Venturi water pump

thingiverse

This water pump design, created for emptying a pool filter, uses garden hose pressure to move water or slurries. Efficiency parameters and hose/pipe connections are adjustable, featuring a single-piece construction with no moving parts. The print envelope fits in a 10x10x10cm space, requiring almost solid infill and multiple shells for optimal waterproofing; ABS material is recommended for better sealing when treated with ABS+acetone paste. It's designed to fit a standard 40mm PVC pressure pipe (with an inner diameter of 43mm) and requires a 1-inch thread garden hose adapter, commonly found with spray nozzles. The pump's operation relies on the garden hose pressure turning into high-speed flow, generating a vacuum for liquid suction. The throat length affects impulse transfer and friction losses, while adjustable ratios between throat area and pipe area determine outlet pressure for customized flow rates. Safety note: always submerge pump before using with garden hose to avoid injury due to high pressure.