Quote:
Originally posted by MadDogMe
How do pump manufactureres determin head?, I mean do they measure it 'in tube' if so which size?, different sizes would make a difference to the flow rate at various heads would'nt it?...
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I'm not sure how they do it, but the tubing size used wouldn't matter so long as they included its resistance to the measured vertical lift for the test. Determining the max lift is easy, as the tubing size doesn't matter at all.
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