Different pumps in the same loop

[KopengaKris]

Hi! I'm about to buy a D5 pump (VPP655) and a CPU waterblock, but I already have an DC-LT pump in my Eiswolf and I'm not planning to replace that. Will the DC-LT hinder the flow (pressure) from the D5? The 2 pumps will be right after each other, so this is the loop order. Res - D5 - DC-LT (Eiswolf) - Rad - CPU block - Rad - Res

 

[Eddy]

If you put in a stronger pump, just run the DC-LT along with it. This would not be a problem and only minimally impedes the flow. If you leave the DC-LT off, then the resistance is somewhat higher.
Otherwise, it does not matter where in the circuit the pumps are installed. Whether directly behind each other or distributed in the circuit, makes no difference at all.