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CENTREX 2000 High Capacity Electric Central System (Water Flush)
Centrex 2000 high capacity central system composting toilet by Sun-Mar

Toilet fixtures sold SEPARATELY.

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Product Code: CENTREX_2000
Our Price: $2,450.00

Availability: Usually Ships in 1 to 2 Weeks


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How to Operate the CENTREX 2000
Product Features
Technical Specs
Return Policy
Customer Reviews For This Product

If you have an accessable space below your bathroom, and are looking for a green system that is traditional looking, the CENTREX Central systems may be a great fit for you! You will want to note that the central systems only include the composting unit and not the toilet fixture. You must purchase the toilet fixtures to be installed in the bathroom separately.

With a 50% larger Bio-Drumô, than the CENTREX 1000 series, the CENTREX 2000 family is set up for medium to heavy seasonal use or light residential use. This electric, low flush central system requires plumbing connections for water and a constant supply of electricity. The electrical features of the CENTREX 2000 include a thermostatically controlled heater which warms and evaporates liquid, and a fan assembly that maintains a partial vacuum within the unit, ensuring odorless operation.


All units in the CENTREX 2000 family have been tested by the National Sanitation Foundation (NSF) and are certified to comply with NSF-ANSI Standard #41, the only North American performance standard for composting toilets. This testing and certification guarantees odorless operation and production of a clean, dry compost that is safe and sanitary. Visit the NSF website to see the CENTREX 2000 family's NSF Certification Listing.

How to operate the CENTREX 2000:
  • When you initially start to use your unit, you will need to add some Compost Sure Blue (hemp stalk bulking material) into the Bio-Drumô with some Microbe Mix.
  • You may use any toilet paper you want; the composting toilet will compost all types without a problem.
  • While the unit is in use, daily, add a cupful of Compost Sure Blue per person. Then every 2-3 days (while unit is in use), you will need to rotate the drum 5 or 6 full revolutions. For short periods such as weekend use, just rotate before you leave at the end of the weekend.
  • Some of the compost should be moved to the finishing drawer when the Bio-Drumô is half to 2/3 full. This is accomplished by simply releasing the drum lock and rotating the drum backwards. Then the finished compost drops automatically into the finishing drawer. This quick process takes less than a minute and does not require you to come in contact with fresh material.
  • Compost should be left there for at least 4 weeks so it can finish and sanitize. It will be isolated from contamination by fresh material in the toilet. After the 4 weeks have passed, you can remove the finished compost from the finishing drawer at any time. The drawer can be easily pulled out by hand, without the need for tools.
  • Then add it to your flower garden! The finished product is clean, dry, non-offensive, and sanitary. It will look and smell just like any other regular compost that might come out of a garden composter.

  • This is a central system electric unit that uses water
  • It requires one pint low flush toilets, which are SOLD SEPARATELY
  • The patented Bio-Drumô provides composting capacity for 7 adults (weekend use) or 4 adults (residential and continuous use)
  • NSF tested and certified for a continuous 6 months at maximum rated capacity (click here to view NSF certification)
  • Electrical features include a thermostatically controlled heater in the base of the unit to warm and evaporate excess liquid and a fan assembly in the top of the unit that maintains a partial vacuum to ensure odorless operation at all times
  • All Sun-Mar units feature 3-chamber technology:
    • The patented Bio-Drumô, where compost is mixed and aerated
    • The Evaporating Chamber, where excess liquid is evaporated
    • The Finishing Drawer, where finished compost is kept separate from unfinished material

Technical Specs:
  • Designed for use with one pint low flush toilets, SOLD SEPARATELY
  • More than one toilet can be installed on the CENTREX 2000 system because the capacity limitation is based on the number of people using the system rather than the number of toilets
  • View Dimensional Line Drawing
  • View Product Instruction Manual
  • Composting Capacity:
    • Residential & Continuous Use: 4 Adults or a Family of 6
    • Weekend & Vacation Use: 7 Adults or a Family of 9
    • Please note, family numbers above include both adults and small children
  • Electrical:
    • Max Amps (with heater on): 3.6
    • Fan Watts: 35
    • Heater watts (when thermostat switches it on): 370
    • Average Power Use in Watts (heater on 1/2 time): 200
  • Vent & Drains:
    • Vent Pipe: 2" Cent. Vac. tubing
    • Drain: 1" O.D. (Note: drain hookup is required on this unit)
  • Dimensions:
    • Unit Dimensions: 45-1/2" W x 27" D x 28" H
    • Width required to turn handle: 49"
    • Shipping Carton Dimensions: 47" L x 28-1/2" W x 30" H
  • Rough-in Measurements:
    • Depth required to remove finishing drawer: 45"
    • Note: Waste inlet is the "collar" at the top of the unit that the toilet drain connects into
    • Height from base of unit to bottom of waste inlet assembly: 27-3/4"
    • Height from base of unit to top of waste inlet assembly: 31"
    • Height of waste inlet assembly: 3-1/4"
    • Diameter of waste inlet (including flange): 3" DWV
    • Vent inlet center distance from rear of unit: 11"
    • Vent inlet center distance from left side of unit: 12"
    • Height to center of vent outlet assembly: 23-1/2"
  • Unit shell is constructed of durable fiberglass and ABS plastic
  • Product Weight: 97 lbs.
  • Shipping Weight: 118 lbs.
  • This product ships via common carrier truck line from Tonawanda, New York
  • Limited Manufacturer's Warranty:
    • 5 Years on shell
    • 3 Years on all other parts
    • For complete details, please see our Warranty Information page

Return Policy:
Please note, there is a 20% restocking fee on all returns of this item. For complete details, please see our store Return Policy page.

NOTE: Free Ground shipping for contiguous United States (lower 48 states) only. Sorry, we do not ship outside the contiguous United States (lower 48 states).

Model: Centrex 2000, installed 2003
Location: Installed at "Big Bucks Lodge" Alma, NY
Reviewed By: Mike & Sue Wohleban, and Douglas & Cyndy Walid

We installed the Centrex 2000 last fall and just moved the compost to the finishing drawer a year later. The unit works better than we expected. Our camp is on a hill and the cost of a septic system was in the $8000.00 range. We use our camp every weekend and for extended weeks in the summer and fall. The unit performs perfectly with no odor and with the 510 toilet, very little water. We installed the unit in a couple of hours. The instructions were precise and easy to follow. Thanks for making our camp a place we can enjoy for years to come.

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