We stock a full range of Premium USA Omnipure Replacement Q Series 12 Inch Water Filters. The Q-Series is the ultimate “user friendly” inline filter on the market. Replacement of the spent media bed is completed , in a matter of seconds, by detaching the filter body from a permanent head with a twist of the wrist. The new filter body is just as easily threaded into the head, and the replacement is then complete. You are viewing our range of Omnipure Q-Series 12" x 2.5" replacement water filters.