Alpha2 15-55SF Variable Speed Stainless Steel Circulator Pump w/ IFC, 1/16 HP, 115V


Brand: Grundfos

Mfr Part#: 99163937

Model: Alpha2 15-55SF

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$299.95 / each & Free Shipping
x2 $579.90 & Free Shipping
(2 x $289.95 / each)
  • Description
  • Literature
  • Reviews (1)
  • FAQs (2)

Alpha2 15-55SF model is a stainless stee variable speed circulator with AutoADAPT feature, designed for use in a variety of heating, plumbing and cooling applications. It is certified lead-free, approved for potable water applications and meets NSF61 & 372 standards.
Note: this model replaces older Alpha model 59896879.


  • New and improved version of Grundfos bestselling Alpha circulator;
  • AutoADAPT feature allows the circulator to adapt to changes in the hydronci system to maximize energy savings;
  • Push button allows to select between AutoADAPT, constant speed (3 settings - Hi/Med/Low) or contant pressure (3 settings) modes;
  • Large LED display;
  • Built-in check valve;
  • Insulation jacket and (2) gaskets (O-rings) included;
  • Permanent magnet motor technology with robust startup enables pump to restart indefinitely when rotor is blocked;
  • Stainless steel body for closed or open-loop heating and potable applications;
  • Standard flange accepts Grundfos GF15/26 and other brand flanges;
  • Hardwire model;
  • Certified lead-free;
  • Made in the USA.

Technical Specifications:

  • Voltage: 115V;
  • Amperage: 0.65A;
  • Hertz: 60;
  • Phase: 1;
  • Watts: 5 - 45W (depending on mode selected);
  • Wiring: Hardwired;
  • Temperature Range: 36°F - 230°F;
  • Max Pressure: 150 psi;
  • Flow range: 0 - 21 GPM;
  • Head Range: 0 - 19 ft of head;
  • Material: Stainless Steel;
  • Application: Plumbing or Heating.


1 year from the date of installation
Alpha2 15-55SF Variable Speed Stainless Steel Circulator Pump w/ IFC, 1/16 HP, 115V has an average 5.0 out of 5 rating based on 1 user review.
By Verified Buyer on 1/30/2016
These pumps are very well buil... Better than the taco pumps I previously was using
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Is this stainless steel pump housing compatible with potable water? I thought I saw where the stainless steel manifolds were not.
Read 1 answer
All Grundfos stainless steel and bronze circulators we carry are approved for potable water use.
Answered on 12/31/2015 by PexUniverse Customer Service
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Does the integrated check valve (optional) come with the circulator? If not, what is the part number?
Read 1 answer
The check valve is included in box with the pump, but not installed.
Answered on 6/22/2015 by PexUniverse Customer Service
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