• CAD cutaway of Model 1112 evap separator (early prototype)

    Tougher Than OEM

    Built with brass hose adapters that won't snap off, and pressure-tested to 15PSI. Our separators fix the shortcomings of the original.

  • Class-4 JIS M6 SEMS bolts are packaged with every CompyFab evap separator

    Hardware Included

    Everything you need for a full install. JIS class-4 M6 SEMS bolts to match the hardware in your rig, and properly-sized hose clamps.

  • Credit Tony Webster, licensed under Creative Commons Attribution 4.0 International license.  Source: https://www.flickr.com/photos/diversey/55006071026/

    Made in Longmont, Colorado

    Designed, crafted and assembled in our shop. We're quick to ship and happy to answer support questions.

  • Fritz and a friend near Yankee Hill Road

    Developed With The Community

    We're active in the 'Mud community, test our prototypes with actual Cruiser owners, and listen to customer feedback.

Andy at the wheel of Fritz near Longmont, Colorado

A Word From Andy

I started Compy Fabrication in October 2025 after chasing a gas smell in my '78 FJ40. I found a lack of good replacement options for evap separators out there. Now I make them.

About the Shop