 stars.

Günther Wurl
Conversion Thetford C260, April 2023

Are very satisfied

We were happy to give positive feedback after our holiday. Really great and practical as promised, we are very satisfied!

Claudia Lerner
Conversion Thetford C260, April 2023

Certainly not build back

A few months ago, we replaced the Thetford C220 with the Arwinger cassette separation toilet in our van. The exchange was easy, quick (only the new “bowl” needed to be clipped in) and did not destroy the existing toilet. With the cassette separation toilet, we are much more mobile (because solid waste can be disposed of in the residual waste and urine can be dumped down the drain almost anywhere), more sustainable (because compostable disposal is also possible and no chemicals are used) and more self-sufficient (longer replacement intervals, especially for solid waste). My wife and I will certainly not build back (although that would be possible).

Peter Janetschke
Conversion Thetford C220, April 2023

Frequently asked questions

So far, conversion sets are available for the Thetford C250/C260 Plastic Bowl, C220 and C200 series. It is also possible to convert the Thetford C260 Ceramic Bowl series. However, this requires the ceramic bowl to be replaced with a plastic bowl.

The Arwinger CassetteSeparationToilet for the Thetford C400 and C500 Series bench toilets is on the market since the beginning of April 2024.

A conversion kit for the Dometic 4110 is currently under development. We are not yet able to provide a specific date for the market launch.

The cassette consists of separate containers for liquid and solid, which are connected with a tension belt. Both are conveniently removed through the service flap and can be separated for emptying.

The solids container has a volume of approx. 9 litres, the liquid tank approx. 7.7 litres.

A bag is hung in the solids container, which is completely removed for emptying. This prevents soiling of the container. We recommend using a compostable bag or a bag made of recycled material.

Any material that is suitable for binding moisture can be used as bedding. Small animal litter, sawdust, miscanthus, completely dried coffee grounds or special separation toilet litter have proven to be effective.

We recommend cleaning the seat section regularly with a little vinegar water (mixing ratio 1:1) or citric acid water (3 tablespoons of citric acid to 1 liter of water). After a longer period of intensive use, the hose and the liquid tank can be rinsed with vinegar or citric acid water.

The liquid tank is completely closed; the liquid is only fed in through a small opening and emptied through a closable spout. The solids container is not closed with a lid. Since only the bag is removed for emptying, i.e. the container does not have to be transported, a lid is not necessary here. In addition, the drying of the solids is supported by the fact that the container is open at the top.

Due to the demand for a screen for the solids container, we will be offering a solids cover from the first quarter of 2024. It is inserted into the solids outlet when the toilet is not in use. Before using the toilet, it is removed and placed in the holder provided.

The level of the liquid tank is read by means of an optical level indicator on the cassette. From the first quarter of 2024, there will be an electric level indicator that can be purchased as an option.

Basically, a dry separation toilet hardly produces any odours. Odours are only created by the combination of solids and liquids, which does not take place here. And of course there are no chemical odours either. However, you can continue to use your existing ventilation and/or your ventilator in the service flap. If a ventilation is wanted, we recommend the SOG TT.

The Arwinger CassetteSeparationToilet does not work according to the concept of mixing the solids and therefore has no agitator.

In principle, the conversion can be carried out by the customer themselves. Only a little manual skill is required. However, we also offer installation in our hall in Hamburg Langenhorn, for which we charge €150.00. Otherwise, we have a number of trained installation partners in Germany and neighboring countries that you can contact. You can find an overview of all our partners at www.arwinger.de/en/#installationpartners

Our original conversion concept envisaged sawing off the bracket for the closer of the original toilet. Since the wish was expressed to be able to completely dismantle the toilet, we have developed a solution here: A silicone sleeve on the lower edge of the seat section provides a flexible extension that goes over the closer bracket. It is therefore not necessary to remove it.

Yes, the seat can still be turned after the conversion.

We also offer to order the seat part with separating function individually, i.e. without the cassette. If you choose not to use the cassette, you can collect the solids with a bucket and direct the liquid via the supplied hose into a canister or an underground tank.

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