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 https://www.bricklink.com/v2/catalog/catalogitem.page?P=19467c01 Lego Pneumatic Pump Small (6L) V2 with Reinforced Cylinder https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0875 Lego Pneumatic Switch with Pin Holes and Axle Hole https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0874 Lego Hose Pneumatic 4mm D. V2 https://www.bricklink.com/v2/catalog/catalogitem.page?P=21825 Vacuum Pressure Gauge https://www.amazon.co.uk/dp/B07WK3CD2M/ Temperature Sensor PMTEMP2 https://www.amazon.co.uk/Velleman-PMTEMP2-Digital-Thermometer-Multi-Colour/dp/B01N5PZ2M3