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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!

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  1. Sun-Mar Space Saver and Centrex 1000 Fan

    Sun-Mar Space Saver and Centrex 1000 Fan

    $151.00
  2. Replacement fan for Space Saver and Centrex 1000
  3. Learn More
  • Sun-Mar AC Replacement Fan Unit 1999 to Present

    Sun-Mar AC Replacement Fan Unit 1999 to Present

    $152.00
  • Fan and motor assembly for electric units
  • 1999 to present
  • Learn More
  • Sun-Mar Microbe Mix Compost Booster: Six Jars

    Sun-Mar Microbe Mix: Case (6)

    $107.40
    • 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
    • Six (6) 16oz jars of microbe booster
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  • 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
    Learn More
  • 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
    Learn More
  • 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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  • 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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  • 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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  • 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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  • 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
    Learn More
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