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Water Fact:
Only about 0.003% of the world's water is available for human use as fresh surface water or groundwater. The rest is locked up in glacial ice, or is salt water.

Handling Excess Liquid

The electric EXCEL, COMPACT, CENTREX 2000 A/F and CENTREX 3000 A/F will evaporate all liquids, depending on use and climate. Prolonged over-capacity use or extremely humid weather may result in excess liquid. Keep in mind that we're talking about ounces of liquid, not litres or gallons.

However, for other than the CENTREX 2000 A/F and 3000 A/F, where it is optional, all central composting toilet systems, as well as the EXCEL-NE, the SUN-MAR MOBILE, and the SPACESAVER should have the overflow security drain connected.

Even though we expect the EXCEL, COMPACT, and CENTREX 2000 A/F and 3000 A/F to evaporate all liquids in most situations, we always recommend that the overflow drain be connected if the units are being used residentially, or if the units will be seeing heavy use for a short period of time (ie. party, large family visits). This drain should always be connected as a security measure.

Drain InstallationA 10-foot length of 1" drain hose and a stainless steel hose clamp are supplied with all CENTREX units, NE(non-electric) units, the SPACESAVER, and all SUN-MAR MOBILE units (see diagram at left).

Collect and/or treat excess liquid in an approved facility such as a recycling bed, old septic system, holding tank or drain pit.

Recycling Beds

To make a recycling bed to evaporate and transpirate the liquid without touching the environment, simply dig a bed 18" deep, and line it with plastic sheet. Bed size - normally 3-25 square feet - varies with geographic area and season. Fill it with 6" of gravel then 12" of sand and plant with grass and shrubs.

Click here to open and/or download a simple guide to building your own. This guide is in pdf format and requires Adobe Reader to open it. If you don't have Adobe Reader click on the Adobe icon to download your free copy.

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Drain Pits
Drain Pit DiagramDrain pits for excess liquid should be installed in accordance with local regulations. In many areas, this is about 1 ft. deep and 2 ft. in diameter. Place sturdy cover (plastic, tin or wood) and a 6" mound of earth over the drain to prevent soil and surface water from settling into the gravel. See the diagram at left.

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