T.R.A.P.™ Breather

The Thermally Reactive Advanced Protection (T.R.A.P.) Breather assembly protects the contents of your storage tank from airborne moisture and particulate contamination. It combines a high capacity 3 micron air filter with a deliquescent breather that dries itself when air is expelled from the tank. This self-regenerating capability of T.R.A.P. enables extended life. Keep your fluids clean and dry with a Donaldson Clean T.R.A.P. Breather.


  • For use with all diesel fuels and lubricants
  • Above and below ground tanks
  • Mobile service trucks
  • Indoor or outdoor applications
  • Most tanks up to 40,000 L / 10,000 gal (large tanks may require multiple units)


  • Superior moisture and particulate contamination protection
  • Longer service intervals than typical silica gel breathers
  • Can be installed in a variety of applications


  • High efficiency air filtration
  • Self-regenerating moisture adsorption
  • Easy to service
  • For indoor or outdoor use, even in cold temperatures
  • Service every four months on a preventive maintenance schedule

  • Use spin-on replacement filter element P923075