Pentair Quad D.E. 100
#1 in D.E.Full review
A cartridge-style D.E. filter for a large in-ground pool, for owners who want D.E. clarity without wasting water on backwashes.
Amazon $1,999.99$1,999.99
3.9/5
A grid D.E. filter for an in-ground pool of up to about 57,600 gallons, for owners who want the clearest water and will handle D.E.
- 120 gpmFlow
- 60 sq ftFilter area
- 57,600 galPool size
- In-groundPool type
Check price at Amazon$1,458.99
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
- Curved grids pack 60 sq ft into a 21.5 in. tank
- Continuous internal air relief plus a manual bleed valve
Cons
- Backwash valve sold separately
- D.E. powder to add after every backwash
- One-year parts-only warranty when bought online (EC model)
The Pentair FNS Plus family
Every Pentair FNS Plus model we rank, smallest first. Ratings compare each against its own type.
| Model | Flow | Rating | Price |
|---|---|---|---|
| Pentair FNS Plus 48 | 96 gpm | 3.5/5 | $1,379 |
| Pentair FNS Plus 60 (this one) | 120 gpm | 3.9/5 | $1,458.99 |
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 | EC-180009 |
|---|---|
| Filtering | |
| Filter type | D.E. |
| Filter area | 60 sq ft |
| Maximum flow | 120 gpm |
| Largest pool | 57,600 gal |
| Pool type | In-ground |
| Build | |
| Tank diameter | 21.5 in |
| Maximum pressure | 50 psi |
| Air relief | Yes |
| Warranty | 1 year |
Alternatives in this type
Hayward ProGrid DE6020
#3 in D.E.Full review
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.
Amazon $1,709$1,709
Hayward Perflex EC75A
#4 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 $1,239$1,239
Compare
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