3" Coupling


$17.95 flat rate S&H total per parts order no matter how many items you order*. Usually ships within 5-7 days.


This 3" Coupling is used to connect the 3" Vent Pipe on Envirolet® Waterless Self-Contained Systems.


  • 2 of these 3" Couplings are included in the standard Vent Kit with the purchase of a new Waterless Self-Contained System. You'll need additional couplings if you plan to extend your vent pipe more than 10 feet.
  • When attaching vent pipe with coupling, be sure to use silicone sealant to properly seal it.

Please call and speak to a customer service rep if you have any questions about venting your Envirolet® System. Venting is one of the most important aspects of installation of your composting toilet system.


  • 3"/75mm
  • White

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