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Old 06-06-2012, 10:38 AM   #12
Dinanstu
3rd Gear Member
 
Join Date: Dec 2011
Location: Toronto, Canada
Posts: 315
Improved bearings, better flow, better construction and better quality SS impeller is the Stewart water pump....

There is more to pump dynamics than the impeller, having said that - you won't find many plastic impellers in industrial applications.
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