This kit is recommended for use with all Doulton® single and multi-stage filters. It includes all the components necessary for installation:

John Guest 3/8″ push fit connector to 7/16″ UNS
John Guest 3/8″ push fit connector to 1/2″ BSP
3/8″ Equal Tee
3/8″ x 1/2″ BSP (P) Stem
3/8″ Check Valve
White 3/8” LLDPE tubing
Installation Kit fitting instructions

Installation Instructions