Grundfos

99163903 Alpha 2 In-Line Circulator Pump, 1-1/2 in Inlet x 1-1/2 in Outlet, 115V, 1 ph, Cast Iron

GRU99163903 MFG #: 99163903
99163903 Alpha 2 In-Line Circulator Pump, 1-1/2 in Inlet x 1-1/2 in Outlet, 115V, 1 ph, Cast Iron
  • Inlet Size: 1-1/2 in
  • Outlet Size: 1-1/2 in
  • Voltage Rating: 115 V
  • Amperage Rating: 0.1 to 0.65 A
  • Bearing Type: Radial
  • Dimensions: 6.38 in H x 3.82 in D x 6.5 in W
  • Enclosure Type: IP42
  • Frequency Rating: 60 Hz
  • Impeller Type: Composite
  • Manufacturer: Grundfos
  • Manufacturer #: 99163903
  • Maximum Head: 18.05 ft
  • Maximum Pressure: 145 psi
  • Motor HP: 0.0067 to 0.06
  • Phase: 1
  • Series: Alpha 2
  • Temperature Rating: 32 to 104 deg F Ambient
  • Type: In-Line
The ALPHA2 takes reliability in small domestic circulators to new heights. Even in systems where the operational environment is a challenge, the ALPHA2 will ensure long-lasting trouble-free operation with no risk of blockage. If you want to leave your customers with a completely trouble-free heating solution, the new ALPHA2 is a premium choice. ALPHA2 is versatile and efficient whether you use one of its seven speed, pressure control settings or simply leave it on the factory setting AUTOADAPT™. The ECM motor design reduces energy consumption by 50% and in AUTOADAPT mode, will automatically analyze the heating system, find the optimum setting, continue to adjust its operation to changes in demand and reduce power consumption by up to 85%. This to ensure the lowest possible energy consumption without sacrificing comfort.

  • Features
  • Product Videos
  • Simple push button
  • Control enables the ALPHA2 to be programmed in one of 3-constant speed
  • The current operating mode is always visible on the ALPHA2's LED display
  • The large LED display shows the current energy consumption in Watts and estimated flow in gallons per minute
  • For installation, you have the flexibility to use either our unique ALPHA Plug with line cord or the ALPHA2 with terminal box for conduit connections
  • ALPHA2 is complete with an integrated check-valve, foam insulation jacket and nut captures for flanges
  • Robust startup enables the ALPHA2 to continuously attempt to restart indefinitely in blocked rotor conditions
  • ALPHA2 can be used as a replacement for more than 30 competitor pump models
  • Cast iron flange with terminal box