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How to Operate the CENTREX 3000 AF NE
Product Features
Technical Specs
Return Policy
CENTREX Central systems are an ideal solution for those who want a traditional looking toilet in the bathroom, and who have the ability to place the central composting unit below the toilet. It is important to note that with all central systems, what you are purchasing is the central composting unit that is installed on the lower level; the toilet fixture to be installed in the bathroom is sold separately.
The CENTREX 3000 family are extra high capacity units designed for very heavy cottage use or medium heavy residential use. CENTREX 3000 family units are unique from other central composting systems 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, making finished compost removal easier than ever!
The CENTREX 3000 AF NE is a non-electric, waterless central system is designed for homes with no continuous supply of water or electricity, making it the ideal solution for those are are truly living "off the grid." This system features a 4" vent stack that exits vertically from the unit and runs up and out the roof line. This vent acts like a chimney on a wood stove, constantly drawing air upward and out, maintaining a partial vacuum within the unit to ensure odorless operation at all times. A 2.4 watt 12 volt fan is also included, and should be installed in the vent stack to aid in the venting process (power source not included).

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.
How to operate the CENTREX 3000 AF NE:
- For initial start up, add some Compost Sure (peat bulking material) into the Bio-Drum together with some Microbe Mix.
- Use any toilet paper you want; the composting toilet will compost it without a problem.
- For ongoing operation, add a cupful of Compost Sure per person, per day of use. Every 2-3 days (while unit is in use), rotate the drum 5 or 6 full revolutions. For weekend use, just rotate before you leave at the end of the weekend.
- The unique Auto-Flow technology of the CENTREX 3000 AF NEmeans that as compost becomes finished, it will automatically drop into the collection chamber on the right side of the unit 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 it is used.
- What do you do with the finished compost? 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.

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Features
- Dry central system non-electric unit that does not use water
- Works with dry toilet, SOLD SEPARATELY
- Will evaporate all liquids under normal conditions, producing zero output
- Features extra large patented Bio-Drum™ for composting capacity of 7 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)
- Features a 4" vent stack that maintains a partial vacuum to ensure odorless operation at all times
- Comes complete with a a 2.4 watt 12 volt fan that fits in the vent stack to improve venting (power source not included)
- All Centrex 3000 Family units feature 3-chamber technology that is unique from other Centrex central systems:
- The patented Bio-Drum™, where compost is mixed and aerated
- The Evaporating Chamber, where excess liquid is evaporated
- The Collection Chamber, where finished material automatically flows and can be removed easily when needed.

Technical Specs:
- Designed for use with dry toilet, SOLD SEPARATELY
- Only one toilet can be installed on the CENTREX 3000 AF NE system, because the toilet must be installed directly above the central composting unit
- View Dimensional Line Drawing
- View Product Instruction Manual
- Composting Capacity:
- Residential & Continuous Use: 5 Adults or a Family of 7
- Weekend & Vacation Use: 7 Adults or a Family of 9
- 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 36" 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: 34-1/4" (Note: Waste inlet is the "collar" at the top of the unit that the toilet drain connects into)
- Diameter of waste inlet (including flange): 10-3/4"
- 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: 94 lbs.
- Shipping Weight: 170 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.
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