Quote:
Originally Posted by Razor6
A res is like a large diameter pipe so the resistance is extremely small for the ammount of water we flow. The way in which the water enters and exits the res can obviously affect the head loss though, I think that's what AngryAlpaca meant. If you have a res where the inlet comes straight in the bottom and exits straight out the top then what you've added is a big pipe.
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hmm - surely what you've added is a big pipe
with some air trapped in it