Toilet Tech offer two systems for solid waste management: Decompose and Waste Away. Both systems are designed to minimize volume of solid waste collected in the backcountry, thus reducing costs and maintenance. The Decompose system best suited is for sites with soil and vegetation. It achieves a 95% reduction in mass and volume of waste compared to standard vault toilets. The Waste Away system is for extreme environments such as the alpine or desert and achieves a 75% reduction in mass and volume of waste compared to standard pit toilets.


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, who developed these systems himself.


Billings MT Forest

In the Decompose system, after the Behind the Wall 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.

Benefits: Lowest residual waste volume with onsite storage capacity of 10-20 years

Drawbacks: Requires excavation into soil, 2-4' below grade

Site Suitability: Forests, campgrounds, sub-alpine, remote parking lots, some front country sites

Info Package: Decompose information package

Compatible Seats: BTW Urine Diversion Seat

Compatible Vaults: Decompose Vault (DCV)

Compatible Structures: All

Specifications Sheet: Decompose specifications single-stall ADA PDF

Reference Letter: Mark Ortega, Glacier Bay National Park 


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. 

Benefits: No-touch collection system. Easy storage, removal and disposal.  

Drawbacks: Waste is not decomposed and requires disposal (landfill, incineration, WWTP)

Site Suitability: High elevation alpine or extreme desert locations

Compatible SeatsBTW Urine Diversion Seat

Compatible VaultsWishbone's Waste Away Containment

Compatible StructuresWishbone, Wilderness WishboneCustom

Specification SheetWaste-Away Single Stall Specifications PDF