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Long Haired Git · 08-15-2003, 10:48 PM

1. In my opinion, 5 LPM is a good target flow rate. That's "litres" people, as in the 20th century base ten measurement. You poor people stuck back in the 19th century, using base {anything} for measurements will keep getting confused. There are even multiple definitions of how much a gallon is. US = 3.785, English = 4.545 and then I think there are multiple versions of gallons anyway. Assuming standard US definition, 18 LPM (5 GPM) is HUGE, way too much.

My rule of thumb is:

Flow <= 1.0 LPM = too small, try again. Throw the pump out, or at least check for restrictions and kinks.
1.0 LPM < Flow < 3 LPM = acceptable, but borderline. Should have gone for a better pump
3.0 LPM < Flow < 8 LPM = Sweet spot
9.0 LPM < Flow < 10 LPM = acceptable, but borderline. What gains has the expensive pump got?
10 LPM < Flow = What are you trying to acheive here?

I will gladly accept donations of an entire model-range of a manufacturers pumps to test it out....

08-15-2003, 10:48 PM	#20
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	1. In my opinion, 5 LPM is a good target flow rate. That's "litres" people, as in the 20th century base ten measurement. You poor people stuck back in the 19th century, using base {anything} for measurements will keep getting confused. There are even multiple definitions of how much a gallon is. US = 3.785, English = 4.545 and then I think there are multiple versions of gallons anyway. Assuming standard US definition, 18 LPM (5 GPM) is HUGE, way too much. My rule of thumb is: Flow <= 1.0 LPM = too small, try again. Throw the pump out, or at least check for restrictions and kinks. 1.0 LPM < Flow < 3 LPM = acceptable, but borderline. Should have gone for a better pump 3.0 LPM < Flow < 8 LPM = Sweet spot 9.0 LPM < Flow < 10 LPM = acceptable, but borderline. What gains has the expensive pump got? 10 LPM < Flow = What are you trying to acheive here? I will gladly accept donations of an entire model-range of a manufacturers pumps to test it out.... __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)