The Centrex 2000 A/F (Air Flow) NE is a low voltage, waterless “off-grid” alternative to the straight Centrex 2000 model. The system is designed for use in conjunction with a waterless toilet pedestal and processes waste under the bathroom floor, the non-electric system is slightly smaller than its electric counterpart.
Whilst not as large as the Centrex 3000, the 2000 A/F NE model still comfortably accommodates a seven-person holiday house usage, requiring only one compost removal annually. In a residential capacity, the compost will need to be dealt with more frequently.
There is no heating unit in this model so it will operate beautifully on solar or mains power. Without the heater the evaporation process is not as effective as in the 240 volt system. Therefore an overflow drain to a small sub-surface gravel pit is required (200x40x40cm).
A 100 mm vent and low voltage fan help to ensure that odours are dispelled with minimal electrical draw.
The Centrex 3000 works on a continuous flow design to maximise its capacity and improve the composting process. The rotation of the drum forces the compost along the length of the Centrex 3000 and into an auto-drop mechanism, which lets the compost fall into the collection housing. Unlike with the smaller Centrex 2000, the drum doesn’t have to be rotated backwards for emptying. The drum handle can continually be rotated in a clockwise direction and allow the material to work along the drum and deposit in a separate collection box.
The Centrex 3000 (Air Flow) A/F is the waterless version of popular Centrex range. In the A/F model the waste falls under gravity into the drum of the composter. In the case of the micro flush model the waste is transferred by the 500mL flush and multiple pedestals can be installed with one composter. This is not possible with the AF model as the straight fall is required.
The Centrex 3000 A/F is a 240 volt unit as standard. The solar compatible Centrex 3000 A/F NE version is a 12 volt (1.9 watt fan) version.
A thermostatically controlled heater is built into a compartment under the unit to help aid in the evaporation process. The Centrex 3000 has a vent stack and 35 watt fan to supply oxygen to the pile and eliminate all odours.
The unit also comes with a drain hose to ensure any excess liquids are removed to a small sub surface gravel absorption trench.
1 . Adding bulking agent/mulch & rotating the Bio-drum
These are the only activities you will have to do on a regular basis when it comes to maintaining your Sun-Mar composting toilet system. You will need to add bulking material (approximately a cupful per person per day) and rotate the drum. Sample bags of the bulking material (sugarcane mulch) are provided with the toilet and can be sourced from landscape/garden supply stores. Peatmoss can be added to the bulking agent to increase the moisture level if the compost is drying out too quickly.
2. Removal of Compost
The drum rotation is a periodic task which ensures that, when it comes time to empty the compost, you can be assured you will have produced nice compost. The handle of the Bio-drum on the Centrex, Excel and Compact should be rotated clockwise every second day when the toilet is in use. You will need to rotate the drum backwards when it is approximately half full. This will empty a portion of the compost into the finishing drawer. It is best to leave the compost in the finishing drawer for approximately 7 weeks so that the compost can continue to process.
More detailed maintenance schedule is supplied with the toilet. If you require any further information please contact us.