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EMC2 · 02-23-2002, 03:59 PM

As far as a pump's head, the maximum head is the point at which it no longer pumps ANY water and is the distance between the pump output and the tube output. Of course, the pump flow rate drops off between the two ends (0 head and max head). It is basically another way to say how much back pressure they can handle

You can have ZERO height difference in your system and still have NO flow if the pressure loss (flow resistance) was high enough in your system components.

<edit> As far as the 76" issue, it all depends on the flow restrictions of your system and how much real flow you want. Again, you can compare it to the Eheim 1250 that a lot of people here use.

02-23-2002, 03:59 PM	#11
EMC2 Cooling Savant Join Date: Feb 2002 Location: Dark Side of the Moon Posts: 365	Can't believe he's talking about head :-P As far as a pump's head, the maximum head is the point at which it no longer pumps ANY water and is the distance between the pump output and the tube output. Of course, the pump flow rate drops off between the two ends (0 head and max head). It is basically another way to say how much back pressure they can handle You can have ZERO height difference in your system and still have NO flow if the pressure loss (flow resistance) was high enough in your system components. <edit> As far as the 76" issue, it all depends on the flow restrictions of your system and how much real flow you want. Again, you can compare it to the Eheim 1250 that a lot of people here use. Last edited by EMC2; 02-23-2002 at 04:02 PM.