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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.

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