Composting Toilets

Filter & sort

Waterless toilets that separate liquids from solids, so they need no water, no chemicals and no hookup. Trelino Evo and Origin toilets in three sizes, with the canisters, bags, fan sets and spare parts that go with them. For vans, RVs, boats, off-grid cabins, garden offices and tiny homes.

17 Products

Showing 12 of 17 products

Which one should I buy?

A separating composting toilet keeps liquids and solids apart: urine goes forward into a canister you pour out, solids drop into a lined container with a scoop of litter and dry. No water, no chemicals, no black tank, no hookup. It is the right buy for a van, a boat, an off-grid cabin, a garden office or a tiny home where plumbing is not an option.

Pick by space and by how many people use it. The Evo S and Origin S are the compact ones for a van or a tent. The M sizes add capacity and a taller seat for a Sprinter or a truck camper. The Evo L and Origin L sit at household height with 2.6 gallon containers for an RV, a cabin or a tiny home.

Evo is the lighter ABS line with a soft-close lid in white or dark gray; Origin has a polyethylene body and a birch wood lid. Add a spare canister, bags and, on the M and L, the SOG fan set for long trips.

How the separator works and which size fits explains the rest.

Ordering from Rein Water

What to expect

  • Ships direct from the manufacturer

    Every order is packed and shipped by the brand that makes it. We submit your order to them within 2 business days.

  • Estimated delivery on product pages

    Brondell, Crystal Quest and Waterdrop product pages show a dated delivery window under the buy button before you order.

  • Returns by brand

    Each manufacturer sets its own return window and restocking fee. Check the terms for your brand before you order.

    Return terms by brand
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    We email your tracking number within 1 business day of the shipment leaving the manufacturer.