By Hayward Pool Products



Part # W3DE3620

Warranty 1 Year Warranty

Alternate Part #'s HAYW3DE3620

Product Description

Inyo Recommended Filters

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.
Pool Type:
In Ground
Filter Type:

?     Asked on 5/2/2013by 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 InyoPools Product Specialist 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

?     Asked on 10/8/2013by Guest

How do I backwash my Hayward Vertical Grid DE filter?

A  Answered on 10/8/2013 by InyoPools Product Specialist 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 9/15/2014by Guest

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

A  Answered on 9/15/2014 by InyoPools Product Specialist 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 6/17/2015by 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 InyoPools Product Specialist 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 5/5/2016by 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 InyoPools Product Specialist 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).


Est. Repair Time

Less than 1 hr

Tools Needed

Pliers, Socket Set

1     0

my old filter had a crack in it

Written on 6/14/2017 by Guest

so I ordered a new one and it came in a timely manner, and you send me a step by step how to and it went smooth as silk

Were these instructions helpful? 


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