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Central Composting Toilet Systems

Central composting toilet systems offer a more traditional-looking toilet in the bathroom that is connected to a central composting chamber, typically located in a basement or outside. These units can typically handle more waste than a self-contained composting toilet, and multiple toilets can be connected to the central composting chamber.

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If you are unsure about your composting toilet needs, don’t hesitate to call the Real Goods Tech Desk at 800-919-2400.


"Where the composting chamber is separate from the toilet, the slope of any horizontal waste pipe run is critical. The standard 3-inch ABS pipe needs to have ⅛" to ¼" of drop per foot of horizontal run."

Solar Living Sourcebook 14th Edition
Chapter 10: Composting Toilets and Greywater Systems

Central Composting Toilets from Real Goods