In addition, the separated 1st and 2nd filter stops contamination of 2nd filter, and avoids inconvenience of traditional hand-operated draining thanks to its auto-discharging of the filtered water by its auto drain system
The traditional filter type purifier is non-economical because you should discard filter and replace with a new one when it is clogged and because it cannot remove water and carbon. The ISP-type Purifier removes sludge (1st filter) and water (2nd filter), promoting the efficiency of the engine and reducing oil and maintenance cost because it's possible to clean and re-use.
Principle
Oil Purifier
HS CODE 842131