The pump I have is a hd-20.. I use that one cause the flow requirements for my chiller is only 240 which is exactly what I get with the hose overhead. I use the fan cause my pump does not have a built in cooling fan. I wish it did. The hd-40 is better then iwaki as it is quieter and runs cooler. Hope that helps.. wanted to get the reply in before i shut off my machines.. bad storm rolling in..
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Experience: 16 Years Salt Water
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