Hayward Pro Grid DE Filter 36 Sq Ft w/o Valve - DE3620



Part # DE3620

By Hayward Pool Products

  5 Average  



Part # DE3620

Warranty 1 Year Warranty

Product Description

Hayward Pro-Grid vertical grid D.E. filters provide superior water clarity, efficient flow and large cleaning capacity for pools and spas of all types and sizes. Constructed with high-strength reinforced thermoplastic, Pro-Grid combines high-technology features and "service-ease" design for an unparalleled filtration value for both new pool and aftermarket installations.

In addition, the Hayward Pro-Grid filter delivers low maintenance and dependable operation.


  • Reinforced thermoplastic filter tanks constructed from durable glass reinforced copolymer to meet the demands of the toughest applications and environmental conditions, including in-floor cleaning systems
  • Self-Aligned tank top and bottom make access to servicing the grid elements fast and simple
  • Heavy-duty, tamper-proof one-piece flange clamp securely fastens tank top and bottom, allowing for quick access to all internal components without disturbing piping or connections
  • High impact grid elements designed for up-flow filtration and top-down backwashing for maximum efficiency
  • Integral lift handles and uniform low-profile base make removal of grid nest fast and simple
  • Inlet diffuser elbow distributes flow of unfiltered water evenly to all filter elements and provides even distribution of D.E. to grids
  • 72 ft filter made of reinforced thermoplastic allows for both commercial and large residential applications and years of non-corrosive, trouble-free performance
  • New High capacity, rapid release manual air relief valve bleeds air with a quick quarter turn of the lever

Click here for more Hayward Filters

Product Specifications

Multiport Valve:
DE Required:
4.5 lbs.
Flow Rating:
72 GPM
Filtration Area:
36 sq. ft.
Turnover 8 Hrs.:
34560 gal.
Turnover 10 Hrs.:
43200 gal.

?     Asked on 5/18/2017 by Ray

I currently have a Hayward pro grid DE3620 filter. I am looking to purchase a new energy efficient pump. I have an in ground 20,000 gal pool. the old pump is a hayward single speed 1 1/2 hp gold series I believe. What would be my best option for a new pump. The piping is 1 1/2".

A     Answered on 5/18/2017 by Patrick P.

Hi Ray I would suggest the PL2605 1.65 HP PureLine Prime Variable Speed Pump as a great energy efficient pump that could be used with this filter.

?     Asked on 2/17/2017 by Dave

My Hayward D E 3600 (25 years old) has a crack in the dome squirting water. Can I replace it with t h e Hayward 3620 and will the fittings fit my piping or should I try a different model?

A     Answered on 2/17/2017 by Scott W.

Yes, the fittings will be the same.

?     Asked on 10/11/2016 by Jeff

I have a 10x20 igp with 17 year old Hayward DE4800 filter and 1.5hp super pump. I go the whole season without having the clean or backwash the filter. I'm looking to replace the filter and was considering the DE3620, is this the right one to get, and is the 1.5hp pump too much power for this filter or can I use it? I was considering rebuilding the the motor or is a new one a better choice?

A     Answered on 10/12/2016 by Megan C.

Hi, Jeff. I best recommend replacing it with the same/new Hayward Pro Grid DE Filter 48 Sq Ft w/o Valve - DE4820. The Hayward Super Pump 1 1/2 HP Single Speed - SP2610X15ump has maximum output of 83 gallons per minute. Depending on the location of the equipment to the Total Resistance to Flow, you may exceed the design flow rate of the Hayward Pro Grid DE Filter 36 Sq Ft w/o Valve - DE3620 at 72GPM. Please review our How to Size a Pool Pump for Your In-Ground Pool first. 

?     Asked on 8/5/2016 by Russ Mattison

I have a 15 X 30 X 5 ft. inground pool with attached spa. I am running an old Waterway Crystal Water DE filter with a Pentair WFE-8 pump (2 in piping and a multiport valve). I replaced all the broken filter grids this spring and now I am again spewing DE into the pool. I think I need to replace the filter as it may be too small for the pump. I cannot read any of the markings on the filter (they all faded) What size filter should I have with this pump?

A     Answered on 8/16/2016 by Lennox H.

Hi Russ, The filter that you currently have is too small to be used with the WFE-8 pump. You will then need to determine the flow rate by calculating the "Feet of Head" of your pool in order to properly size a filter. That will be the determining factor on what size filter you need.

?     Asked on 7/10/2016 by

what size de filter do i need fora 19000gal pool with a 3/4hpee motor

A     Answered on 7/11/2016 by Matt S.

For a pump and pool that size, The Hayward Pro-Grid DE3620 will work fine, but you can use any of the filter sizes above that like the DE4820, DE6020, or DE7220. The larger the filter, the longer you can go between cleanings and maintenance. If you want a thorough guide on how to size a pool filter read/watch this guide: Inground Pool Equipment Selection Part 2: Filters

?     Asked on 7/6/2016 by

can I backwash a de4820 filter? if so how cant find outlet

A     Answered on 7/10/2016 by Lennox H.

Hi, You can backwash a DE4820 filter using a slide or multiport valve. The "waste" port is located on the valve.

?     Asked on 6/19/2016 by Paul

What would the replacement filter be for an old Hayward De2400 thanks.

A     Answered on 6/19/2016 by Matt S.

The replacement filter for the Hayward Micro-Clear DE2400 is the Hayward Pro-Grid DE2420.

?     Asked on 5/11/2016 by John

Is their an advanage by going to a higher volume filter? i.e. my filter should be a DE3620. If I go to a DE4820 will there be any type of advanage?

A     Answered on 5/11/2016 by Hector F.

Yes, the advantage would be that the larger filter likely would not need to be cleaned as often and could handle extra water pressure if the motor is ever up sized.

?     Asked on 5/5/2016 by Brandon

Hayward Pro Grid DE Filter 36 Sq Ft w/o Valve - which valve can I purchase to use with this filter. Multiport valve or glide valve?

A     Answered on 5/6/2016 by Andy O.

Brandon- With the DE3620 Hayward Pro Grid DE Filter 36 Sq Ft w/o Valve you have a couple options as far as valves, if you want the multiport valve you can use the Vari-Flo Valve 1 1/2" for DE or Vari-Flo Valve 2" for DE and if you want to use a slide valve you can use Valve Ass'y, Slide -2" Skt Wg (sp0410x502s).

?     Asked on 6/17/2015 by doug

I have this model filter for a 20,000gal in ground pool. What is the minimum size pool pump hp I should use when relacing the pump?

A     Answered on 6/17/2015 by Brian M.

This filter is designed to handle a flow rate of  72 gallons per minute. Not all 1hp pumps have the same flow rate. It varies depending on design. The minimum would be a 3/4hp, but no more than a 1hp.

?     Asked on 9/15/2014 by Guest

How much D.E. does this Hayward de3620 filter use?

A     Answered on 9/15/2014 by Patrick P.

This model filter uses approximately 6 lbs. of D.E. when completely empty and approximately 3lbs. of D.E. after backwashing.

?     Asked on 10/8/2013 by Guest

How do I backwash my Hayward Vertical Grid DE filter?

A     Answered on 10/8/2013 by Patrick P.

When the filter pressure rises 8-10 PSI over the clean starting pressure, the filter must be backwashed. Turn off the pool pump. Rotate the multiport valve to backwash position or slide the slide valve up. When the pump is turned on, the dirty DE and water will flow out to waste. Once the water runs clear, turn off the pump. With a slide valve, push the handle down and start the pump. Once the pump is primed, add the required DE. If using a multiport valve, rotate the handle to rinse. Turn on the pump and let water flow for 20-30 seconds, cleaning out the plumbing lines. Turn off the pump and rotate the valve back to filter. Turn on the pump and once primed add required DE.

?     Asked on 5/2/2013 by Guest

Do you carry replacement grids for the Hayward DE3620 filter? If so, are they made by Hayward?

A     Answered on 5/2/2013 by Patrick P.

Hayward doesn't make the grids for their filters. The grids are usually made by a different manufacturer. We do carry replacement grids here: http://www.inyopools.com/cartridges_unicel.aspx


Review Summary

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

The Most Helpful Review

34     0

 (5 out of 5 stars)  DE pool filter par excellence

from Winter Springs, FL ()

I recently purchased a Hayward DE-3620 filter as a replacement for a 10-yr old Hayward DE-3600, and was initially most satisfied with the ability to directly install the new unit in place of the old one without having to make any adjustments whatsoever to the interface connections with the existing vari-flow valve and external piping. Upon first use, I found welcome improvements had been made to the ease of operating the air relief valve and to the pressure gage with a simple means for indicating changes in pressure from the initial setting and when filter cleaning is required. Having just encountered a particularly heavy accumulation of oak pollen and blosom debris that indicated a need to manually clean the filter elements (rather than the more usual backwash routine) I was most impressed with Hayward's changes to the design of the clamp ring and the relative ease and speed with which the top shell and the internal filter elements could be removed. I am pleased to see that Hayward has continued to improve their already great DE filter product line.

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The Most Recent Reviews

 (5 out of 5 stars)  Perfect replacement

from Smithtown, ny ()

Pros: Fully compatible Hayward has a great track record for reliabilty

Cons: None

Replaced same size Hayward de filter which was more than 20 years old. Parts were becoming obsolete. I didn't know how much longer I could take it apart and get it back together. The new filter fit perfectly with the existing multi port valve. Can't wait for next season.

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 (5 out of 5 stars)  Excellent Filter

from Orlando, Fl ()

Replacing one of the same with a new filter after 20 years. The old one just finally gave out after spending all that time in the Florida sun.

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1     0

 (5 out of 5 stars)  hayward filter

from new york ()

Pros: fast free delivery

Great product. I hooked it up easily and runs beautifully.

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2     0

 (5 out of 5 stars)  Perfect Cleaner

from Saylorsburg, PA ()

Eficient Cleaner. Uses less DE than the filter it replaced. The Automatic Air Bleeder Valve is a plus! American Made

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3     0

 (5 out of 5 stars)  Good Price -- Great Product

from El Paso, TX ()

I shopped around on the internet and the price was the best and ordering easy and delivery was timely. I ordered on a Monday morning and the de filter and valve arrived on Friday afternoon. I was also impressed with the improvements to the Hayward de filter. Installation was a breeze!!

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2     0

 (5 out of 5 stars)  Pool filter replacement

from Dallas, TX ()

Our pool professional recommended this brand to replace our 30 year old DE filter which is no longer manufactured. It was installed 2 days ago and is working well. We also purchased the multiport valve to go with it. Very fast delivery! Ordered on a Thurs. and delivered on the next Tues. Very happy with the price and and the service.

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2     0

 (5 out of 5 stars)  best pool filter yet

from Titusville, FL ()

Pros: much more thorough

I replaced a 2-yr old Pentair cartridge style pool filter with the Hayward DE style. Within 24 hrs my water was sparkling, something never achieved with the Pentair (which is why I replaced it after just 2 yrs). I can already tell that I won't need nearly as much chemicals or babysitting of the system to maintain a really clean pool. What a great product!

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