Sun-Mar composting toilets – whether self-contained or Central systems – have the capability to evaporate liquids, depending on usage and climate conditions (ie. use over-capacity and extremely humid weather)*.
That being said, all Sun-Mar units, with the exception of the GTG, come with an installed safety drain for an extra measure of security in residential and heavy usage situations. Despite their capacity for evaporation, if you expect your Sun-Mar to have heavy or regular usage, installing the safety drain is recommended. Some composting toilets, like the Excel NE, come with the safety drain hose when purchased new. For more information, check our What’s In the Box? page.
Any excess liquid that comes out through the Sun-Mar composting toilet safety drain should be collected and/or treated in an approved facility such as a recycling bed, old septic system, holding tank or drain pit. Installation should be in accordance with your applicable local regulations.
For information on using a recycling bed capable of handling liquid output from your Sun-Mar composting toilet safety drain, please call our customer service team.
*Evaporation rates will be more substantial in electric, self-contained toilets. Non-electric and Central units with ultra low-flush toilets will have slower evaporation rates due to the consistent influx of liquid, and/or lack of heat.
