Low flow in cooling loop

[belezeebub]

I think I might have a bad or failing pump, I am getting 9 to 13Gallons per HOUR Max out of a Pair of Swiftech MCP 35’s I am using the koolance dual pump single 5.25 reservoir bay a Koolance 180-Degree Connector to tie the pumps together, The pumps work, they are not loud, I would guess I have 15 feet of 1/2 tubing most of which is laid horizontal a total rise above the pumps of maybe a foot my water flow goes Radiator/ reservoir /CPU/MB/Video1/video 2/raidator2 in a single loop my temps are great with folding at max I will touch 48c temp in my loop, and all tubing has anti-kink coils, I would have expected dual pumps to handle it and have a lot more flow then what I am getting, any suggestions?

FYI
I am using a Aquero 6 with a matching Aquaero Flow High flow PN#53068 sensor it was auto detected by the controller and doesn't need to be calibrated with 3 140.4 radiators I have cooling to spare

 

[Xibyth]

What size is the tubing, and have you tried single pump.

 

[belezeebub]

What size is the tubing, and have you tried single pump.

15 feet of 1/2 tubing all with anti kink coils all tubing is Tygon

 

[Xibyth]

Its not always abnormal to have a low flow loop, but generally not that low. Based on the temps your getting I would venture to guess that your flow sensor is not operating as expected.

 

[belezeebub]

That is what Switftech told me also but the sensor is auto detected and auto calibrated with no adjustment needed and seeing when I disable 1 pump the flow doesn't really change I am thinking something in the loop is blocking the flow and that 13 GPH is all I can get just not sure what is blocking.

 

[Xibyth]

You can control the pump thru the motherboards pwm function, if your motherboard does not have software to control it you can use speedfan. I would also like to note that your pump at 100% is rated for 18 LPH which translates to 4.752 GPH. So in this case your flow rate is normal. So long as temps are holding well under full load I don't think there is anything wrong with your setup.

 

[belezeebub]

I have an Aquaero 6 and the pumps are rated at GPM I am getting Gallons per hour.
If I was using the stock pumps from Koolance they would be rated at 4.75 GPM (17.5 LPM) but I paid the extra and got the Swiftech MCP35X pumps