To test pumps I use a flow meter and a differential manometer and vary restriction by adjusting a brass gate valve. I adjust the gate valve to give different flow points and measure the pressure “gain” across the pump using the differential manometer. To understand how to read these plots check out this guide.
D5 Vario Performance:
D5 Strong Performance:
The top performs very well regardless of the ports used. If we compare to other tops we see that it is near the top:
Summary – Gold Award A fairly priced high performance top that covers the pump body completely. The option to add a reservoir is nice and a 120mm reservoir can be added for only $24 extra which is pretty affordable. My only niggle is that Koolance could have done more with the pump mount to try and isolate vibration.
Where to buy: PPCs
