Central Flush

sun-marThree differently sized units, the Centrex 1000 (batch unit), Centrex 2000 (batch unit) and Centrex 3000 (continuous unit) are available for use with 1 pint flush toilets. The selection should be based on both whether the unit is used seasonally or residentially, and the number of people that will be using the unit.

AC/DC Kits available

Select the AC/DC kit if you require the option of operating in a standard electric mode (115 Volt) or with only a 12 Volt (1.4 Watt) fan or with no power at all. When converted the unit will have both a 2 inch and 4 inch vent stack.

Download the product Brochure for information on available models, physical dimensions and installation instructions
Sunmar Brochure.PDF
CENTREX 1000

The Centrex 1000 model is ideal for those who have electricity and want a unit for a light seasonal application. In light to medium seasonal use the Centrex 1000 is typically able to hold compost for the full season, and compost needs extraction only in the Spring.

The Centrex 1000 features a 260 watt heater in a sealed compartment under the unit and the standard Sun-Mar 25 watt turbo fan and 2″ vent stack to ensure odorless operation.

All 1000 series units are supplied with a 1″ drain hose which should be connected to the 1″ drain at the bottom left of the unit. Click here for more information on handling excess liquid.

The 1000 series is designed only for use with 1 pint flush toilets (purchased separately).

  • Electric Unit
  • Regular Capacity
  • 5-7 Weekend and Vacation Use ONLY
CENTREX 1000
CENTREX 1000 NE

The Centrex 1000 NE was recently re-engineered for better compost flow to include input doors on the left and an output door on the right. This output door is only open when the drum is rotated backwards to extract compost.

  • Non-Electric Unit
  • Regular Capacity
  • Composting Capacity
  • 4-6 Weekend and Vacation Use ONLY
CENTREX 1000 NE
CENTREX 2000

Perfect for medium to heavy seasonal or light residential use, the Centrex 2000 allows for both a longer composting cycle, and larger waste volumes than the 1000 models. The increased surface area in the evaporating chamber coupled with the larger heating element also provides better evaporation on electric units.

  • Electric Unit
  • High Capacity
  • 4-6 Residential/Continuos Use
  • 7-9 Weekend and Vacation Use
CENTREX 2000
CENTREX 2000 NE

Perfect for medium to heavy seasonal or light residential use, the Centrex 2000 NE allows for both a longer composting cycle, and larger waste volumes.

  • Electric Unit
  • Regular Capacity
  • 3-5 Residential/Continuos Use
  • 6-8 Weekend and Vacation Use
CENTREX 2000 NE
CENTREX 3000

The Centrex 3000 utilizes a continuous flow design for very heavy cottage or medium residential use. With a continuous flow system, rotation of the drum moves compost along the larger and longer 3000 series drum, before it drops automatically into the collection housing at the end of the unit. Under normal operating conditions the drum will not have to be turned backwards for emptying.

  • Electric Unit
  • Extra- High Capacity
  • 6-8 Residential/Continuous Use
  • 9-11 Weekend and Vacation Use
CENTREX 3000
CENTREX 3000 NE

The Centrex 3000 NE utilizes a continuous flow design for very heavy cottage or medium residential use. With a continuous flow system, rotation of the drum moves compost along the larger and longer 3000 series drum, before it drops automatically into the collection housing at the end of the unit. Under normal operating conditions the drum will not have to be turned backwards for emptying.

  • Non-Electric Unit
  • Extra- High Capacity
  • 5-7 Residential/Continuous Use
  • 8-10 Weekend and Vacation Use
CENTREX 3000 NE
Sealand Toilet

Sun-Mar offers a selection of 1 pint flush toilets for use with regular Centrex 1000, 2000, and 3000 series central composting toilet systems. More than one “1 pint flush” toilet can be installed with these units if necessary. The constraint is the number of people using the system rather than the number of toilets.

Using about one pint per flush, these ultra low flush toilets provide all the advantages of a flush toilet while minimizing water usage. They are ideal for use with Sun-Mar Central Composting Systems, but can also be used with holding tanks, overloaded septic systems, and in RV’s.

Sealand Toilet