Active Aqua 3/4" Fill/Drain Fitting - Pack of 10

The primary difference is flow capacity — the 1" fill/drain fitting moves a larger volume of nutrient solution per cycle, making it better suited for larger flood tables. The 3/4" fitting is appropriate for smaller to mid-scale tables where moderate flow is sufficient and the drain port is sized for 3/4" fittings.

In a flood and drain system, fill/drain fittings are installed in the drain ports of the flood table. During a flood cycle, a reliable pump such as the Active Aqua Grow Flow Bottom-Draw Pump pushes solution up from the reservoir through the fill fitting into the table. When the pump stops, gravity drains the solution back down through the fitting and into the reservoir.

Most standard flood and drain setups use two fittings per table — one for the fill line from the pump and one for the overflow/drain return to the reservoir. The pack of 10 covers up to five standard two-fitting table setups, making it well suited for multi-table grows or shared facility builds.

This fitting is sized for 3/4" inside diameter tubing. Using undersized tubing will restrict flow during flood cycles and slow drain times, while oversized tubing won't seat on the fitting barb securely enough to prevent leaks. Active Aqua 3/4" ID Black Vinyl Tubing is a compatible option available separately.

The 3/4" fill/drain fitting is a standard size used across many hydroponic brands, so it will physically fit any table with a standard 3/4" drain port, such as those found on an Active Aqua 2.0 Low Rise Tray. Measure your existing drain port before ordering if you're working with a non-Active Aqua table.

Fill/drain fittings typically install through a pre-drilled hole in the flood table bottom, with a locking nut tightened from the underside to create a watertight seal. If you need to create or enlarge a port, an Active Aqua Stepper Drill Bit provides the precision needed to ensure a clean, leak-free fit.