Thanks for playing! The pump is a 2-part puzzle and rotating those pipes is the first part. You also need to provide power to the pump before it can do anything. The turret in the centre of the island is what powers the puzzles but the turret must also be powered! This is done by aligning the offshore light refractors to the turret, then you can start powering things.
Ah, thank you for confirming that, yeah, I checked the gameplay video on YouTube after an hour and a half of playing and, I had a hunch those light refractors need to be aligned but spent 40+ minutes on that second one and just couldn't get it right. You can't win them all, still made for a nice post on Locals . :)
Maybe one day I'll open that vault. It's a cool project even not getting to the end. :)