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

Toilet fixtures sold SEPARATELY.

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Product Code: CENTREX_2000_ACDC
Our Price: $2,575.00

Availability: Usually Ships in 1 to 2 Weeks


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How to Operate the CENTREX 2000 AC/DC
Product Features
Technical Specs
Return Policy

The CENTREX 2000 series feature a Bio-Drum™ that is 50% larger than the CENTREX 1000 series units. Therefore, the CENTREX 2000 AC/DC unit handles medium to heavy seasonal use or light residential use. .

This low flush central system is a "hybrid" central composting toilet system, meaning that it can operate with or without electricity. This makes it an ideal model for homes that don't currently have electricity, but expect to in he future, or homes that experience frequent power outages or those using generators for more than 8 hours per day. The Centrex 2000 AC/DC does require plumbing connections for water. When operating electrically, the CENTREX 2000 AC/DC has a thermostatically controlled heater that helps to warm and evaporate liquid and a fan assembly that maintains a partial vacuum within the unit at all times, ensuring odorless operation. When the power is out, the unit will default to the 4" vent stack that acts like a chimney on a wood stove, constantly drawing air upward and out of the unit to maintain odor free operation.

These systems offer a traditional looking toilet fixture in your bathroom and are ideal for people who have the space below the unit to place the central composting unit. Please remember that this product only includes the central composting unit, not the toilet fixture. These toilet fixtures to be installed in the bathroom are sold separately.


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 that this system will operate odorlessly and produce 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 AC/DC:
  • This composting toilet will compost any type of toilet paper you use without a problem.
  • When you initially start using your system you will need to add some Compost Sure Blue (hemp stalk bulking material) into the Bio-Drum™ as well as some Microbe Mix.
  • For ongoing daily use, you will need to add a cupful of Compost Sure Blue per person, per day. Additionally every 2-3 days, rotate the drum 5 or 6 full revolutions. For short periods of use such as weekends, just rotate before you leave the location.
  • When the Bio-Drum™ is half to 2/3 full, you will need to move some the compost to the finishing drawer. This is an easy and sanitary process completed by releasing the drum lock and rotating the drum backwards. You will never come in contact with fresh material, as the fnished compost drops onto the finishing drawer.
  • The compost should remain in the finishing drawer for at least 4 weeks. While there it will be kept separate from fresh material to prevent contamination.
  • After 4 weeks, you can slide the drawer out and remove the compost. The finished compost product is clean, dry, and sanitary. It will resemble compost that comes out of a garden composter, and your flowers will flourish!

Composting Toilet

  • This is a central system that uses water and can be used with or without electricity
  • Please note, the Centrex 2000 AC/DC is comprised of the Centrex 2000 standard electric unit plus an AC/DC Conversion Kit. See Instruction Manuals below for more information.
  • Works with one pint low flush toilets, SOLD SEPARATELY
  • 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 to warm and evaporate excess liquid and a fan assembly that maintains a partial vacuum to ensure odorless operation
  • Four inch vent stack maintains a partial vacuum, also preventing any odor, when no electricity is available
  • A 12 Volt DC fan is included with the unit, and should be installed in the vent stack if the unit is going to be used residentially or heavily, or if it's in a location that may be subject to downdraft. (Please note, power source for the fan is not included.)
  • All Sun-Mar units feature 3-chamber technology:
    • The patented Bio-Drum™ - compost is mixed and aerated
    • The Evaporating Chamber - excess liquid is evaporated
    • The Finishing Drawer -separates finished compost from unfinished material

Composting Toilet

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 Centrex 2000 Instruction Manual
  • View AC/DC Conversion Kit Instruction Manual
  • Composting Capacity When Operating Electrically:
    • 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
  • Composting Capacity When Operating Non-Electrically:
    • Residential & Continuous Use: 3 Adults or a Family of 5
    • Weekend & Vacation Use: 6 Adults or a Family of 8
    • 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: 4" Sewer pipe and 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 36" 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" (Same for both 2" and 4" vents)
    • Vent inlet center distance from left side of unit: 12" (Same for both 2" and 4" vents)
    • Height to center of 2" vent: 23-1/2"
    • Height to top of 4" vent: 32"
  • Unit shell is constructed of durable fiberglass and ABS plastic
  • Product Weight: 103 lbs.
  • Shipping Weight: 124 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).

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