By Pentair Pool Products



Part # 011580

Warranty 1 Year (See Pentair Warranty Card)

Manufacturer Code WF-4

Alternate Part #'s 011580, WF-4, PEN011580

Product Description

Inyo Recommended Pumps 

Pentair 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.

Commonly Replaced Parts (Click on Link to view/purchase):

 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.

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Pentair Whisperflo DimensionsPentair Whisperflo Pump Curve
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Product Specifications

1 HP
Port Size:
2 in.
Service Factor:

?     Asked on 2/16/2012by 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?

A  Answered on 2/16/2012 by InyoPools 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.

?     Asked on 5/4/2015by Bernie

What is the difference between WFE-4 & WF-4

A  Answered on 5/4/2015 by InyoPools Product Specialist Andy O.

Bernie- The difference between the WFE-4 and the WF-4 is the WFE-4 is the energy efficient model so the Amps it runs at is 14.8 (115v)/7.8-7.4 (230v) and the WF-4 runs at 16.0(115v)/8.0(230v).

?     Asked on 5/9/2015by Doug Roberts

I'm considering the Pentair WF4 #11580 pump with 1 hp motor to replace my old unit. Does this motor have a 56Y frame? (I want to be able to keep my old pump as a spare).

A  Answered on 5/10/2015 by InyoPools Product Specialist Joe S.

Yes the current model pump has a 56Y framed motor

?     Asked on 5/31/2018by Sue

Does this pump have a switch to go between filter and backwash?

A  Answered on 5/31/2018 by InyoPools Product Specialist Hector F.

No this is just a pump. It sounds like you are looking for a multiport or slide valve for the filter. Those are relevant to the filter model.  

?     Asked on 3/30/2020by William Hays

Is the seal in this pump compatible with salt water systems?

A  Answered on 3/30/2020 by InyoPools Product Specialist Patrick P.

Hi William, Yes the seal in this pump compatible is with salt water systems.


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