DDC Pump Version Differences & Evolution

[dsumanik]

I was just wondering if anyone out there had done any comparisions of the different version of DDC pump that have come out over the years. It would be interesting to develop a quick reference to see the actual gains/losses by the different models, even with the stock tops just to see the performance difference on the pump alone.

As far as I know this is the DDC model family??

DDC 1 = 12W Max
DDC 2 = 18W Max
DDC 3.1 = 12W Max
DDC 3.15 = 12W Max
DDC 3.2 = 18W Max
DDC 3.25 = 18W Max

Common Specs between versions:
8-13.2V, 9V startup
Max 21.75PSI
Have I missed one?

I Found these on Laing Website, the last graph is confusing as it is rated in amps..and it looks like it exceeds 18W limit in DDC 3.2 & 3.25 (1.5A):

DDC 1 & 2
DDC 3.1 & 3.2
DDC 3.1 - 3.25

Using Data from these tables I plugged them into my own spreadsheet, rounding plot points to nearest .5 ft of head pressure. So it is not Exact, but it gives you a rough idea of the rankings...based on Laing's in-house testing results.




Here are the combined results of all the data. However keep in mind both the DDC 3.2 and 3.25 have more amperage applied on this graph than the other pumps, so this data is NOT directly comparable.



As such, in reality, I would say the DDC2 is the overall winner, it hangs in there with the best of them...even undervolted.

If we go on this graphs data alone:

High Flow (> 1.5GPM) = DDC3.2 > DDC3.25 > DDC2
Average flow (1-1.5GPM)= DDC3.25 > DDC3.2 = DDC2
High Restriction (< 1.0GPM) = DDC3.25 > DDC2> DDC3.2

Looks like DDC2 was ahead of its time, DDC 3.2 is a mixed bag, DDC 3.25 overall best.

DDC1, DDC3.1, DDC3.15 all sux lol