Laminar Flow Garden Hose Head (mk2)

In stock · Made-to-order resin · Ships from Auckland · Free shipping over $75

Material

PLA (filament)

Colour

Grey

Weight

~40 g

Print time

~4.5 h

Shipping

$10 std · $20 express

Lead time

1-3 d print + 1-4 d ship

Versionsmk1 - 2020-08-31 mk2 - 2025-06-04 mk3 - 2025-06-06 IntroLike so many late-night YouTube voyagers, I was hypnotized by those crystal-clear “glass rods” of water pouring out of laminar-flow nozzles. Thanks to 3D printing—and the ability to swap files with strangers on the other side of the planet—I wondered: Could we skip the hardware-store scavenger hunt and make a nozzle you can download and print in one shot? My first crack at it, inspired by Jarom’s “Ultimate Laminar Flow Nozzle” on The King of Random and later spotlighted on Prusa Live #26 (Matt’s “PrusaPrinters Picks”), almost nailed it. It did produce laminar flow—but only at gentle rates, and it still needed a pile of screws, gaskets, and off-the-shelf plumbing bits that loved to leak. So here’s the reboot. This version is a true print-in-place design: drop the file into your slicer, press Print, and go make coffee. No combing the garage for the right thread, no spelunking for lost nuts, and definitely no 200-piece straw bundle. Just one print, one purge, and a flawless glass-rod jet. Key improvements from mk1 –Square (now Pentagonal in mk2.2) bodyLarger internal volume – than a same-footprint cylinderSideways printing – means no tall Z-height and the water flows with the layer lines, reducing turbulenceHexagonal tubes in Straightener StageA “squeezed” hexagon lattice replaces the original cylindrical array:Self-supports at 45 °—no steep overhangsProvides the > 40 L/D straightening ratio needed for crystal-clear flowInterchangeable Outlet lensesModular “lens” system lets you experiment with different jet diameters, materials, and finishes6 mm, 7 mm, and 8 mm inserts includedVersion mk2.2 “fat”Release 2025-06-14 Keeps smaller form factor than mk3 but increased print time from mk2.0 / mk2.1No screws!Hexagon body to reduce overhangs and assist towards a single print designIncreased width, reduced length - ie. “fat”Supports uniform pressureInitial testing shows a much superior laminar results vs 2.0 / 2.1 and would highly recommend choosing this version for your printsVersion mk2.1Release 2025-06-13 Brings some mk3 improvements back to mk2 Removes taper towards the exitNo supports neededDiffuser Stage built-in to print as well (introduced in v2-beta)Re-introduces interchangable lensesVersion mk2.0MaterialsQtyItemPurpose13/8" O-ringGardena connectorPrinting notesDesigned for a 0.4mm print nozzlewhen slicing, ensure hex pattern walls are 1 extrusion widthUse a high-infill % as there is not much internal voids, but where there is – it lends strength to things like the hose attachmentsIncrease bridging speeds over the defaults or the print will take a very long timeLots of bridging is used in the initial Settling Stage and it is not important if there are artifactsIncreasing water seal where the lenses attachWith no lens mounted – rub a little silicone sealant around the lens holder area and on the back of the lenses Let cure for the amount designated on the instructions