'/%3E%3C/svg%3E)
Hover image to zoom
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
' fill='%23F15C02' d='M49 0C21.938 0 0 21.938 0 49s21.938 49 49 49 49-21.938 49-49S76.062 0 49 0m0 82.709a7.54 7.54 0 1 1 0-15.08 7.54 7.54 0 0 1 0 15.08m7.54-28.412a7.541 7.541 0 0 1-15.08 0V22.831a7.54 7.54 0 0 1 15.08 0v31.466z'/%3E%3C/svg%3E)
59896877 has been discontinued
Discontinued September 22, 2017
This product was discontinued by the manufacturer.
MANUALS (3)
Direct Replacement:
ALPHA 15-58F Smart ECM High Efficiency Circulator Pump with Optimized Setpoint Control
 --%3E %3Csvg version='1.1' id='Half' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cg%3E %3Cpath fill='%23F15C02' d='M30.05,70.23l3.79-12.01L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1h1.58 L93.71,7.18c-3.58-3.82-8.66-6.23-14.28-6.23H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,5.41,2.22,10.32,5.79,13.88 L30.05,70.23z'/%3E %3C/g%3E %3Cpath fill='%23FBC8B4' d='M93.71,7.18L60.98,39.6H91.2L65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82l5.55-17.59L6.75,93.32 c3.55,3.54,8.44,5.73,13.82,5.73h58.87c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,15.4,97.01,10.69,93.71,7.18z'/%3E %3C/svg%3E){kind=small}
Product Highlights
–
115V
Flanged x Flanged Connection
21 MAX GPM
150 MAX PSI
Cast Iron
0.65 Amps
Description
–
NOTE: Image depicts ALPHA-15-55F/LC model
Grundfos is proud to introduce the next generation of energy efficient circulators - the Grundfos ALPHA. By incorporating a permanent magnet motor design, power consumption is now reduced by 50%. The Grundfos ALPHA adapts to the variable demands of the system without sacrificing comfort. Using the AUTOADAPT feature, the Grundfos ALPHA will analyze the system and adjust to meet your heating demands.
Features:
Grundfos is proud to introduce the next generation of energy efficient circulators - the Grundfos ALPHA. By incorporating a permanent magnet motor design, power consumption is now reduced by 50%. The Grundfos ALPHA adapts to the variable demands of the system without sacrificing comfort. Using the AUTOADAPT feature, the Grundfos ALPHA will analyze the system and adjust to meet your heating demands.
Features:
- AUTOADAPT measures system changes automatically and maximizes energy savings
- Easy-to-use operation
- Select a mode with the touch of a button
- Easy-to-read LED display shows flow indication and power consumption
- Simple plug connections
- No wiring required
- Terminal box for conduit connection applications
Specs
–
| Material: | Cast Iron |
|---|---|
| Application: | Heating |
| Max Flow (GPM): | 21 |
| Flow Range (GPM): | 0-21 |
| Head Range (ft.): | 0-19 |
| Max Head (Ft): | 19 |
| Type: | Var. Speed Pump |
| Max Pressure (PSI): | 150 |
| Phase: | 1 |
| Voltage: | 115V |
| Amperage: | 0.65 |
| Hertz: | 60 |
| Temperature Range (F): | 36°F - 230°F |
| Connection Type: | Flanged x Flanged |
| Connection Size: | 3/4", 1", 1-1/4", 1-1/2" |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Compare Similar Products
Brand
Material
Application
Max Flow (GPM)
Flow Range (GPM)
Head Range (ft.)
CURRENT ITEM
Cast Iron
Heating
21
0-21
0-19
Product Reviews
4.94 out of 16 reviews
100% would recommend this product
5 star
94%
4 star
6%
3 star
0%
2 star
0%
1 star
0%
Customer Images
Showing 1-10 of 16 reviews
Great pump
This is a variable displacement pump and what was attractive to me is that the energy consumption drops with a decrease in pump output. My heating system has four zone valves so when only one zone is open, the pump adjusts appropriately. It is also well designed.
Fred
CT.
9 years ago
Verified Buyer
Was this review helpful to you?
cast iron circulator pump
these pumps are just great
skinner13
chazy new york
10 years ago
Verified Buyer
Was this review helpful to you?
Its worth it!
It is worth every penny -
Super Quiet, energy efficient, no 2nd guessing did i set the pump at the right speed for my setup it does all the math all on its own and as things change a zone valve opens or close it will adjust as it goes...
Mikey
Randolph NJ
10 years ago
Verified Buyer
Was this review helpful to you?
Radiant heat lifeblood
Newly installed and still learning the operation of the pump settings but I can already tell this is a quality pump Excellent and fast shipping
trproffitt
Bowling Green Ky
10 years ago
Verified Buyer
Was this review helpful to you?
Great, quiet pump
These are great pumps. I'm using 2 of them as circulators for a hydronic geothermal heating system. They are almost completely silent even at top speed and the efficiency is amazing. The gpm readout is extremely useful, although I'm not sure how accurate it is, as I have two in series, and one always reads 8 gpm, the other 9 or 10 gpm.
Larry
Central Virginia
11 years ago
Was this review helpful to you?
Just what I was looking for
Used this pump for my shop in floor heating works great and very quiet
Tim
Ohio
11 years ago
Verified Buyer
Was this review helpful to you?
Great pump
I purchased this pump as a replacement. The 'auto' feature is fabulous. The pump is absolutely silent and does not over pump.
SupplyHouse.com had a great price and fast delivery. I recommend them to anyone.
Steve the plumber
IGH, Minnesota
11 years ago
Verified Buyer
Was this review helpful to you?
I just purchased my sixth one
I have an off grid home and business. I have replaced 6 Taco 007's with these pumps. The digital readout and adjustments allow me to balance my flows and monitor electrical consumption. The total power draw of these 6 pumps at my settings is within a few watts of one of the Taco pumps. My longest run (from the boiler to the house) is 200 feet (1&1/4" pipe) and that zone which has three of these as zone pumps is satisfied by the middle setting and only uses 40 watts.
Sawdust Dan
Fairlee, VT
11 years ago
Verified Buyer
Was this review helpful to you?
 --%3E %3Csvg version='1.1' id='With-RB' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23FBC8B4' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Great pump, horrible packaging
Only negative, is the poor packaging the manufacture chooses to use.
Heavey pump packaged with a small plastic check valve that both tumble around an oversized un-dampened box.
Plumber Dave
P'ville NY
12 years ago
Verified Buyer
Was this review helpful to you?
Very nice circ pump
Replaced a "green" pump that just wasn't doing the job. This Grundfos was super easy to install. Nice European-style touches (like not having to futz with wire nuts). This pump is quiet. Maintains proper temperature differential.
Rich the angry Jets fan
Central Illinois
12 years ago
Verified Buyer
Was this review helpful to you?
Product Q&A
7 Questions7 Questions
Q: Will this pump work as a replacement to the Primary Loop Pump that comes pre-installed on a Buderus GB142 manifold? Also would it be ok to run in the AUTOADAPT mode being that its on the manifold for the GB142? I already have an Alpha pump for my zones which works great -
Asked by Mikey1 10 years ago
Add your answer
Verified Reply- SupplyHouse StaffIt seems that the Buderus GB142 series comes with the Grundfos 15-58 3-speed circulator. The best way to compare is to determe what friction loss there is through the system, including the Buderus manifold, and what flow rate is needed for the system. If that fits onto the pump curve for the Alpha 15-55, then it will work. In general, the Alpha and its Auto Adapt feature work well on hydronic heating systems, as long as it meets the system requirements.
Was this review helpful to you?
Q: Does it make sense to run this pump in the boiler loop (primary loop) of an injection piping system? For what I know about this pump, it will run on maximum power in the following scenario: when secondary loop doesn't consume anything and the pump is only circulating hot water through the boiler.
Asked by welder 10 years ago
Add your answer
Verified Reply- SupplyHouse StaffDepending on what mode it is set on, the pump will slow down to meet the lower demand. The pressure drop through the system will be lower than when the secondary loop is open and so the speed will be reduced unless the pump is in constant speed mode.
Was this review helpful to you?
- Sov
No, it does not make sense in a fixed speed application. Due to initial higher cost.
Was this review helpful to you?
Q: Is the motor/impeller/display assembly (The part held on with 4-Allen screws) available separately? That way there is no need to mess around with flanges, etc.
Asked by adolfo 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffUnfortunately the manufacturer does not offer replacement parts for this pump, so the entire pump would need to be replaced.
Was this review helpful to you?
Q: Does this pump feature an integral check valve?
Asked by Pexy and I know it 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffThis pump ships with a check valve that can be installed if so desired. The guide to install the check valve is included in the installation instructions provided.
Was this review helpful to you?
Q: Will this pump mate up to Taco 007 flanges?
Asked by pumper 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffYes it would be compatible with the standard flanges used on the 00 series Taco pumps.
Was this review helpful to you?
Q: Will This Bolt Into Existing Ups15-58Fc Flanges?
Asked by joe 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffYes, it will.
Was this review helpful to you?
Q: Will this pump be equivalent to a TACO 009-F5?
Asked by Ridgekid 14 years ago
Add your answer
Verified Reply- PexSupply StaffNot really: the Taco 009 has higher head pressure capabilities, but lower flow ratings. You need a circulator that can handle both the flow rate and head pressure of your system.
Was this review helpful to you?