Pentair Clean & Clear Plus 420
#1 in CartridgeFull review
A large four-cartridge filter for a big in-ground pool, for owners who want to clean the filter a few times a season and never backwash.
Amazon $1,295$1,295
The Pentair Clean & Clear Plus 420 is the better pool filter overall, rated 4.0 to 3.9. The Pentair Clean & Clear Plus 420 leads on value. The Pentair Clean & Clear Plus 520 wins on filter area. The Pentair Clean & Clear Plus 420 costs $493.99 less ($1,295 vs $1,788.99).
Pentair Clean & Clear Plus 520
#2 in CartridgeFull review
A large four-cartridge filter for a big in-ground pool, for owners who want to clean the filter a few times a season and never backwash.
Amazon $1,788.99$1,788.99
Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Pentair Clean & Clear Plus 420 for value ($8.63 per gpm ($1,295, 150 gpm) vs $11.93 per gpm ($1,788.99, 150 gpm)).
- Choose the Pentair Clean & Clear Plus 520 for filter area (520 sq ft of filter area vs 420 sq ft of filter area).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every cartridge pool filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Pentair Clean & Clear Plus 420 | Pentair Clean & Clear Plus 520 |
|---|---|---|
| Overall rating | 4.0/5 | 3.9/5 |
| Value 35% | 61 $8.63 per gpm ($1,295, 150 gpm) | 37 $11.93 per gpm ($1,788.99, 150 gpm) |
| Filter area 30% | 80 420 sq ft of filter area | 100 520 sq ft of filter area |
| Valve 10% | 100 no backwash valve needed | 100 no backwash valve needed |
| Pressure rating 10% | 100 50 psi maximum working pressure | 100 50 psi maximum working pressure |
| Warranty 15% | 33 1-year warranty | 33 1-year warranty |
Specifications
| Pentair Clean & Clear Plus 420 | Pentair Clean & Clear Plus 520 | |
|---|---|---|
| Filtering | ||
| Filter type | Cartridge | Cartridge |
| Filter area | 420 sq ft | 520 sq ft |
| Maximum flow | 150 gpm | 150 gpm |
| Pool type | In-ground | In-ground |
| Build | ||
| Valve | None needed | None needed |
| Maximum pressure | 50 psi | 50 psi |
| Ports | 2 in | 2 in |
| Air relief | Yes | Yes |
| Warranty | 1 year | 1 year |