Thread: cheap hose
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Old March 15, 2013, 09:48 AM
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Quote:
Originally Posted by great_big_abyss View Post
Shouldn't apply, since it's a closed system. Theres's the same amount of water going 'down' as there is going 'up'. The weight of the water going 'down' cancels out the weight of the water going UP, therefore head calculations don't figure into it. The only thing the pump has to overcome is the friction of the water against the tubing walls, and the pressure created by the blocks.
Certain things are always true with centrifugal pumps

pumps simply will not deliver to heights above their rated head, and delivery falls off rapidly as max head is approached. Small tubing and tight bends just add insult to injury to delivery rate.

now if were talking displacement pump (gear/vane) i agree
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