By Pentair Pool Products



Part # 011774

Warranty 1 Year (See Pentair Warranty Card)

Manufacturer Code WF-28

Alternate Part #'s 11774, 58140, PEN011774, PUR-10-382

Product Description

Inyo Recommended Pumps

The design that unleashed a new era in whisper-quiet operation

WHISPERFLO pump incorporates innovative hydraulic engineering to move water more efficiently and quietly than competitive pumps. Under typical operating conditions, WHISPERFLO pump 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, WHISPERFLO pump

WHISPERFLO pump is engineered to provide optimum performance in a complete range of installations, including pool/spa combinations. It operates suction-side, pressure-side, and in-floor cleaning systems, and is compatible with pressure or vacuum systems, sand filters, diatomaceous earth filters, and cartridge filters.

 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 Dimensions

Pentair Whisperflo Pump Curve
Click here for more Pentair Pumps

Product Specifications

2 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 3/11/2016by Shawn

Does this pump come with the motor also? I currently own this model but it's making lots of noise. Trying to decide if I want to attempt to rebuild the pump and replace the motor or buy a new unit.

A  Answered on 3/11/2016 by InyoPools Product Specialist Andy O.

Hello Shawn, The 011774 Whisperflo Pump 2 HP is a complete pump, which means it comes with the motor and strainer housing.

?     Asked on 5/31/2016by Al

Does the Whisperflo 2HP pump include the 1.5 and 2 inch slip unions? Thankyou

A  Answered on 6/5/2016 by InyoPools Product Specialist Lennox H.

Hi Al, The Whisperflo pump does not come with unions, you will have to purchase them separately p/n 11201-0154. The unions can be used with 1-1/2" or 2" pipes.

?     Asked on 1/30/2017by Randy

What does full rate pump refer to verses this pump

A  Answered on 1/30/2017 by InyoPools Product Specialist Stacey M.

Hello Randy, From the specs of the 011774 that is a 1.5hp full rate, even though it says 2hp, because a 1.5hp single speed has the Total Horsepower of 2.25hp. So this is a full rate pump.

?     Asked on 7/12/2017by Peter

What type of fitting is required and what is the thread style on a Pentair Whisperflo Model WFE-28 2 HP pump inlet pipe? Thank you

A  Answered on 7/13/2017 by InyoPools Product Specialist Patrick P.

You will need two of these 2" Male Threaded x 2" Slip Unions the ports on this pump are 2" female and these unions will thread into the the female port.


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 (Average 4.75  out of 5 stars)
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