DD4 and DD5 pumps

[turbolude]

I have an older D4 pump and was wondering if its worth getting a D5? any recomendations?

 

[madmat]

Does the sound the D4 makes bother you? If not I'd just stick with it. On the flipside, if it does then get the D5.

 

[mwin]

The D5 is ALOT quieter. I've got my D5 running at full blast and it's a good bit quieter than my D4 at 7 volts. They say it flows more, but I don't really have any way to test that.

 

[turbolude]

im more worried about flow. also i was thinking just get a second one and run it in series for better flow since im running a trip rad