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Max Head Or Displacement??..Which one??

post #1 of 4
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Well bascially i just wanted to know when choosing a pump i know there are two main specs to look at..the maximum head and the lph/gph it can pump, but which one is more influential on performance?? i see alot of people recommending the d5 vario which does 1500lph at max and has a 3.7m head (accourding to some sites) but the ddc-1t pro has 5.76m head and 933.5lph...for a highly restrictive loop would this pump not be the better choice??..
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post #2 of 4
yes it would.
post #3 of 4
The DDC would be a little better...But in a actual loop I doubt it would be much better...Since you have to buy an after market top for the DDC to get max flow I would just go with a D-5.....The old 18W DDC were killer pumps but they have been de-tuned now...
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post #4 of 4
The spec that doesn't exist that would probably mean the most to water coolers is what pressure at 1.5GPM or so because we never operate under either max head or pressure and what connects the two dots is far more important.

But of the two, max pressure is generally more important. Like ira said the difference is fairly small, the DDCs with top do a little better, but it depends which top as well. You can play around with the different pumps and tops in my flow rate estimator if you're interested in seeing how each would perform on your system.
    
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