Hello,

First of all, this is not my first loop by any means, but until now I never had a real way to measure flow rate. Now I got a sensor fitted (I experienced some issues with my reservoir so I decided to install one).

Loop is as follows:

Koolance RP-452x2 v2 reservoir with 2x D5 vario pumps in series at max speed
EK Supreme HF with 6th plate (the one with a fine line)
2x EK GT980 blocks in parallel
Alphacool 360 rad (normal width)
EK 360 rad (double width)
Back to reservoir.

All is mounted with soft tubing, 19/13.

When I was testing the resevoir and pumps alone I was able to get around 11.6 gal/min. Obviously this was with a short loop, no radiators or blocks, but I wanted to check that the reservoir configuration was fine.

With the whole loop mounted I'm getting sometihg about 1.7 to 1.8 gal/min. To be honest I expected something more...

Do you think this figures are ok? Maybe moving to hard tubing will help increase flow?

Thanks guys!