The Safety Drain Hose
For all CENTREX 3000 units, the safety drain must be connected. The safety drain is to remove excess
liquid that is not evaporated from the evaporation chamber.
*The safety drain is gravity fed, and so, must slope downward at all points. Do not merge sinks, bathtub,
etc. drains to the safety drain.
1) The drain assembly (fig. 1), has a cap on one end, the other end will
be uncapped to facilitate the connection of the drain hose (Included
with unit). The cap can be removed, and placed on either side
of the drain assembly, for convenience of installation.
Fig 1
2) Place the 1” SS hose clamp over the end of the hose that will
be connected to the drain assembly. Carefully push the drain hose
over the barbed end of the drain assembly where the cap has been
removed (Fig 2) so that the drain hose will overlap the drain Fig. 2
assembly by 1”.
3) Move the 1” SS hose clamp on to the section of the hose that is
covering the end of the drain assembly. Use a flat head screwdriver
to tighten the 1” SS hose clamp (Fig 3), until the drain hose is firmly
affixed to the drain assembly
Fig 3
4) The drain assembly is gravity fed, ensure that the drain hose is
lower than the drain assembly at all points (Fig 4). This may
necessitate clamping the drain to the floor in some installations.
Fig 4
Effluent Handling
The following are possible options to take care of the liquid:
- Feed into a lined pit filled with gravel and sand. Such a
recycling bed also ensures a closed loop system.
- Feed into a small cesspit or “French drain”.
- Plumb into an existing septic or holding tank line.
Installation should be in accordance with applicable local regulations.
Installing The Waste Pipe
When installing the waste pipe from the toilet to the unit, the following should be considered:
1) The pipe should be either 45 ° or vertical (if composting unit is directly below toilet), or at a 2-3 ° angle (1/8 inch-1/4
inch or 3mm-13mm drop per foot maximum) so that the waste travels with the liquid.
2) Pipe should not slope upwards at any point.
3) Connections should be snug so that waste does not collect and cause blockage.
4) It is recommended that the waste pipe be no longer than 15 feet (460cm) without installing a clear out port (a Y fitting
with screw on end cap) near the toilet to provide easy access should it be required.
5) Use a soft sealant, such as silicone for the connection of the waste pipe to the unit so that the unit can be moved for
servicing or other reasons should this ever be required.
6) Insulate pipe if unit is to be used during the winter.
7) For installations of waste pipe over 6 feet, ensure the waste pipe is supported to prevent sagging.
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