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
- Never charge the battery below 0°C or above 40°C (32°F-104°F). Charging outside this range causes hidden damage that only shows up later.
- 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
Changed your mind? Send it back unused, in its original packaging, within 30 days for a refund. Return shipping comes out of your refund. We'll send you a prepaid label, so there's nothing to pay up front.
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.
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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.
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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.
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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.
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The urine bottle holds 1.7 gallons. For two people you will empty it every 1-2 days. The LED indicator tells you when.
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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.
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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.