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Injection pump mixing unit with insulation. Grundfos UPS 15-58 three speed pump. Grundfos Alpha 25-55U pump. Temperature gauges. Shut-off ball valves. Male union connections

The 165 series HydroMixerTM provides high temperature flow direct to secondary heating circuits, complete with onboard three-speed or variable-speed pump, supply and return temperature gauges, secondary circuit shut-off ball valves and pre-formed insulation shell. Versions are available with either the three-speed Grundfos UPS 15-58 pump or the variable-speed Alpha 25-55U pump.

The unit can be ordered with supply flow and pump on the right or left side, and the unit is field reversible to accommodate changing installation requirements. The adjustable differential pressure by-pass valve, code 519600 and wall bracket code 165001 are optional. The unit comes with male union connections which require separately purchased, 1 inch sweat or HPT, top outlet or bottom inlet fitting kits.

Connections: Male Union Threads
  • top outlets: 1-1/4" male straight
  • bottom inlets: 1-1/2" male straight
  • inlet/outlet center distance: 5 inches (125 mm)
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Connection Size:


Max Pressure (PSI):


Power Supply:


Temperature Range (F):

32°F to 130°F




Grundfos 25-55U Alpha Pump


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