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  • Inlet/Outlet:
    • Flange
    • 3/4in FPT
  • Materials:
    • Bronze
    • 304 Stainless steel
  • Max internal pressure: 150 PSI
  • Max temperature: 250°F
  • Max Flow: 14 to 22 GPM
  • Max head: 8.5ft


The March Pumps 821 series of seal-less, hydronic pumps are a hot water booster series built to handle liquid transfer in heating and cooling operations, making it ideal for hot water and hot oil systems. These are centrifugal magnetic drive pumps with a 1-Phase 115 or 230V 0.05HP fan cooled motor, which can be run on either 50 or 60Hz (with performance differences between the Hz options). These pumps are not self-priming, lack a suction lift, and require a flooded suction. They cannot be run dry. Wet end options include stainless steel or bronze options. Additionally, the 821 series can run with a maximum internal pressure of 150 PSI and liquid temperature of 250°F.