Autopot easy2Grow Extension Site Watering SystemThe easy2grow extension kit comes with everything needed to add more pot sites to an existing easy2grow System! The easy2grow Extension Kit is supplied with the following: (x1) 2Pot tray and lid (x2) 2. 2 gal or 3. 9 gal pots (x1) AQUAvalve5 (x1) 3 8 tee connector (x1) 3. 3ft of 3 8 pipe (x2) Root Control Sheet (x2) PotSock Square All AutoPot USA modules are now equipped with the new AQUAvalve5 (gray black with black collar), which requires 3 8 tubing