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Old 09-17-2015, 05:20 PM
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mach4 mach4 is offline
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Join Date: Jul 2011
Location: San Diego County, CA
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I wouldn't sweat the sheet metal impeller. Obviously a cast one would be better but it's not a deal breaker. I think most of the critical difference is in the effects of corrosion in a neglected system - it's going to take longer for a cast impeller to corrode to the point of failure.
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