By Pentair Pool Products



Part # 011518

Warranty 1 Year (See Pentair Warranty Card)

Manufacturer Code WFE-26

Alternate Part #'s PEN011518

Product Description

Inyo Recommended Pumps

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

Pentair Whisperflo Pump Curve
Click here for more Pentair Pumps

Product Specifications

1 1/2 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 4/14/2012by Guest

Pumps my 1-1/2hp pool pump (Centurion CF11 N1 1A) went out when I fired it up (12 years old) Looking at maybe upgrading to energy efficient pump... considering Pentair or maybe Sta-Rite. Your Pentair WFE-26 (547.99) and WFE-6 (515.99) seem very similar but they are described as "up-rate" (26) and "full-rate" (6). What is difference and do you think these are similar to my current pump. (24700 gal pool; 230/115 pump we are wired for 230)Other or better suggestions? Last year I picked up a used sa

A  Answered on 4/14/2012 by InyoPools Product Specialist Patrick P.

Based on your pool size you need a Gallon per minute rating (GPM) of 52 GPM's to turn your pool over in an 8 hour time period, I show that your current Challenger pump outputs roughly 60 GPM's and we show that the part # you provided for your current pump is for a 1 HP. The sand filter you have has a GPM rating or 62 GPM's where the large Sta Rite filter has a GPM rating of 110 GPM's. The uprated WFE-26 pump outputs a GPM of 80 and the Full Rate WFE-6 pump has a GPM of 100. With all of this being said I would suggest going with the WFE-26 if you are going to stay with your current set up and swap out to the Sta Rite filter as the current sand filter can only handle 62 GPM's if you do intend on adding water features or see the need for the increased GPM's in the near future then I would go with the WFE-6 and swapping out to the S8M150. Lastly note that the amp draw is less on the WFE-26 so your operational cost would be roughly 20% less then that of the WFE-6. You may view or p

?     Asked on 5/11/2016by Scott

I am replacing the 1-1/2 h.p. motor on my Pentair pool pump which crosses over to an A.O. Smith B2841 or B2841V1 motor i beleive. What is the tune up kit p/n that i will need for the following pump? Whisperflo pump p/n: 011518 A tune up kit includes the shaft seal assembly, and a few Orings/seals, is this correct ? Thank You ! Scott

A  Answered on 5/11/2016 by InyoPools Product Specialist Hector F.

The gokit32 would be your seal kit if you have a chlorine pool and gokit32salt if you have a salt pool. They do come with the shaft seals, other o rings and gaskets.

?     Asked on 7/15/2019by Jason

I want to upgrade my pool pump from sta-rite MPRA6D to pentair wfe-26. I don't know is it good idea and my Hayward Sand Filter S244T with SP0714T1 can handle high GPM. All PVC pipes are 2 inch. I need suggestions.

A  Answered on 7/15/2019 by InyoPools Product Specialist Lennox H.

Hi, Jason. Using the WF-26 pump isn't a good idea with an S244T filter. Before replacing the pump, try to calculate the Total Dynamic Head (TDH) of your pool. This will allow you to properly size a pool pump. 

?     Asked on 4/4/2020by Gary

I have old this WFE-26 pump right now and need to replace it. I am told that we should not install a single speed motor pump in California any longer. What would be equivalent variable speed models to consider? I plan to install it myself so I kind like a "drop-in" idea - without much re-pipe or space reconfiguration.. Thanks. -Gary

A  Answered on 4/9/2020 by InyoPools Product Specialist Patrick P.

Hi Gary, Yes if you are in California then you do have to go with a variable speed. I would suggest just replacing your motor with this 1.65 HP Variable Speed Replacement Motor and this Whisperflo Tune Up Kit this would mean no re-plumbing at all. The variable-speed motor will save you a ton on your operational cost.

  • Commented on 4/11/2020 by Product Owner

    Thanks Patrick for your response. This motor's frame is 48Y and my WFE-26 is 56Y. Also I see this one has 4 screws where mine has 6 screws to attach to the pump. Would you double check that this motor will fit into the WFE-26 pump? Thanks again -Gary

    • Commented on 4/14/2020 by InyoPools Product Specialist Patrick P.

      Hi Gary, Yes the 48Y motor works as a replacement for the 56Y. The 56Y has a slightly larger barrel diameter than the 48Y however the 48Y comes with a rubber spacer which ensures there is no gap between the bottom of your motor and your motor cradle. We sell a ton of the 48Y variable speed motors which are being used to replace 56Y motors.


Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Nut Drivers, Saw, channel locks

1     0

Not pumping effectively, would not engage the flow sensor

Written on 6/5/2019 by Guest

Inyo tech support was very helpful. Pentair Whisperflow pump does not include wiring instructions. What I thought what was a connection lug cover is actually a rotation switch from 230V to 115V. Turning off the breaker and switching it to 115 the pump worked perfectly. Unknowingly when I ordered, the whisperflow pump is 2 inches taller than my previous pentair super-flow. After an hour of re-plumbing the inlet pipes, the installation only took 15-20 min.

Were these instructions helpful? 


Review Summary

 (Average 5  out of 5 stars)
2 Rating
5 star:
4 star:
3 star:
2 star:
1 star: