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CENTREX 3000 NE Extra High Capacity Non-Electric Central System (Water Flush)
Centrex 3000 NE extra high capacity composting toilet by Sun-Mar

Toilet fixtures sold SEPARATELY.

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Product Code: CENTREX_3000_NE
Our Price: $2,399.00

Availability: Usually Ships in 1 to 2 Weeks


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How to Operate the CENTREX 3000 NE
Product Features
Technical Specs
Return Policy

The CENTREX 3000 NE is a non-electric, water flush central system is designed for homes with a water source, but with no continuous supply of 110 Volt electricity. This system has a 4" vent stack that runs up and out the roof line, creating a partial vacuum within the unit to ensure odorless operation, by constantly drawing air upward and out. A 2.4 watt 12 volt fan is included with the unit, and can be installed in the vent stack to improve venting, if needed. Please note, a power source for this fan is not included.

CENTREX Central systems are perfect for when a traditional looking toilet in the bathroom is desired, and where the ability to place the central composting unit below the toilet is possible. Like all central systems, you are purchasing is the central composting unit that is installed on the lower level; the toilet fixtures to be installed in the bathroom are sold separately.

These extra high capacity units designed for medium heavy daily use or very heavy periodic use, and are unique because they incorporate Sun-Mar's Auto-Flow technology. This means that as the drum rotates, finished compost moves automatically through the drum and into a separate collection chamber at the end of the unit.


All CENTREX 3000 family systems 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. The NST only certifies composting toilet systems that are odorless and that produce clean, sanitary finished compost. Visit the NSF website to see the CENTREX 3000 family's NSF Certification Listings.

Operating the CENTREX 3000 NE is easy!:
  • Initailly just, add some Compost Sure Blue (hemp stalk bulking material) into the Bio-Drum™ together with some Microbe Mix.
  • No need to change toilet paper, the composting toilet will process all kinds problem free.
  • As you continue to use it, add a cupful of Compost Sure Blue per person, per day of use. Then, rotate the drum 5 or 6 full revolutions, every 2-3 days. For shorter periods, just rotate before you leave.
  • The unique Auto-Flow technology of the CENTREX 3000 NE means that as compost finishes, it automatically drops into the collection chamber, where it is kept separate from fresh material. The drawer on the collection chamber can be easily pulled out by hand to remove compost; no tools are required to open it.
  • After emptying the collection chamber, the compost should be moved into another bin where it can sit for 6 months to become fully finished and sanitized, before use.
  • The result is a clean, dry, non-offensive, and sanitary product that will look and smell just like any other regular compost that might come out of a garden composter.

Composting Toilet

  • Central system non-electric unit that uses water
  • To be used with one pint low flush toilets, SOLD SEPARATELY
  • Extra large patented Bio-Drum™ for composting capacity of 8 adults (weekend use) or 5 adults (residential and continuous use)
  • NSF tested and certified for a continuous 6 months at maximum rated capacity (click here to view NSF certification)
  • Four inch vent stack that maintains a partial vacuum to ensure odorless operation
  • If needed, venting can be improved by installing the 2.4 watt 12 volt fan that's included with the unit (power source for fan not included)
  • Three-chamber technology that is unique from other Centrex central systems:
    • The patented Bio-Drum™, for compost mixture and aereation
    • The Evaporating Chamber, for excess liquid evaporation
    • The Collection Chamber, for finished material flow and easy removal

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 3000 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: 5 Adults or a Family of 7
    • Weekend & Vacation Use: 8 Adults or a Family of 10
    • Please note, family numbers above include both adults and small children
  • Vent & Drains:
    • Vent Pipe: 4" sewer pipe
    • Drain: 1" O.D. (Note: drain hookup is required on this unit)
  • Dimensions:
    • Unit Dimensions: 71" W x 27-1/2" D x 29-1/4" H (Note: This includes the Collection Chamber, which accounts for 13-1/2" of the 71" overall width)
    • Dimensions of Shipping Carton for Main Unit: 60-1/2" L x 28" W x 33" H
    • Dimensions of Shipping Carton for Collection Chamber: 24" L x 16" W x 23" H
  • Rough-in Measurements:
    • Depth required to remove finishing drawer: 45-1/2"
    • Height from base of unit to top of waste inlet assembly: 31-1/2" (Note: Waste inlet is the "collar" at the top of the unit that the toilet drain connects into)
    • Diameter of waste inlet (including flange): 3" DWV
    • Vent inlet center distance from rear of unit: 19-1/4"
    • Vent inlet center distance from left side of unit: 37-3/4"
    • Height to top of vent outlet assembly: 33"
  • Unit shell is constructed of durable fiberglass
  • Product Weight: 88 lbs.
  • Shipping Weight: 164 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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