By Hayward Pool Products



Part # W3EC65A

Warranty 1 Year

Alternate Part #'s HAYW3EC65A

Product Description

Perflex Extended-Cycle D.E. filters clean pools fast, removing particles as small as one micron the first time through. Its patented Flex-Tube™ design gives longer cycles between cleaning because the same D.E. filter powder is used over and over. Plus, Perflex cleans without backwashing, saving hundreds of gallons of treated pool water. An exceptional value as a replacement filter or for new pool installations. For sparkling, clean pools, step up to Perflex.


  • In-ground pools of all types and sizes


  • Exclusive bump handle activates the mechanism causing the Flex-Tubes to instantly and uniformly clean themselves of dirt and filter powder
  • Self-venting design automatically expels any air that may be present in the system
  • Proven, patented Flex-Tube filter elements efficiently reuse the filter powder and dirt mixture forming a fresh filtering surface
  • Combination pressure gauge and threaded inspection/service port is easy to read and remove when filter needs cleaning
  • Heavy-duty filter tank injection-molded of high-strength Duralon™ for dependable, corrosion-free performance
  • Integral check valve prevents system backflow whenever pump is off  

Hayward D.E. Filter Systems

Click here for more Hayward Filters  

Product Specifications

Port Size:
1 1/2 in.
Flow Rating:
67 GPM
Filtration Area:
27 sq. ft.
Turnover 8 Hrs.:
32640 gal.
Turnover 10 Hrs.:
40800 gal.

?     Asked on 8/4/2007by Guest

The manual says that a diverter valve can be installed for vacuuming to waste during heavy spring clean up or pulling rain water out of the pool. Where would it be installed? Do you sell this valve?

A  Answered on 8/4/2007 by InyoPools Product Specialist Patrick P.

Yes we do carry this diverter valve which you may view or purchase through this link http://www.inyopools.com/Products/07501352023400.htm This valve has 3 ports on it, the valve would screw into the disharge side of your pump and you can have the handle turned so the return water goes through your filter or you can turn the valve in the opposite direction so the dirty water goes to waste and bypasses your filter, this is very helpful when vacuuming or for heavy spring clean up.

?     Asked on 5/27/2012by Guest

How DE powder does the EC65 require

A  Answered on 5/27/2012 by InyoPools Product Specialist Patrick P.

The EC65 requires 6 lbs. of DE powder.

?     Asked on 4/19/2013by Guest

Will the EC65A handle a 20,000 gallon swimming pool?

A  Answered on 4/19/2013 by InyoPools Product Specialist Patrick P.

Yes, the Hayward EC65A would be able to handle a 20,000 gallon pool.

?     Asked on 4/20/2013by Guest

How do I add the d.e. powder to the EC65A filter?

A  Answered on 4/20/2013 by InyoPools Product Specialist Patrick P.

D.e. powder should be added to the skimmer closest to the pump and filter.

?     Asked on 5/2/2013by Guest

Can this pool filter be used for above ground pools or is it strictly used for in ground pools?

A  Answered on 5/2/2013 by InyoPools Product Specialist Patrick P.

Yes, you can use an EC75 on an above ground. It would be over sized depending on the size of the pool.


Est. Repair Time

1 to 2 hrs

Tools Needed

Socket Set

6     1

Old and worn out filter fingers

Written on 11/19/2016 by Guest

Replaced filter with new filter same model. . For start=up I am going to use the old filter head to clean up the pool after winter, then install new head for summer swim season. This way all winter water will clean-up through old fingers that still work ok, only fill up a lot faster and require backwashing to much. Now I won't have to filter old winter water through new fingers. Have the old filter for 37 years, 3 1/2 months swimming season, cleaned filter for every winter down time which I feel did a lot for the longevity of the filter bags. This filter is easy to regenerate, not much maintenance, if keeping up on your water chemistry, Hayward makes a good product in my estimation. Since finding Inyo Pools on the internet, I will use them for all future swimming pool products. They are very knowledgeable, provide video for how to things that might come up, prices are good, no having to travel to local pool stores, Order quantities with no shipping charges, Free pool care guides and updates, beats anyone else I've dealt with in last 37 tears of having an in-ground pool. Thanks Lee Behler

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