Pump High Efficiency 1 1/4"Pump High Efficiency 1 1 4" High efficiency variable speed circulator pump sized for larger hydronic systems, with multiple control modes and low power draw. Key Benefits Includes 1 1 4" NPT stainless steel flange union Multiple operating modes: auto, proportional pressure, constant pressure, constant speed, night setback ECM efficiency for lower electrical consumption LED display for quick performance checks (watts, flow, RPM) Quiet, robust
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