This video shows how to exchange the O-Rings on an Alfie 500. This should be done at least once a year while intermediate service. THIS VIDEO DOES NOT REPLACE THE MANUAL. PLEASE ALSO READ THE MANUAL! The Alfie 500 is designed to clean a multitude of industrial fluids from a cutting fluids to a wash baths as long as the liquids are water based. Due to the variety of chemical properties of these liquids it is recommended to exchange the O-Rings on the high speed separator at least once a year (intermediate service intervals). The service KIT including the needed O-Rings comes with the machine or can be purchased directly from Alfa Laval or via Amazon.com.