The Omnipure Q5620 Block GAC filter is very user-friendly. Replacement of the spent media bed is done quickly by detaching the filter body from a permanent head with a twist of the wrist. The new Q5620 filter body is just as easily threaded into the head and the replacement is then complete. The Omnipure Q5620 is also available with the optional Twist Tap in-head valve system, which automatically turns the supply water off when the body is disconnected from the head. The Omnipure Q5620 Water Filter can be used in icemakers, refrigerators, beverage equipment, drinking fountains, undersink systems, and reverse osmosis systems. The Omnipure Q5620 GAC water filter is a granular activated carbon block filter used to reduce cysts, sediment, taste, odor and chlorine taste and odor.