Berkey Shower Head Filter without Head The Berkey Shower Filters are assembled in the USA from US and imported parts. The Berkey Shower Filter is designed for those who want the benefits of showering in filtered water. May be used with your existing shower head. Also available with massage shower head already installed Designed to last for 25,000 gallons or one year, whichever comes first "Full flow" filter insures even distribution of water throughout the media Easy installation of replaceable cartridge with self-sealing threads Back Flush Attachment to prevent premature clogging Reduces chemical absorption and vapor inhalation Effective for both hot and cold water Reduces damage to hair and skin Eliminates dirt and odors Reduces free chlorine, hydrogen sulfide, scale, and iron oxide (rust water) BPA free Do not use with shut-off valve