Laing DDC-12 Plus,http://www.coolputer.fi/non-ses/tiedot.asp?t=1392&lang=eng
I tried to silence it as much as possible, the pump is now hanging from a rubber band. The 1st problem I had was to use quick connector to connect my external radiator, and those plugs seemed to be quite restrictive http://www.coolputer.fi/kuva.asp?t=1230
, So I changed them to the smallest air brake quick release (1/4") with lock on both end. Now the ticking sound is gone. But the noise of that pump is the same as a small brush motor at about 4500 to 5000 RPM.
I obviously want this noise gone... I really like the idea of a 12V pump as starts and stop at the same time as the computer. I do have a EHEIM 1048 ( can't hear the thing going) 240V pump to help the bleeding and emptying, but it needs to be outside and runs continously. There is an EHEIM 1046 12V, I will probably buy that one too with a normal DDC12 (no plus), try both and keep the better one.
If the heat get's too high because of the pump, I'll just get another Cape Cora pack of 6.
Too bad I can't attach the picture of the quick connect I got, I am sure many would like them a lot.