Model 331
1/2 hp Portable Transfer Pump
1/2 hp.
This portable pump is perfect for boosting water pressure, draining hot water tanks and general water transfer. Features include a one-piece cast aluminum pump and motor housing with integral carry handle, permanently lubricated bearings, a convenient On/Off switch, and a powerful ½ hp motor capable of pumping to over 100 feet of head. Not intended for permanent installations.
  
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Model 331
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US Patent #7,537,439
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