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[–] TrollingForBasss 0 points 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.

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[–] Shilly_Mc_Shillface 0 points 1 point (+1|-0) ago 

Check valve is usually what craps-out. Airsoft pellet 6mm works as ball replacement.