Whisperflo Pump 2 HP - WF-28



Part # 011774

By Pentair Pool Products

  4.75 Average  



Part # 011774

Warranty 1 Year (See Pentair Warranty Card)

Manufacturer Code WF-28

Product Description

PureLine Prime Pump

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 6/4/2019 by John Taggart

What is most cost efficient pool pump to operate? (electricity usage)

A  Answered on 6/7/2019 by InyoPools Product Specialist Patrick P.

Hi John, We would suggest the PureLine Variable Speed Pumps as the most energy efficient pumps.

?     Asked on 5/25/2019 by USCanuck

Motor on WF-28 burned out after 4 years in service. What can I use to replace the 2hp 3350014S? Is there a suggested Pentair replacement (355026S etc.)?

A  Answered on 5/25/2019 by InyoPools Product Specialist Patrick P.

Here is a link to the Pentair 355026S Replacement Motor you can also use a PureLine PL2859 HP Motor which is considerably less $$ and is the same motor with the exception of the color. You will also need a Pentair Whisper Flo Seal Kit when you replace your motor. We put together this Video on How to Replace a Pool Pump Motor which you may find helpful when you tackle this project.

?     Asked on 5/8/2019 by John Bargerhuff

How quickly can I get this pump?

A  Answered on 5/8/2019 by InyoPools Product Specialist Joe S.

Good day, ground shipping normally takes 3-5 days. At check out you can select if you want it 3 day, 2 day, or Next Day Air.

?     Asked on 1/4/2019 by Clint

Is there a wf-28 equivalent Penrair pump that comes without the motor? I just replaced my motor and when I turned it on the older pump is now leaking so I want to purchase and replace the pump only.

A  Answered on 1/7/2019 by InyoPools Product Specialist Hector F.

The closest that we carry is part number 5074-10B which contains the pump housing, lid, basket, seal plate, and shaft seal. 

?     Asked on 8/18/2018 by Gary

I have a WF 28 and it is about 10 years old. I had to replace the motor once already, about 5-6 years ago and now that replacement is quite loud. It is still running though. Should I replace just the motor again, or should I consider replacing the whole pump?

A  Answered on 8/20/2018 by InyoPools Product Specialist Lennox H.

Hi, Gary. You're at the mark where replacing the entire pump is recommended. However, replacing the motor B859 and seals - GOKIT32 or GOKIT32SALT will get your pump up and running again. 

?     Asked on 6/24/2018 by Doug

I am considering going from a 1.5 wf-26 to a 2 wf-28 would help me with the pros / cons Thank You

A  Answered on 6/27/2018 by InyoPools Product Specialist Hector F.

We would recommend staying with what the pool builder had placed on there as far as total horsepower, unless you plan on adding water features, moving the equipment further away from the pool or adding solar heating. If you do decide that you would like to go up in horsepower a wise choice would be by going with a replacement variable speed motor or complete pool pump. Maybe look into a Pureline Prime PL2606 pool pump. 

?     Asked on 6/19/2018 by charles callison

how manny gph does a 2 hp pump make

A  Answered on 6/19/2018 by InyoPools Product Specialist Hector F.

The manufacturer provides a chart for calculating gallons per minute, so after calculating that based on your feet of head, you can then calculate the per hour rating. If you click here you can view the GPM chart for the Whisperflo series in the product details. 

?     Asked on 5/31/2018 by David Brown

I am just trying to verify that this pump (the WF-28) can be wired for 115V.

A  Answered on 5/31/2018 by InyoPools Product Specialist Lennox H.

Hi, David. Yes, this pump can be wired for 115 volts. 

?     Asked on 7/12/2017 by 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.

?     Asked on 1/30/2017 by 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 5/31/2016 by 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 3/11/2016 by 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 2/16/2012 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?

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.


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