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What is the vertical lift 6'?
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Need Recommendation - QUIET external pump
- Thread starter jef4y
- Start date
JeF4y;781384 wrote:
So is there any particular reason why the Panworld/Iwaki type designed pumps would be better than a bigger Maxijet/QuietOne/Eheim?
An external pump doesn't add as much heat as an internal, is about the only thing I can think of.
Vertical lift is about 5', but at the 3' point it T's off from one to 2 vertical climbs.
Dave, when I refer to the different types of pumps I'm talking the big massive round motor kind vice the smaller plastic box type.
My thought on it is that the big round type (iwaki, panworld, etc) have higher HP and can overcome head/back pressure with much less loss. But I don't know...
Dave, when I refer to the different types of pumps I'm talking the big massive round motor kind vice the smaller plastic box type.
My thought on it is that the big round type (iwaki, panworld, etc) have higher HP and can overcome head/back pressure with much less loss. But I don't know...
While horse power plays a factor (after all it must overcome the torque exerted on the shaft) a bigger factor is the type of impeller and diffuser used. Back in the dark ages (1979 to be exact) I worked in an underground uranium mine (yes my wife wears sunglasses to bed and I have to shave my teeth every morning.) We used Flyte submersible pumps that were designed with a Maximum head pressure of about 500' with a 4" discharge. We would remove spacers in the diffusers and impellers and literally "Burn" the impellers in to the rubber on the diffuser We were pumping a full 4" line 1600' but just not for long. LOL
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You are correct Jeff that most external pumps have higher hp . Some overcome higher head pressure and some are designed for low head/circulation applications. They also usually draw more watts. Look for a pump that has a performance curve that your head height loss falls somewhere in the middle of. The Marinland,Quite one, Sicce and Eheim all can be run externally and are much quieter IME than any of the external ones. If you are thinking that the higher hp of panworld/blueline pumps will equate to longevity it will not. It really is more important to match the performance curve as mentioned .
