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

Toilet fixture sold SEPARATELY.

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Product Code: CENTREX_2000_AF
Our Price: $2,560.00

Availability: Usually Ships in 1 to 2 Weeks


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How to Operate the CENTREX 2000 AF
Product Features
Technical Specs
Return Policy

The CENTREX 2000 AF is an electric, waterless system, designed for homes that have a constant supply of electricity. It includes a heater with a thermostat to warm and evaporate liquid as well as a fan that maintains a partial vaccuum to ensure odorless operation. With a Bio-Drum™ 50% larger than the 1000 series, it can handle medium to heavy seasonal use or light constant use. This unit is easy to install, since it needs no water lines, and the safety drain only has to be hooked up if the unit is going to have heavy use.

Central composting toilet systems work great for families that want a traditional bathroom fixture and can place the central composting unit directly under the toilet. Please keep in mind that this product includes the main central composting unit and does not include the toilet fixture. The toilet fixtures 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.

Steps for operating the CENTREX 2000 AF:
  • At the initial start up, add some Compost Sure (peat bulking material) into the Bio-Drum™ together with some Microbe Mix.
  • The composting toilet will compost any toilet paper so you can still use your favorite brand.
  • During daily use, add a cupful of Compost Sure per person, every day. You will also need to rotate the drum 5 or 6 full revolutions, every 2-3 days. For weekend use, and other short periods, just rotate before you leave at the end of the weekend.
  • You will need to move compost to the finishing drawer when the drum is half to 2/3 full. This is accomplished by releasing the drum lock and rotating the drum backwards. This causes the finished compost to drop into the finishing drawer. It is an easy process that keeps you from coming in contact with fresh material.
  • The compost will need to reamin in the drawer for 4 weeks to continue to finish and sanitize. Here it remains separated from the fresh material so that contamination does not occur. After 4 weeks you simply open the drawer and remove the finished product. You will find that it is clean, dry, and sanitary, just like that would come from a garden composter.

Composting Toilet

  • Dry central system electric unit that does not use water
  • Please note, the Centrex 2000 AF is comprised of the Centrex 2000 standard water flush unit plus an AF Waterless Conversion Kit. See Instruction Manuals below for more information.
  • Works with dry toilet, SOLD SEPARATELY
  • Will evaporate all liquids under normal conditions, producing zero output
  • Features patented Bio-Drum™ for composting capacity of 6 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-Drum™, 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

Composting Toilet

Technical Specs:
  • Designed for use with dry toilet, SOLD SEPARATELY
  • Only one toilet can be installed on the CENTREX 2000 AF system, because the toilet must be installed directly above the central composting unit
  • View Dimensional Line Drawing
  • View Centrex 2000 Instruction Manual
  • View AF Waterless Conversion Kit Instruction Manual
  • Composting Capacity:
    • Residential & Continuous Use: 4 Adults or a Family of 6
    • 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: 2" Cent. Vac. tubing
    • Drain: 1" O.D. (Drain only needs to be hooked up if unit is to be used heavily.)
  • 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 31" 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: 33"
    • Height of waste inlet assembly: 5-1/4"
    • Diameter of waste inlet (including flange): 10-3/4"
    • 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: 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, and original shipping charges are non-refundable. 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).

Accessories for this product...
Dry Toilet for use with Waterless Central Systems
Our Price: $385.00

Dry composting toilet for use with waterless systems by Sun-Mar
Compost Sure, 8 gallon bag
Our Price: $49.99

Compost Sure for Sun-Mar Composting Toilets

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