Automatic Venting Cap

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Product Overview

Are you sick of having air in your ballast bags? Try these Fat Sac Air release Plugs that allow you to release all the air out and fill up with water to get the  maximum weight you need.

Boater's Outlet has a large selection to help you make your ballast bags set up perfect this summer!!


  • This fitting allows the air to bleed from the bag, but not water.
  • Made from 6/6 Nylon
  • Proprietary Heyco membrane inside
  • Great for fully automated systems in boats

California Residents:

prop 65 warningWARNING: This product can expose you to chemicals including Diisononyl phthalate (DINP), which is known to the State of California to cause cancer. For more information go to


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