How do I flush the water system after connecting the refrigerator or changing the filter?

After connecting the refrigerator to a water source, dispense water into a sturdy container until you draw and discard 1.5 gallons (5.4 L) of water, or for approximately 3 minutes after the water begins dispensing. This cleans the water system and clears air from the lines, which may cause water to spurt out initially. (Page 6)