Non-Liquid Systems

NSF/ANSI 41 certifies composting toilets and similar treatment systems that do not use a liquid saturated media as a primary means of storing or treating human excreta or human excreta mixed with other organic household materials.

The standard requires a minimum of six months of performance testing, which includes design loading and stress testing appropriate to the product class: residential, cottage or day-use park. We evaluate a minimum of one system in a controlled laboratory setting, and a minimum of three systems in a mature field setting.

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