Venturi water pump w/ concentric nozzle (aka Infinity Jet) for garden hose

thingiverse

This is a Venturi water pump, featuring a concentric continuous nozzle. I sought out a pump that could effectively draw in sandy water from rain and drainage pipes while also allowing me to hone my Fusion360 modeling skills. Other Venturi pump designs I discovered on Thingiverse were somewhat functional but either flimsy or prone to clogging easily. If you search for this type of design (Infinity Jet), you'll find that it's used in gold sand dredging and ROV substrate removal, touted for its efficiency and unclogability; however, the available sizes start at 2", which is far too large for a garden hose-powered pump. The suction-outlet path minimum cross-section diameter measures approximately 18.9 mm, making it capable of handling even small gravel. Through various iterations of this design, I discovered that a 0.3mm nozzle gap worked exceptionally well under my garden hose pressure (at least emptying a bucket in mere seconds). In failed versions, 2mm and 1mm nozzle gaps yielded laughably little suction but provided an acceptable watering nozzle experience. Consequently, the nozzle gap should be relatively small, ranging from 0.05mm to 0.5mm, depending on pressure and flow requirements. Given that the original design weighs approximately 130g for PLA, I also created a refined version that maintains functionality while reducing weight to around 90g total. Two nozzle variants are available for this refined model: 0.3mm and 0.2mm gap. If you require a different nozzle gap, please ask, and I will upload it. Pump connections (all male): - Pressure input: 1/2" - Suction: 1" (3/4" for the refined version) - Outlet: 3/4" (tip: install a ball valve here for priming)