APT™ DEF System

Featuring The DEF Recircualtion System

Use this system setup diagram to help you place your next order for a complete diesel exhaust fluid compatible system.

Be sure to download the full size PDF under the "Downloads" tab below.

  • Highlights

    Recirculation System

    Diesel exhaust fluid will freeze at approximately 12 °F. To prevent freezing of fluid in colder climate installations, we suggest the recirculation system detailed here. A TS-550 evo™ tank gauge paired with temperature sensors installed using the recirculation tee assembly will ensure automated recirculation and prevent freezing.

  • Downloads