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pump selection for irrigation system

pump selection for irrigation system

pump selection for irrigation system

(OP)
I need help selecting a pump for a unique and demanding irrigation application.  Here are the requirements:

-> 1-4 litres per minute (0.25-1 gpm)
-> 6-7m of head (19-23ft)
-> 6-24V DC solar powered
-> high efficiency
-> 20,000hrs or greater mean time between failure
-> low maintenance requirements

Submerged pumps are fine, suction pumps are fine, centrifugal, positive displacement, etc. are all fine, I just need something that can meet these requirements.  If the pump is a suction pump or positive displacement, the head requirement can be reduced, but it will be lifting the water instead.

Thanks for your help.

RE: pump selection for irrigation system

(OP)
Thanks, but those are a bit higher flow that I was hoping.  And defintiely outside my price range.  I was previously planning on using the Laing DDC2 pump:

http://www.lainginc.com/DDC-2.htm

but it has been discontinued and the replacement pump (DDC3.2) does not have sufficient head.  Short of running two DDC3.2 in series and doubling the cost, I am out of options.

RE: pump selection for irrigation system

Laing make good stuff, look around their site they make a lot of different pumps.  Also try Eheim.
That is a lot of head.  I don't know where to go for a PD that is that small and doesn't cost a fortune.

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