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I need a pump that will produce around 1000gph with a 1/2" intake. Any specific brand recommendations- I'm having trouble finding 1/2" that will pump this amount.
HELP!
I don't think you're going to find one. 1/2 is just too small for that amount of flow. Most circulation pumps this size are going to have 1" inlet and outlet...some will have 3/4".
If you're looking for an external pump, I'd recommend a Blueline 30HDX which is rated 1110 gph and will flow about 760gph @ 4'. The 40HDX is rated 1270gph and 1020 @ 4' head. If you want a submersible, I'd go with a Mag 12 which is rated about 1100 @ 4' head.