The K2533-KK In-line Chlorine Taste and Odor filter features 3/8" Quick-Connect compression fittings that allow for installation and replacement in a matter of seconds without the use of tools. The Omnipure K2533-KK 3/8" Quick-Connect fittings are molded directly into the filter body, reducing the chance for LEAKS. The cap and body are spin-welded together producing a smooth, consistent seal without the use of glues or binders that can cause problems. The K2533-KK In-Line filter is used as a post filter with many different "standard" R.O. systems.