Hayward Perflex EC50AC
#7 in D.E.Full review
An extended-cycle D.E. filter for an above-ground or small in-ground pool, for owners who want D.E. clarity without a backwash valve.
Amazon $729$729
3.0/5
A vertical-grid D.E. filter for an in-ground pool owner who wants the clearest water and will add D.E. after each backwash.
- 72 gpmFlow
- 36 sq ftFilter area
- In-groundPool type
Check price at Amazon$1,389
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- D.E. filters the finest of any filter type, for the clearest water
- Grid pack lifts out in one piece for cleaning
- Quarter-turn manual air relief valve
Cons
- Valve sold separately
- Each backwash needs 4.5 lb of fresh D.E. powder
- One-year parts-only warranty on the online (W3) version
The Hayward ProGrid family
Every Hayward ProGrid model we rank, smallest first. Ratings compare each against its own type.
| Model | Flow | Rating | Price |
|---|---|---|---|
| Hayward ProGrid DE3620 (this one) | 72 gpm | 3.0/5 | $1,389 |
| Hayward ProGrid DE4820 | 96 gpm | 3.4/5 | $1,559 |
| Hayward ProGrid DE6020 | 120 gpm | 3.8/5 | $1,709 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | W3DE3620 |
|---|---|
| Filtering | |
| Filter type | D.E. |
| Filter area | 36 sq ft |
| Maximum flow | 72 gpm |
| Pool type | In-ground |
| Build | |
| Maximum pressure | 50 psi |
| Ports | 2 in |
| Air relief | Yes |
| Warranty | 1 year |
Alternatives in this type
Hayward Perflex EC65A
#8 in D.E.Full review
An extended-cycle D.E. filter for an in-ground pool, for owners who want D.E. clarity and long runs between cleanings.
Amazon $1,149$1,149
Hayward Perflex EC40AC
#10 in D.E.Full review
An extended-cycle D.E. filter for an above-ground or small in-ground pool, for owners who want D.E. clarity without a backwash valve.
Amazon $569$569
Compare
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