Been looking at the Koolance PMP-500 as a replacement for my X20 750 V2 for a while now, what reviews I can find on it it scores very well.
http://martinsliquidlab.org/2012/12/13/koolance-pmp-500...
Just occurred to me that it doesn't really fit any of the OEM pumps described in the Sticky. It visually looks like an Eheim pump, which are described as needing a DC-AC converter to run and having relatively low head pressure compared to DDC and D5 pumps. The PMP-500 is praised for its strong head pressure and from the looks of the Martins review, doesn't require any converter to use, just a Molex connector.
At one point in the review Martin comments that the Impeller is similar to an Iwaki pump.
So can anyone identify what kind of pump it is? A modified Eheim or Iwaki, or is it an original design from Koolance?