Air Compressor Services' E9-16-09 replacement coalescing filter is your last line of protection for your compressor against oil mist and water in the air lines. The separator in your air compressor is restricted in terms of producing oil free air. Air Compressor Services Hankison Coalescing Filter Replacement E9-16-09 cleans the remaining water and oil from your compressed air system, ultimately preventing damage to your equipment requiring virtually oil free air for optimum performance. Using this filter can prevent harmful contamination present in the compressed air which could possibly cause failure of your equipment. Monitor your differential pressure on the compressed air housing to determine when to replace your E9-16-09 coalescing filter.