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Self-Contained Toilets

Sun-Mar’s line of self-contained composting toilets provide the convenience of indoor plumbing, when installing a full septic system is impractical or impossible. Composting toilets are perfect for retrofitting old houses, boats, RV, and off-grid cabins. We sell AC, DC, and non-electric models. The Sun-Mar Mobile is even Coast Guard approved for marine use.

From manufacturer:

Wherever there is a poorly working septic system, a Sun-Mar can take care of the toilet waste; where there is an outhouse we offer the luxury of an indoor facility; and where there is no toilet at all, a Sun-Mar provides the right environmental choice. Sun-Mar units are economical, quick to install and easy to use. 

Because no chemicals and no septic systems are used, fragile environments can be protected. A Sun-Mar composting unit is an environmentally healthy choice for recycling human waste. The Sun-Mar system produces no pollutants, while collecting nutrients. With a Sun-Mar, recycling is made easy!

  1. Sun-Mar Microbe Mix Compost Booster

    Sun-Mar Microbe Mix Compost Booster

    $17.90
    • Microbe and enzyme mix for composting toilets
    • Add a scoop every 2-3 weeks to maintain compost efficiency
    • Use instead of topsoil in compost startup, to establish correct bacteria
    • Non-toxic, 100% natural, and safe for humans and pets
    • Single 16 ounce jar
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  2. SM-CQUICK

    Sun-Mar Compost Quick

    $16.50
    • Compost accelerator spray for composting toilets
    • Enzyme liquid supports aerobic bacterial action
    • Spray 3–4 pumps into toilet, before rotating compost drum
    • Can also be used to clean the bowl liner
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  3. SM-CSURE-GREEN

    Sun-Mar Compost Sure Green, for Waterless Toilets

    $22.50
    • Compost Bulking agent for waterless composting toilets
    • A mix of hemp fiber and coarse sphagnum peat moss
    • Helps retain moisture, and ensure porosity
    • Add 1 scoop to composter for every bowel movement
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  4. Sun-Mar 12V Ventilation Fan

    Sun-Mar 12V DC 4in. Vent Fan

    $70.00
    • 12V DC composting toilet vent fan
    • Improves airflow in Non-Electric toilets
    • Installs easily in 4 inch toilet vent pipe
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  5. 2" x 30" Electric Composting Toilet Vent Pipe

    Sun-Mar Pipe 2" X 30" Electric Toilet Vent Pipe

    $6.35
    • 2" X 30" electric toilet vent pipe
    • NOT FOR USE with NON-electric composting toilets
    • CANNOT be substituted with standard PVC pipe
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  6. SM-DIFFUSER-2

    Sun-Mar Electric Toilet Vent Pipe Diffuser 4"

    $21.00
    • 2"-to-4" electric toilet vent pipe diffuser
    • Recommended to protect venting from downdrafts & freeze-ups
    • NOT FOR USE with ELECTRIC composting toilets
    • CANNOT be substituted with standard PVC pipe
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  7. SM-COUPLING-2

    Sun-Mar 2.5" Electric Toilet Vent Pipe Coupling

    $3.80
    • 2.5" straight electric toilet vent pipe coupling
    • NOT FOR USE with NON-electric composting toilets
    • CANNOT be substituted with standard PVC pipe
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  8. SM-45-2

    Sun-Mar 2" 45° Electric Toilet Vent Pipe Connector

    $1.50
    • 2" 45° electric toilet vent pipe coupling
    • NOT FOR USE with NON-electric composting toilets
    • CANNOT be substituted with standard PVC pipe
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  9. SM-90-2

    Sun-Mar 2" 90 degree Electric Toilet Vent Pipe Connector

    $2.40
    • 2" 90° electric toilet vent pipe coupling
    • NOT FOR USE with NON-electric composting toilets
    • CANNOT be substituted with standard PVC pipe
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  10. SM-FAN-SPEED

    Sun-Mar Replacement Fan Speed Control

    $80.25
    • Replacement control switch for Sun-Mar ventilating fans
    • Fan is required for proper function of electric composting toilets.
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