Sun-Mar Centrex 2000 NE Toilet Composter


  • 4-6 Residential/Continuous Use
  • 7-9 Weekend and Vacation Use
  • Use with 1 pint flush toilet
  • Does not include toilet: Composter Only
  • Flat $250 Shipping in US 48 contiguous states.
SKU: SM-CENTREX-2000-NE Categories: , , Tags: ,


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:

Great for medium to heavy seasonal or light residential use, the Centrex 2000 allows for both a longer composting cycle, and larger waste volumes than the 1000 models. The Centrex 2000 NE (Non-Electric) is the non-electric version of the Centrex 2000 which is fitted with a 4″ vent stack. Installation of a 12 Volt fan is optional, but it is recommended for heavy seasonal, residential use, or where the installation is particularly subject to downdraft, being surrounded by high trees or hills. We also recommend the fan if you need to install a bend in your vent stack

When used seasonally by up to 7-9 adults, compost will normally only need removing annually each spring. In residential use compost will have to be extracted more frequently. When used residentially by up to 4 adults, some compost will need to be emptied into the finishing drawer once every few months.

  • 4″ vent stack, for proper ventilation
  • Waterless Kit also available; requires purchase of a SUN-MAR dry toilet.
  • The Centrex 2000 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 2000 may be used with one or more Sealand low flush toilets, purchased separately.
  • Picture shows toilet, but is not included.

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

Weight120 lbs




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