Two-piece hydroponic dispenser with a removable coarse-thread ½-inch hose barb

This two-piece hydroponic tower dispenser uses a removable, fully printed hose-barb fitting. Separating the fitting from the dispenser makes both pieces easier to print and allows the barb to be replaced without reprinting the entire dispenser.

The removable fitting uses a coarse 16 mm × 2.5 mm printed thread with added clearance for typical FDM printers. It connects to ½-inch inside-diameter flexible tubing and includes three retaining barbs, so it is designed to hold the hose without a clamp. The internal water passage is approximately 7 mm.

The download includes:

• Threaded hydroponic tower dispenser

• Removable ½-inch hose-barb fitting

• Coarse FDM-friendly printed threads

• Three hose-retaining barbs

• O-ring sealing groove

Recommended print settings:

Threaded dispenser:

• Filament: PETG recommended

• Alternative: ASA for increased UV and heat resistance

• Layer height: 0.20 mm

• Walls: 5–6

• Top and bottom layers: 6–8

• Infill: 30–40% gyroid or cubic

• Supports: Normally not required

• Orientation: Print with the dispenser’s broad, flat bottom on the build plate

Removable fitting:

• Filament: PETG recommended

• Layer height: 0.16–0.20 mm for cleaner threads

• Walls: 5–6

• Infill: 70–100%

• Supports: Normally not required

• Orientation: Print vertically with the hose end on the build plate

• Brim: Recommended if bed adhesion is limited

A 16 mm inside-diameter × 2 mm cross-section O-ring can be installed in the sealing groove. A small amount of food-safe silicone grease can help the threads turn smoothly and improve the seal.

Thread the fitting in by hand and avoid overtightening. If the hose is difficult to install, warm the end briefly in hot water before pushing it over all three barbs.

AI helped my make the model but I printed it and tested it myself. It works great.