Lego Vacuum Pump

Quick build and test of a Lego pump that sucks air. It can generate a 70% vacuum. At the end I show another Lego way to create vacuum: Lego pneumatic pump pushing air out of a jar. This can generate a 63% vacuum. Water boiling test to prove the gauge was correct. Enjoy! 0:00 Build 1:23 Test 1:55 Test boiling water 2:27 Another build and test LINKS Lego Pneumatic Cylinder V2 2 x 11 Lego Pneumatic Pump Small (6L) V2 with Reinforced Cylinder Lego Pneumatic Switch with Pin Holes and Axle Hole Lego Hose Pneumatic 4mm D. V2 Vacuum Pressure Gauge Temperature Sensor PMTEMP2