Product review (5 stars): Versatility of Filter & Air Bubble Prob
This product will fit Kenmore and Whirlpool since Kenmore refrigerators that use the 9020/9030 filter were manufactured by Whirlpool-KitchenAid.

The air bubbles are normal.  Per the manual, when installing the filter you need to flush the water system. You need to press the water dispenser button for 5 seconds then release for 5 seconds; repeat until water begins to flow.  THEN continue for another 5 minutes (pressing and releasing every 5 seconds) to flush the air from the filter.  That is what the manual says anyway.  I doubt I'll be pressing and releasing every 5 seconds for 5 minutes!