Power-Flo II 1 HP 1-Speed Pump - SP1780 Discontinued Out of Stock - W3SP1780

Part # W3SP1780

By Hayward Pool Products

  4.41 Average  



Part # W3SP1780

Alternate Part #'s HAYW3SP1780

Product Description

Inyo Recommended Pumps

Self-Priming Pump Series

Power-Flo II is a high performance, low maintenance pump series available at an affordable price. For above-ground and in-ground pools requiring self-priming action, Power-Flo II is the pool professional's choice for superior performance and unparalleled quality.


  • Voltage = 115
  • Pipe Size = 1.5"


  • Above-ground, small in-ground pools
  • Water fountains
  • Small marine aquariums
  • Pond circulation


  • Heavy-duty motor with stainless steel motor shaft and automatic thermal overload protector for maintenance-free operation
  • Exclusive corrosion-proof PermaGlass XL™ housing for all-weather performance and quiet operation
  • 100% drip proof, heat-resistant double sized seal for long motor life
  • Unique, integral diffuser ensures rapid priming
  • Massive strainer basket has extra leaf-holding capacity
  • Clear cover lets you see when basket needs cleaning 
  • Drain plug for easy maintenance of pump

Performance Data:  

Pump Output (GPM) vs. Total Resistance To Flow (Feet of Head)
Model Number 10 ft 20 ft 30 ft 40 ft 50 ft
SP1750 55 45 33 15 -----
SP1775 65 57 45 30 8
SP1780 78 69 56 40 15


Miscellaneous Notes
1 Year Warranty On Strainer Housing.
1 Year Warranty On Motor.

Overall Dimensions

Click here for more Hayward Pool Pumps

Product Specifications

1 HP
115 V
Port Size:
1.5 in.

?     Asked on 8/1/2021by David

Does this pump self prime?

A  Answered on 8/2/2021 by InyoPools Product Specialist Stephen B.

Thank you for contacting Inyo Pools, Yes this pump is self priming. 

?     Asked on 10/6/2019by Pradeep Pillai

Please see the attached photos of my previous question/request for the model of pump.


A  Answered on 10/10/2019 by InyoPools Product Specialist Michelle B.

Hello, You have the Max Flo pump. What parts are you looking for?

?     Asked on 10/6/2019by Pradeep Pillai

Hello Inyo Pools Help, I have an in-ground pool of 15,000 gallons with a Hayward Sand filter-Pro Series model S210T, but Pump's exact model can not be identified. Sometimes the pump does not make sufficient pressure because the gauge shows zero psi. When we connect the vacuum hose to the pool outlet, it does not pick up anything from the pool bottom. It appears that the pump is not working properly, so we want to change the pump. Pl suggest model. The existing pump voltage is 240V. Thank you.

A  Answered on 10/15/2019 by InyoPools Product Specialist Michelle B.

Hello,What is the model number of the filter? We would need to make sure not to exceed the max GPMS on the filter. We would also need to know the total dynamic feet of head on the pool. Here is a great article that explains on how to do so, http://www.inyopools.com/Blog/how-do-i-calculate-feet-of-head-for-my-pool/

?     Asked on 5/26/2019by Rob

Will this pump replace my Power-Flo II Pump that I currently have. Model# sp1510z1xec part# 7-184878-22


A  Answered on 5/26/2019 by InyoPools Product Specialist Patrick P.

Hi Rob, Yes this is the direct drop-in replacement for your Hayward Power Flo II pump. 

A  Answered on 5/27/2019 by Product Owner

Is there a union kit I can get for this pump. Looks like when they plumbed it, they didn’t use unions

?     Asked on 7/11/2017by David L

What is the input and output thread sizes? Are these NPT or does it come with special fittings?

A  Answered on 7/12/2017 by InyoPools Product Specialist Patrick P.

Hi David, The input and output ports on this pump are 1.5" female and accept a standard 1.5" male fitting.

?     Asked on 5/24/2017by Inyo Visitor

is this motor have a lift pump in it

A  Answered on 5/27/2017 by InyoPools Product Specialist Stacey M.

Hello, please give us more description on what a "lift pump" would be.

?     Asked on 6/7/2016by Inyo Visitor

Can you move the exit port to the side and not the top?

A  Answered on 6/7/2016 by InyoPools Product Specialist Patrick P.

Yes by unscrewing the screws on the pump you can rotate the discharge port to have side discharge.

?     Asked on 5/30/2016by marnie

I have an above ground pool 24*52 I am looking for a new hayward pump, which one do you recommend?

A  Answered on 6/3/2016 by InyoPools Product Specialist Lennox H.

Hi Marnie, This pump is adequate for a 24'R x 52"H pool.

?     Asked on 6/11/2015by David Adamson

Need a thermal overload for 1 hp Hayward pump , need price

A  Answered on 6/12/2015 by InyoPools Product Specialist Alex V.

David, Unfortunately we do not have a thermal overload for this pump/motor.

?     Asked on 5/9/2015by Charles B. Eaves

what is a good replacement pump for a flotec pool pump AT 251001-01

A  Answered on 5/10/2015 by InyoPools Product Specialist Patrick P.

Hi Charles, I am showing that the flotec pump AT 251001-01 is for an inground pool, if this is the case then I would suggest this 1 HP Inground Pool Pump.

?     Asked on 9/5/2008by Guest

Is the Power-Flo II equipped with a power cord?

A  Answered on 9/5/2008 by InyoPools Product Specialist Patrick P.

No, the power cord is sold separately. Here is a link to the power cord. http://www.inyopools.com/Products/07501352015032.htm


Review Summary

 (Average 4.41  out of 5 stars)
5 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews