The world's first
S1 Dry Flush Sealing Toilet
$1,500.00 USD
Push a button. Waste is heat-sealed automatically. Urine diverts separately so you only bag what you actually need to. No composting. No layering. No process. Just clean, odor-free off-grid living.
Key Product Highlights:
- Urine-diverting = Odor-free: liquids and solids never meet. No sewage. No smell.
- Automated heat-seal: push a button and solids are hermetically sealed in a bag. No manual wrapping. No exposure. No "eww" moment.
- 20+ seals per charge: rechargeable Li-ion battery powers the sealer. No mains power, no wiring, no venting needed.
- Choice of bags: compostable for eco-conscious users, recycled plastic for longer storage. You're not locked in.
- Waterless and chemical-free: no blue juice, no enzymes, no plumbing. Just separate, seal, and go.
- S1 Dry Flush Sealing Toilet
- Manual
- Sealing Unit
- Solids Bin
- Urine Bottle with one-way valve
- Power Adapter
- Compostable Liner
- High Barrier Liner
- Battery Box
- Bag Pusher
- Dimensions: D X W X H: 17.0" x 15.2" x 16.5"
- Solids Container Capacity: 1.5 gallon (5.7 liter)
- Urine Bottle Capacity: 1.7 gallons (6.4 liter)
- LED Urine Level Indicator: An LED light alerts users when the urine bottle is full.
- Material Composition: ABS plastic body, stainless steel hinges, waterproof connectors
- Weight: Approx. 29 lbs (13.2 kg)
- Portability Features: Sturdy side handles for effortless transport
- NOTE: Please be aware that the S1 Dry Flush Sealing Toilet Cannot be powered via the USB Power Cord
- NOTE: For the most up-to-date information. Please refer to the Manual
Delivery
Free shipping on orders over $150 in USA 48 and Canada.
Canadian orders ship from our 3pl in Canada.
Deliver Time is estimated 3-5 days depending on location. We use UPS ground at standard in USA - No PO Boxes.
Returns
No problem if you change your mind! We make returns super easy by covering the cost and offering a full refund if you're unhappy for any reason within 30 days of receiving your S1 Dry Flush Sealing Toilet, as long as you haven't used it and return it in the original packaging.
Return Policy
Bamboo Seat Cover
$125.00
S1 12V Vehicle Charging Kit
$25.00
2-Pack S1 Bag Liner Refill
$35.00
Title
Title
Separate
Separate
Heat Seal
With the push of a button the automatic sealing mechanism hygienically seals solid waste
Hassle Free Disposal
The S1 seals each #2 in a small bag, making it easier to empty whenever you want.
Super Simple
Four steps easy steps.
Common Questions
Straight answers only.
-
Traditional dry-flush toilets bag every single use — liquid and solid together. You burn through expensive proprietary refills fast, and you're effectively paying to seal urine in plastic.
The S1 diverts liquid into a separate 1.7-gallon bottle and only seals solids. That's up to 80% less bag use, dramatically lower running costs, and far less plastic waste. It's the first dry-flush toilet with urine diversion built in.
-
The S1 uses two separate batteries: one for the sealing mechanism and one for the urine level indicator.
1. Sealing mechanism battery
The sealing mechanism runs on the included rechargeable Li-ion battery.
- Charging: Connect the supplied 12V power supply unit (Input 100–240VAC, Output 12VDC/2A) to the power input socket at the back of the toilet.
- Powering on: Use the power switch on top of the battery box.
Safety warnings
- Fully charge the battery before first use.
- Only use the CompoCloset-approved charger.
- Do not connect the power input directly to a source exceeding 12.6V, such as a vehicle alternator or a LiFePO4 battery. For those, use the CompoCloset Li-ion 10–24V DC charger. [See Here]
2. Urine level indicator battery
The indicator light needs its own 9V battery, which is not included.
- Installation: Remove the two screws on the battery box and fit a fresh 9V battery.
-
Each liner roll gives ~25 uses. For 2 people with regular use, that's roughly every 1–2 weeks. Swap takes under a minute — no tools, no mess. Refills are available on CompoCloset.com and Amazon Prime.
-
The urine bottle holds 1.7 gallons. For two people you will empty it every 1-2 days. The LED indicator tells you when.
-
Good news — you don't need to buy the full S1. The S1 Dry Flush Adapter Kit converts your existing Cuddy or Cuddy Lite into a sealing toilet. Plug-and-play, no permanent modifications required.
-
The S1 has a built-in backup mode — it converts to a standard urine-diverting toilet if you run out of bag liners. You're never left without a working toilet.