Choose 3/8″ for the AQUAvalve5 (gray/black) that works with Grommeted trays, the 12.4 gal Hard Tank, Tray2Grow System and 3/8″ fittings.

Choose 3/8″ – 1/4″ that works with the 12.4 gal Hard Tank with grommeted trays using old AQUAvalve4’s (black/red) with 1/4″ fittings.

Top Hat Grommets provide a water tight connection with the 12.4 gal hard tanks.

The Top Hat Grommet is positioned at the bottom of the reservoir. All AutoPot 12.4 gal hard tanks are now supplied drilled and with 3/8″ Top Hat Grommets.