Originally Posted By: goodtimes
When Purotater says 99.9$ @20 microns, 20 is the starting point, plus all other stuff larger in the test powder. Same test, same starting point to compare to.
Purolator actually filters only 20 micron particles. Smaller particles go through the media. Larger particles simply get bypassed through the big tear in the media.
When Purotater says 99.9$ @20 microns, 20 is the starting point, plus all other stuff larger in the test powder. Same test, same starting point to compare to.
Purolator actually filters only 20 micron particles. Smaller particles go through the media. Larger particles simply get bypassed through the big tear in the media.
