Sun-Mar Centrex 1000 Composting Toilet System


  • 120V electric composting toilet
  • Single Person Residential/Continuous Use
  • 5-7 Weekend and Vacation Use
  • Use with a single Sealand toilet
  • Flat $265 Shipping in US 48 contiguous states.


Sun-Mar Centrex toilets are designed with a central composting unit, and a separate toilet bowl. They’re easiest to use in a cabin or home where the toilet and composter can be installed on separate floors, so the toilet has sufficient clearance for the waste pipe to easily empty into the composting chamber. Unlike self-contained composting toilets, Centrex systems allow you to locate the composter outside the living area of your home, allowing you to use a more “normal” looking toilet unit.

About this model:

The Centrex 1000 is designed for weekend/light seasonal use or in a single person’s home. With light seasonal use by up to 5 adults, or a family of 7, compost will normally only need removing annually each spring. In residential use compost will have to be extracted more frequently.

The Centrex 1000 features a 260 watt thermostatically controlled heater in a sealed compartment under the unit and the standard Sun-Mar 25 watt turbo fan, with a 2″ vent stack to remove evaporating liquid and fresh odors.

  • AC/DC kit available to enable use with 12V DC.
  • The Centrex 1000 is supplied with a 1″ drain hose which should be connected to the 1″ drain at the bottom of the unit. See Sun-Mar for more information on handling excess liquid.
  • The Centrex 1000 is used with a single 1 Pint Flush toilet.
  • Add a 13″ or 17″ toilet bowl to complete the Centrex 1000 kit.

Necessary Accessories: (You can add these items to your cart from the Related Products tab, above.)

  • Compost Sure Blue: Hemp stalk compost bulking material. Add some when you initially start using the toilet, and then add one cup per person/per day of use.
  • Microbe Mix: Microbes and enzymes necessary for proper composting. Add some when you initially start using the toilet, and then add one scoop every two weeks of use.
  • Compost Quick: Compost accelerating enzymes that keep your drum clean and assist aerobic decomposition. Spray the drum liner before you start using the toilet, and again each time the drum is emptied.

FLAT RATE SHIPPING OFFER DETAILS: The flat rate shipping offer applies to Sun-Mar toilets drop-shipped from Sun-Mar, to addresses within the contiguous 48 United States. Flate rate shipping is via ground freight service only. If your shipping address is outside the contiguous 48 states, or you need faster delivery, we will provide a shipping quote for your approval prior to processing your payment.

NOTE: Toilet orders are shipped directly from Sun-Mar. Lead time will vary, up to 4 weeks. If you need your order by a certain date, please email your requirements to so we can check lead times before you place the order.

Additional information



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