Claris - Gen 2 Filter HeadYou only need to purchase this for first time installs! This is the filter head that will connect your filter to your water supply. Next generation filter head designed exclusively for use with Claris replacement cartridges. 3 8 NPT. Head features: Tamper proof bypass settings Fast change out locks with only a 45 turn Built in flush port Auto shut off Quick and easy adjustable bypass; key provided