Pentair Whisperflo Standard Full Rate 1/2 HP Pump


MANUFACTURERPentair Pool Products

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Product Description

Pentari WHISPERFLO incorporates innovative hydraulic engineering to move water more efficiently and quietly than competitive pumps. Under typical operating conditions, Pentair WHISPERFLO offers the greatest water flow of any high performance pump—yet with the lowest electrical consumption. To circulate more water in less time and at the lowest cost, choose quiet, reliable, Pentair WHISPERFLO.

 Additional features include:

  • Lower operating costs. Less horsepower required to produce needed water flow, even when used in pool/spa combinations and when operating in-floor cleaning systems.
  • Extremely quiet operation documented in rigorous ETL tests.
  • Patented oversized strainer basket reduces cleaning frequency.
  • 1 Year Warranty
  • High-efficiency impeller maximizes water flow.
  • Life-extending diffuser wear-ring prevents uneven impeller wear.
  • Thicker seal plate withstands loss of prime conditions.
  • Available in standard and energy-efficient models.


  • Pipe Size = 2"

Pentair Whisperflo DimensionsPentair Whisperflo Pump Curve
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Product No. Model Voltage HP Service Factor Full Load Amps WT.
011578 WF-2 115/230V 1/2 1.95 10.5/5.4 41
011579 WF-3 115/230V 3/4 1.65 14.2/7.1 41
0115580 WF-4 115/230V 1 1.65 16.0/8.0 46
011581 WF-6 115/230V 1.5 1.5 22.4/11.2 54
011582 WF-8 230V 2 1.30 11.5 55
011583 WF-12 208-230V 3 1.15 15.0-13.6 56
1/2 HP

Whisperflo Brochure (374.88 KB)

Recommended wire gauge for motors (111.76 KB)

Whisperflo Brochure (388.24 KB)

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Ask a Question

Asked on 02/16/2012 by Guest

I just finished replacing the shaft seal on my booster pump. As soon as I turned the pump on water was leaking from the shaft seal. Is it defective or am I doing something wrong?

Answered on 02/16/2012 by Product Specialist Patrick P.

Depending on the model, the installation of a booster pump shaft seal can be slightly different than a pool pump shaft seal. Some booster pump and pool pump shaft seals require that a silicone sealant be used on the outer areas of the metal seat of the shaft seal. The seal will need to be lightly hammered into the body of the pump. You can use a 1 inch PVC coupling or a piece of 1 1/4 inch PVC pipe and a rubber mallet. This procedure will apply to any pool pump or booster pump using a >PS-1000 style shaft seal.

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