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Designed for forests, grasslands, and other vegetated environments. Reduces waste mass by 95%.

Waste Away

Designed for environments with little vegetation such as alpine or desert. Reduces waste mass by 75%.


Urine diversion is the key component of both toilet systems and is the reason Toilet Tech's systems are able to achieve such high waste volume reduction. Check out our Behind the Wall Toilet page to find out how it works, or watch this overview video narrated by the founder of TTS, Dr. Geoff Hill.



  • Lowest residual waste volume

  • Onsite storage capacity of 10-20 years

  • Suitable for forests, campgrounds, sub-alpine, remote  parking lots, some front country sites

Product Sheet: Decompose Vs. Waste Away

Reference Letter: Mark Ortega, Glacier Bay National Park 

In the Decompose system, after the Behind the Wall (BTW) urine-diverting toilet seat separates liquid waste from solid, the solid waste drops into an open-bottom vault in connection with the earth. This vault is called the Decompose Vault (DCV), because this is where solid waste is consumed by invertebrates in the soil. Urine is diverted into a shallow septic field for onsite treatment. This urine diversion system evolved out of Toilet Tech's founder's PhD research.


The Waste Away system also utilizes the BTW urine-diverting toilet, but instead of an open-bottom DCV, solid waste is collected in structural bags or bins for hassle-free removal. The Waste Away toilet has replaced dozens of high-use high-alpine helicopter fly-out toilets including all the high camp toilets at Mt. Rainier National Park, Longs Peak in Rocky Mountain National Park, and Zion's Angel's Landing trail. Waste can be collected in bags small enough for llamas to carry (as is done on Longs Peak) or in large 1 cubic yard stiff sided haul sacks. A single large tote bag can capture the waste of up to 10,000 toilet users per year. Download our planning and sizing guide to learn more. 


  • No-touch collection system.

  • Easy storage, removal and disposal.

  • Suitable for high elevation alpine or extreme desert

Product Sheet: Decompose vs. Waste Away

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