[–] derram 0 points 2 points 2 points (+2|-0) ago
[–] Shilly_Mc_Shillface 0 points 1 point 1 point (+1|-0) ago
Check valve is usually what craps-out. Airsoft pellet 6mm works as ball replacement.
[–] TrollingForBasss 0 points 1 point 1 point (+1|-0) ago (edited ago)
The "one way valve" (I.e., the check valve) does have a moving part in it: a rubber stopper.
Still, the idea of using boiling water to run an air lift is ingenious.
[–] RedditHater 0 points 1 point 1 point (+1|-0) ago
Doesn't the check valve count as a moving part?
[–] CobraStallone 0 points 3 points 3 points (+3|-0) ago
Cool engineering. Bad coffee, those coffeemaker usually only get up to like 60°C, you need like 85° for proper extraction.