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Originally Posted by rpalamara
Bobo, from what I understand it wont increase the max flow rate, but for a given system the flow rate will increase over 1 pump? If you look at a graph of the flow rate vs pressure of a pump and a water block system, the system will run at the intersection of the two functions. Since the pressure is increased, the two lines will intersect at a later point of increased pressure and flow rate. Please correct me if I am wrong.
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Agreed but i was talking about the pumps not the system. Doubling the pump flow rate will not double the system flow rate. I was trying to give a picture of pump not system performance.
Its a theoretical thing. The effective pump graph made by two pumps in parallel is the same as the same as the pump graph made for one except the effective pump flow rate is doubled. the other case of two pumps in seris produces double the effecitve head but no extra flow. In real life this is not the case because the pump theory is not perfectly in line with how real pumps function.
In fact under certain cases the extra resistance of parallel tubes and extra head may lower system performance.