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WRET: Water Recycling Eco Toilets

Off-grid toilets with a sustainable technology of treating and recycling wastewater during flushes

January 2022

WRET: Water Recycling Eco Toilets

Off-grid toilets with a sustainable technology of treating and recycling wastewater during flushes

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Label Date January 26, 2022
By WeCo
From France
Maturity stage TRL 9 / CRI 2 - Commercial Trial Small Scale

By combining the know-how developed with international research centers to the French design expertise, WeCo is offering the first ecological, off-grid and design flush toilets, solving the customer pains of wasting clean water for flushing and having yet no reliable nor sustainable water flush off-grid toilet. The toilet flushes operate in a closed circuit, treating and recycling the wastewater on-site, and require no connection to an external water network. WeCo enables the ecological transition of urban sanitation systems, especially in emerging cities where the sanitation solutions linked with strong urbanization are major issues. WeCo toilets can be plugged everywhere to any kind of toilet's environment and enable the clients to move them from a place to another easily, depending on the various needs.

The Environmental Benefits

  • WeCo is using 36 times less water than other toilets
  • 6,000L instead of 219,000L per year with all the comfort and security of wired toilets (for 100 daily flushes for 1 year)
  • The bacteria in the effluents are 99.99% removed within 2 hours, producing a drinkable water quality and ensuring that the water is bacteria and virus free, which is now essential with the pandemic risk
  • WRET Toilets are producing 10,950L of clean water (and 0L of wastewater) per year

The Financial Benefits

  • 2 to 5 times cheaper than regular public toilets as they do not need to be connected to the water network, with an average cost of 270K€/km of sewerage
  • WeCo wastewater treating, reducing and recycling technology, designed for a long-term autonomy (minimum of 3 months), do not need to be often emptied like chemical/dry/train toilets require (up to 27K€/y)

Target client profile



Activity Region

  • Headquarters
  • Activity

Company Profile


The First Off-grid Water Recycling Eco Toilets, treating and recycling the wastewater from the toilets, into flushes.

Type Company
View company profile Solution website

Networking Partner


ADEME - The French Agency for Ecological Transition- is a public agency under the joint authority of the Ministry for an Ecological Transition and the Ministry for Higher Education, Research and Innovation.

Solutions Associated 52
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator WeCo has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.