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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. SM-DC-KIT

    Sun-Mar Excel Conversion Kit: AC to Non-Electric or 12V

    $209.00
    • Converts 120V composting toilets to 12V or non-electric use
    • For AC electric Excel, Centrex 1000, 2000, and 3000
    • Includes 8' of vent pipe
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  2. 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
    Learn More
  3. 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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  4. 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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  5. 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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  6. 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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  7. 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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  8. Sun-Mar Space Saver and Centrex 1000 Fan

    Sun-Mar Space Saver and Centrex 1000 Fan

    $151.00
  9. Replacement fan for Space Saver and Centrex 1000
  10. 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
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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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