By Hayward Pool Products



Model # W3EC50AC

Warranty 1 Year

Dimensions 18x16x33 32 LBS

Alternate Part #'s HAYW3EC50AC

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:
50 GPM
Filtration Area:
25 sq. ft.
Turnover 8 Hrs.:
24000 gal.
Turnover 10 Hrs.:
30000 gal.

?     Asked on 4/29/2021by Jonathan

I have an old regenx rg70093sft. Filters are no longer available. My pool is 18’ and 54” high. Would this model work as a replacement?

A  Answered on 4/29/2021 by InyoPools Product Specialist Patrick P.

Hi Jonathan, Yes this would be a suitable replacement for the Hayward RG70 Regenx filter and would be the filter we suggest. The plumbing ports are not in the exact location as your old filter, if you are using hoses then no big deal. If you do have hard plumbing to your pump and filter then you will have a little re-plumbing but nothing major. We do have this filter in stock ready to ship.

?     Asked on 4/3/2020by Donna

Hi, i have a Hayward E 65 filter, want do you recommend for a replacement?

A  Answered on 11/12/2020 by InyoPools Product Specialist Megan C.

The Perflex DE Filter 27 sqft - EC65A - W3EC65A will be the most simple replacement. If would like to move away from DE, the ProClean Plus 125 sqft Pool Cartridge Filter - PCCF-125 is a great choice.

?     Asked on 4/22/2019by Michael J Hyzy

I have a model# EC-45 with a bad tank, which filter is a exact replacement?


A  Answered on 4/22/2019 by InyoPools Product Specialist Lennox H.

Hi, Michael. This is the new style complete filter which has a clamp style body you have the old style filter so you use p/n ECX10344P

?     Asked on 7/2/2018by Inyo Visitor

What all is included with the EC50AC? Any hoses, valves, adapters, etc.?

A  Answered on 7/2/2018 by InyoPools Product Specialist Lennox H.

Hi. This is just the filter assembly with the nest inside. No valve, hoses or adapters are included. 

?     Asked on 6/19/2018by rick

I have a 24 year old hayward 50 DE filter. The filters are no longer working at an acceptable level. Can I get replacement filters to install?

A  Answered on 6/19/2018 by InyoPools Product Specialist Lennox H.

Hi, Rick. The replacement Nest Assembly - ECX1036 (EC50A), ECX1037 (EC50AC) or replace the entire filter. 

?     Asked on 5/29/2018by Dan

Hi- I currently own a two speed 1.5 hp pump (Speck model E71-III) but the filter it was paired with needs to be replaced. I am considering the EC50AC and my pool is a 24 foot round above ground. I would like to use the low speed setting on the pump for energy efficiency but the flow rate will be less than 50 GPM. Will this filter type still be effective at rates below 50 GPM? Thank you for the help!

A  Answered on 5/30/2018 by InyoPools Product Specialist Lennox H.

Hi, Dan. A flow rate lower than 50 GPM is fine, the flow rate just cannot exceed the 50 GPM.  

?     Asked on 1/1/2018by Inyo Visitor

I have a Purex D.E. filter model SM 2036 on my Jacuzzi. It has flow rate of 72 gpm and a 50 psi max pressure. It is worn out and needs to be replaced. What would you recommend?

A  Answered on 1/4/2018 by InyoPools Product Specialist Lennox H.

Hi. Based on your current filter model and style, I'd recommend the Perflex - EC75A or the Earthworks - EW36. The 4000 Series - SMBW4048 is an upgrade option that will provide you with a higher effective filtration and flow rate. 

?     Asked on 9/13/2017by John

What are the dimensions of EC50AC DE filter as I can not find then and it goes under a deck

A  Answered on 9/14/2017 by InyoPools Product Specialist Lennox H.

Hi, John. The EC50AC filter dimensions are 31-3/8" H x 13-1/2" W. An additional 10" of top clearance is required to operate the filter. 

?     Asked on 9/6/2017by Inyo Visitor

How do i know which DE filter to buy? Pool is 16'x32'. 4'deep shallow end is 8' long with a sloping trunk to a depth of 10'.

A  Answered on 9/8/2017 by InyoPools Product Specialist Lennox H.

Hi. Filters are sized based on the flow rate of the pump. You can follow the steps in our How To Size a Pool Filter guide. 

?     Asked on 6/20/2017by Martha

Is this filter for unground pools?

A  Answered on 6/20/2017 by InyoPools Product Specialist Hector F.

Yes, this filter is good for in-ground pools.

?     Asked on 10/17/2016by Luther

what is the difference between this and model No. EC50C?

A  Answered on 10/18/2016 by InyoPools Product Specialist Andy O.

Hello Luther- The difference would be the EC50AC is just the filter while the EC50C is the filter that comes in a combo with the pump. If you are looking for just the filter the EC50AC would be what you want.

?     Asked on 6/23/2016by Inyo Visitor

After we turn the system off, bump the pump and turn it back on...DE sprays out of the jets. Does this mean that we have broken one of the plates at the top of the filter?

A  Answered on 6/23/2016 by InyoPools Product Specialist Alan M.

It is possible that one of the plates are broken OR one or more fingers have broken and that is what is allowing the DE powder to re-enter the pool.

?     Asked on 6/9/2016by mike

What would cause the pump to blow algae back into the pool after it has been shut off for a while and then turned back on?

A  Answered on 6/18/2016 by InyoPools Product Specialist Alex V.

Mike, I would recommend inspecting the large gasket, d.e. fingers and the gaskets on the bump shaft assembly.

?     Asked on 5/22/2016by Inyo Visitor

we need the diaphragm or gasket that holds pressure in filter when you bump it

A  Answered on 5/28/2016 by InyoPools Product Specialist Alex V.

Hello, You can find the diaphragm gasket for the EC50AC here: http://www.inyopools.com/Products/07501352018080.htm

?     Asked on 6/15/2015by Inyo Visitor

If my pump is pushing 75 GPM, would the es50ac be able to handle it?

A  Answered on 6/15/2015 by InyoPools Product Specialist Brian M.

AN EC50AC has a maximum suggest gallon per minute flow rating of 50. For that size pump, I would suggest an EC75A wich is rated at 80GPM.

?     Asked on 5/13/2015by Roberto

Do you recommend this filter for 1Hp. Motor, 18,000 gallons in ground pool. Replacing my old Hayward DE gilter.

A  Answered on 5/13/2015 by InyoPools Product Specialist Andy O.

Roberto- I would not recommend this filter for your pool. Your pump is, more than likely, too strong for you to use the Perflex DE Filter EC50AC. I would recommend the EC75A. It has a higher flow rating (100 gpm).

?     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.


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