Hayward ProSeries S310T2
#1 in SandFull review
A low-priced top-mount sand filter for an in-ground pool of up to about 47,040 gallons. It suits owners who want easy backwashing over the finest filtering.
Amazon $1,219$1,219
The Hayward ProSeries S310T2 rates 3.9 among sand pool filters; the Pentair FNS Plus 48 rates 3.5 among D.E. ones. The Hayward ProSeries S310T2 costs $160 less ($1,219 vs $1,379).
Pentair FNS Plus 48
#5 in D.E.Full review
A grid D.E. filter for an in-ground pool of up to about 46,080 gallons, for owners who want the clearest water and will handle D.E.
Amazon $1,379$1,379
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (sand and D.E.), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Hayward ProSeries S310T2 | Pentair FNS Plus 48 |
|---|---|---|
| Overall rating | 3.9/5 | 3.5/5 |
| Value 35% | 39 $12.44 per gpm ($1,219, 98 gpm) | 61 $14.36 per gpm ($1,379, 96 gpm) |
| Filter area 30% | 97 4.9 sq ft of filter area | 54 48 sq ft of filter area |
| Valve 10% | 100 multiport valve | 50 valve type not published (neutral score used) |
| 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
| Hayward ProSeries S310T2 | Pentair FNS Plus 48 | |
|---|---|---|
| Filtering | ||
| Filter type | Sand | D.E. |
| Filter area | 4.9 sq ft | 48 sq ft |
| Maximum flow | 98 gpm | 96 gpm |
| Largest pool | 47,040 gal | 46,080 gal |
| Pool type | In-ground | In-ground |
| Sand | 500 lb | - |
| Build | ||
| Tank diameter | - | 21.5 in |
| Valve | Multiport | - |
| Maximum pressure | 50 psi | 50 psi |
| Ports | 2 in | - |
| Air relief | - | Yes |
| Warranty | 1 year | 1 year |