Ideal for Ebb & Flow trays.

The 13mm (inlet) fitting is used to pump nutrient into the tray (flooding), while the 19mm (outlet) fitting with the extension sits higher in the tray.

Once the nutrient level in the tray reaches the height of the outlet screen, the excess nutrient drains back to a reservoir underneath the tray..

The extention can be adjusted for more height, and extra extentions can be added for a deeper tray.

These fittings are supplied as complete kits, with both a 13mm barb and a 19mm barb included, and come with 2 screens and 2 extensions.