Starting A Bunch of DDC pump testing, What would you want to see?

[Martinm210]

Alright, I'll see what I can do.

Coolmeister did send me an EK G3/8 top, I just need to order some barbs for it. I'll see how it compares to the G1/4 EK top. Considering how small the volute chamber is, I'm going to guess bigger isn't really better on the inlet for pressure.

I also just tried the DDC3.2 minimum voltage startup and it actually fires up at around 5.8V, so you could also probably run a DDC 3.2 at 7V with the molex trick or a fan controller. The 13.0V maximum may actually be 12.99V. I'd be afraid to run one near 13.0V, it would only take a small increase in household current to throw it over the cutoff point, then you have no pump turning on.

And I can try some of those questions too, Series close together vs far apart, elbow inlet, etc.

I also now have a good sound level meter thanks to Kapt for the donation, so I'll gather some db results. Unfortunately I don't have a very quiet house, two young kids and TV blaring, but I'll try to gather what I can. I'd call it completely silent up to 9V, and quiet beyond that assuming the pump is isolated from vibrating against something.

With just the DDC 6" measurement from pump, if ambient noise is 53db, 9V = 53db, 11V=56db, 12V=58db, 13V=59db. Pump noise also depends alot on flow rate where low flow/high restriction is much quieter than low restriction/high flow.