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All Sun-Mar units include everything needed for installation. The package contains the complete vent stack, electrical hook-up cable, peat mix to start the compost, and an owner's manual which covers installation, start-up, and ongoing maintenance.

All units with 1" drains include a 10 ft. length of drain hose.

Installation of the vent stack is the main task in installing self-contained units. Vent stacks for electric units include a 10 ft. length of 2" pipe (15 ft for central units), pipe fittings, diffusor, and roof flashing. Self-contained electric units also include 6 ft. of vent pipe insulation.

These same components are included with non-electric units except that the vent is 8 ft. of 4" pipe (13 ft. for Central units).

The diffusor is a device originally patented by Sun-Mar principals, and is designed to facilitate updraft, avoid freezing up in winter, and protect the vent from downdraft and weather.

Central composting & Self-Contained composting toilet installations

One of the main tasks is the installation of the vent stack, which is included with all units.
The vent kits included in the shipping carton are sufficient for installation in most single story buildings. If more is needed they are normally easy to find. All vent pipes are thinwall PVC.
For more vent stack installation information, click here.

The second main task of installing a central unit is the waste piping installation. Click here for full information on how to do this.

All electric units are supplied with a power cord and pre-molded plug which connects to a standard (3) pin 115 Volt outlet and powers both the fan and heating element. 12 Volt fans for non-electric models can be installed in-line with the stack, and connected to a battery which draws from an alternate source of energy, such as a solar panel.

Central units are all fitted with 1" drains, which should be connected to an approved drain pit, container, or other facility. Click here for more information on handling excess liquid.

SUN-MAR units serve as a reliable year-round facility when prepared for continuous or periodic use during the cold winter months. If you use your cabin only once in a while in the winter, the unit may be used as a holding tank during this time. If your SUN-MAR will be in use every weekend in the winter, or in a residence, the temperature must be kept above 55o F at all times to keep the compost going. Click here for more information on winter use.

For in-depth installation instructions for electric central units, click here.
For non-electric central units, click here. These instructions are straight from the 
manual that you receive with your Sun-Mar unit.

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