Composting Toilet System

Composting and urine-diverting toilet systems for off-grid cabins, tiny homes, RVs, and seasonal properties without a conventional septic connection — including the Sun-Mar CenTrex and Excel lines and Separett's Villa and Tiny models.

Central composting systems (like the Sun-Mar CenTrex line) separate the toilet fixture from a larger composting unit installed elsewhere, suited to full-time residential use. Self-contained and urine-diverting units (like the Separett Tiny) are more compact and better suited to smaller spaces or part-time, seasonal use.

Sizing depends on how many people will use the system full-time — check each model's rated capacity before choosing.