LEGO Compact Pneumatic Compressor/Valve Unit [WITH INSTRUCTIONS!] - YouTube
technic - Which sets currently contain pneumatic LEGO equipment? - Bricks
A beautifully-designed LEGO pneumatic compressor | Arduino Blog
Amazon.com: Build 19 Piece Pneumatic Kits with Technic Parts Contains Air Pump, Piston Pressure Rod, Air Lines, Pneumatic Parts Perfect for DIY, MOC Tech, Compatible with Lego (35) : Industrial & Scientific
MOC Bricks Technical Parts Pneumatic Pump Small (6L) V2 with Reinforced Cylinder 47225 19478 4697 Compatible With 8800 Blocks - AliExpress
Lego pneumatics - Wikipedia
LEGO part 26288c01 - Blue Pneumatic Pump Large (11L) with 1 x 3 Liftarm at BrickScout