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#1
12-08-2005, 03:00 AM
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Its usually a bit criptic in the pumps model designation. If you search through all the pumps, there is usually a pressure series and a non pressure rated series in a given brand. For example the Iwaki RLT series pumps are pressure rated, the RLXT pumps are not.
Any pump will handle the pressure up to a point, beyond wich its efficiency will drop significantly. Pressure rated pumps are just designed to do it more efficiently. If you look at the pumps performance curve, you will see what its flow will be for a given head pressure. If you start by figuring oput your plumbing and from that you approximate head pressure, then you can choose a pump that meets your needs. There are a few good headloss calculators on various internet reef sites. Reef central has a good one, I know I have seen others too but can't list them off the top of my head.
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I retired and got a fixed income but it's broke. Ed _______________________________________ 50 gallon FOWLR, 10 gallon sump. 130 gallon reef, 20 gallon sump, 10 gallon refugium. 10 gallon quarantine. 60 gallon winter tank for pond fish. 300 gallon pond with waterfall. 
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