Reduce pump speed using a quiet fan adapter.

M

Miteus_St
Member

56

10-28-2023, 09:30 AM

#1

I own the Koolance PMP-400 (Laing DDC 3.25) pump without PWM, just a single 3-pin molex power connector. I’m curious if it’s feasible to safely reduce the pump’s speed using a low-noise fan adapter. The Noctua adapter can lower a fan to 7 watts, according to their site. I don’t want to purchase a 50 dollar fan controller just to adjust the pump’s speed permanently. Additionally, if lowering the wattage works, would that also reduce the pump’s current draw below 1 amp so it could run on a 1 amp motherboard fan header? Thanks for your assistance!

K

karuu91
Member

140

10-28-2023, 12:51 PM

#2

According to the specifications, the pump requires 9V to start and maintains a minimum voltage of 8V while running. The low-speed adaptors use a resistor to reduce the voltage to 7V, which is insufficient for starting or operating the pump.

T

TheKitty2016
Junior Member

12

10-28-2023, 01:49 PM

#3

According to the specifications, the pump requires 9V to start and maintains a minimum voltage of 8V while running. The low-speed adaptors use a resistor to reduce the voltage to 7V, which is insufficient for starting or operating the pump.