Clesana C1 Waterless Toilet – Revolutionary Cassette Toilet Replacement

The Clesana C1 is a breakthrough in mobile sanitation that replaces your traditional cassette or chemical toilet with a flexible, reliable, and eco-friendly solution. Designed and made in Switzerland, this innovative unit uses a unique thermo-pressure sealing process to encapsulate waste in a hygienic multi-layer barrier film. No flushing water, no chemicals, and no black water tank are required – waste is heat-sealed into an odor-proof bag for easy disposal. The result is a clean, odorless, and hassle-free toilet that meets medical-grade hygiene standards while eliminating the mess and inconvenience of cassette toilets. If you’re looking to upgrade or replace a Thetford cassette toilet, the Clesana C1 offers a drop-in solution that fits common Thetford C220/C260 installations with minimal modification , giving you a modern, waterless toilet without the usual drawbacks.

Key Features & Benefits

• Waterless & Chemical-Free: Completely dry flush operation – no fresh water or chemical additives needed . You save water and avoid handling toxic chemicals, making camping more eco-friendly and convenient. (No more “blue fluid” or flushing hassles!)

• Odorless, Hygienic Operation: Each use is sealed into a airtight foil bag within ~60 seconds , locking away odors and germs. The C1’s patented sealing mechanism meets medical hygiene standards, so once waste is sealed, nothing can leak or smell . Your bathroom stays clean and sanitary with no lingering odours even after long drives .

• Easy Disposal: Instead of dealing with a foul cassette or finding a dump station, you simply remove the collection bin and toss the sealed waste bags in the regular rubbish when convenient . The sealed pouches are safe to handle (no contact with contents) and can be disposed of as household waste where permitted . This means no more emptying smelly tanks at campsite facilities – a huge relief for many users!

• Freedom & Off-Grid Independence: The Clesana C1 makes you independent from fresh water and disposal stations . You can camp off-grid or park up for longer without worrying about filling a water tank or emptying a cassette. It’s immediately ready to use even after long storage periods and requires no winterizing or antifreeze, since there’s no water to freeze . Whether on a remote campsite, a boat, or an overland trip, you have one less system to maintain.

• Compact & Comfortable: The unit is compact enough for small camper bathrooms, yet provides a standard seat height (~478 mm) for comfort . Its footprint is similar to common cassette toilets (about 51.5 cm tall, 36.3 cm wide) and can fit in layouts designed for Thetford toilets . Despite the high-tech function, using the C1 feels just like a normal toilet – simply close the lid and press a button to “flush,” and the system automatically does the rest .

• Low Maintenance: Say goodbye to scrubbing cassette tanks and messing with dump chemicals. The C1 has minimal upkeep – no valves or tanks to clean, and no venting or hose plumbing needed. Regular maintenance mainly involves replacing the barrier film cassette roughly every 30–40 uses and a Teflon sealing band after ~1,500–2,000 cycles . There’s no need for winter shut-down procedures either . Routine cleaning is as simple as wiping the bowl (since it’s lined with fresh film each time, the bowl stays much cleaner and doesn’t develop scale or odors).

• Versatile & Multi-Purpose: The C1 isn’t just for human waste – its robust sealing bags can securely contain nappies/diapers, pet waste, feminine hygiene products, or even food scraps if needed . This adds extra convenience for families with infants or pet owners on the road. The system is quiet and discreet, making it suitable for nighttime use or sensitive environments.

• Eco-Friendly Solution: By eliminating water use and chemical dumping, the C1 significantly reduces environmental impact compared to traditional RV toilets . You conserve water (a critical resource when camping) and avoid releasing chemically treated waste into the environment. Clesana’s barrier film technology was originally developed for medical and environmental projects to prevent pollution , so you can trust its sustainable design. In short, waste tanks and cassette toilet pollution become obsolete with the C1 .

How It Works

Using the Clesana C1 is straightforward and similar to a home toilet experience, minus the water. After lifting the lid, you use the toilet normally (you can even add an absorber powder for liquids if desired). When finished, simply close the lid and press the flush button – there are two buttons to choose a “large” or “small” flush cycle as needed . The C1’s internal mechanism will then automatically seal the waste into a section of the liner film and cut it, creating a completely closed bag. The waste bag drops into an internal collection drawer, and at the same time the bowl is immediately lined with fresh, clean film for the next use . The whole sealing cycle takes only about a minute , and an indicator on the control panel counts the uses and shows when the liner is nearly full. When you’ve reached ~30–40 uses (the capacity of one foil cassette), you simply open the C1’s drawer, pull out the string of sealed bags, and dispose of them just like a garbage bag – never touching any waste or smelling anything unpleasant . After inserting a new roll of barrier film, you’re ready for dozens more trouble-free uses.

Power: The C1 runs on a 12‑V DC supply (the standard in campers) and consumes very little energy per flush. A typical sealing cycle uses only around 1.7 Wh of energy (plus ~0.5 Wh for the welding step) – which is equivalent to a few minutes of a light bulb. The peak current draw is about 22 A at 12 V during the few seconds of sealing , making it easy to run from a leisure battery or power system. In standby, it draws virtually negligible power (around 0.3 W) . This efficient power profile means the C1 can operate for extended periods off-grid without draining your battery, and it’s safe to use with solar+battery setups or in vehicles while driving. There’s no 230V mains needed (though an AC adaptor can be used if you want to run it from shore power).

Installation Options: L-Adapter vs Round Base

The Clesana C1 is available in two mounting configurations – with an L-Adapter or with a Round Base – so you can choose the version that best fits your vehicle or installation scenario. Both versions function identically as toilets; the difference lies in how the unit is mounted and how it can cover any existing openings from a previous toilet:

• C1 with L-Adapter: This version is ideal for replacing built-in cassette toilets, such as the popular Thetford models found in many caravans. The L-Adapter is a special mounting bracket that attaches to the back of the C1, allowing it to bolt against a wall and cover the old service hatch opening left by a cassette system . In fact, the C1 with L-Adapter has the same layout and dimensions as a Thetford C220/C260 series cassette toilet, making for an almost plug-and-play retrofit . The L-Adapter piece seals off the exterior door where the cassette used to be (it even comes with a rubber lid to ensure a tight closure of that opening) . When installing, you’ll simply cap off the old water supply line (since the flush water is no longer needed) and slide the C1 in place of the cassette—no extensive carpentry or plumbing changes required. For many RV owners, this is the easiest way to upgrade: you get to use the same bathroom space and gain all the C1’s advantages without a major renovation. The C1 with L-Adapter does have a slightly larger depth footprint (about 516 mm deep) to accommodate the wall adapter , but this usually matches the depth of the original cassette compartment. If your existing toilet is a bench-style or against the wall, the L-Adapter version is likely the best choice for a seamless fit.

• C1 with Round Base: This configuration mounts the toilet using a floor pedestal (round base) instead of the L-shaped wall adapter. The Round Base variant is perfect for new installations or free-standing placements – for example, converting a van that didn’t previously have a built-in toilet, or putting the C1 in a boat or tiny home. The round base lets the C1 sit securely on the floor as an independent unit , so you have flexibility in where you position it (it doesn’t have to be against a wall). Because it doesn’t include the rear adapter, the Round Base model has a slightly shorter depth (~461 mm), which can be helpful if space behind the toilet is limited . If you are retrofitting the C1 into a vehicle that had a cassette toilet, you can absolutely use the Round Base version as well – just be aware you’ll need to close off the old external service door separately, since the round-base C1 won’t cover it. (Many people simply install an access hatch cover or leave the old door in place but sealed shut.) Functionally, the C1 works the same with either base. Both the L-Adapter and Round Base allow the toilet to be rotated up to 180° on its mounting disc, so you can orient the seat for your space . In summary, choose L-Adapter if you’re directly swapping out a wall-mounted cassette toilet (for easiest conversion), or choose Round Base if you need a standalone floor mount or have a custom placement in mind.

A New Level of Convenience and Cleanliness

The Clesana C1 truly redefines what an RV toilet can be. By eliminating the need for water hookups, cassette removal, and chemical treatments, it solves many of the biggest headaches of motorhome sanitation. No more smelly cassette to empty, no more rushed trips to the dump station, and no more flushing away gallons of precious water. Instead, you get a self-contained, hygienic system where waste is cleanly packaged and disposed of on your schedule . Campers who switch to the C1 quickly appreciate the difference – the bathroom stays odor-free and germ-free, maintenance is minimal, and you can travel with much greater freedom. It’s an especially great upgrade for families (no worrying about the cassette filling up after a day or two) and for off-grid adventurers who want to camp in remote spots without sacrificing comfort.

In short, the Clesana C1 offers all the comfort of a home toilet, anywhere you go, without the usual RV toilet troubles . It’s a modern, sustainable alternative that makes conventional cassette toilets obsolete . If you’re ready for a cleaner and easier bathroom experience in your caravan, campervan, boat, or tiny house, the Clesana C1 is the cutting-edge solution that delivers on its promise. Upgrade your travels with this waterless toilet, and enjoy true independenceand hygiene on the road! 🚐🌟