Pentair Sand Dollar SD40
#12 in SandFull review
An affordable top-mount sand filter for a pool of up to about 19,200 gallons. It suits buyers who want a simple multiport filter from a major maker.
Amazon $512$512
The Pentair Sand Dollar SD40 and the Hayward ProSeries S166T are evenly matched, rated 2.7 and 2.7. The Pentair Sand Dollar SD40 leads on value and filter area. The Hayward ProSeries S166T costs $83 less ($429 vs $512).
Hayward ProSeries S166T
#13 in SandFull review
A simple multiport sand filter for an above-ground pool of up to about 14,400 gallons. Buy it for cheap media and one-lever backwashing, not for the clearest water.
Amazon $429$429
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.
Which should you buy?
- Choose the Pentair Sand Dollar SD40 for value ($12.80 per gpm ($512, 40 gpm) vs $14.30 per gpm ($429, 30 gpm)) and filter area (1.8 sq ft of filter area vs 1.4 sq ft of filter area).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every sand pool filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Pentair Sand Dollar SD40 | Hayward ProSeries S166T |
|---|---|---|
| Overall rating | 2.7/5 | 2.7/5 |
| Value 35% | 37 $12.80 per gpm ($512, 40 gpm) | 28 $14.30 per gpm ($429, 30 gpm) |
| Filter area 30% | 9 1.8 sq ft of filter area | 0 1.4 sq ft of filter area |
| Valve 10% | 100 multiport valve | 100 multiport valve |
| Pressure rating 10% | 50 pressure rating not published (neutral score used) | 100 50 psi maximum working pressure |
| Warranty 15% | 33 1-year warranty | 33 1-year warranty |
Specifications
| Pentair Sand Dollar SD40 | Hayward ProSeries S166T | |
|---|---|---|
| Filtering | ||
| Filter type | Sand | Sand |
| Filter area | 1.8 sq ft | 1.4 sq ft |
| Maximum flow | 40 gpm | 30 gpm |
| Largest pool | 19,200 gal | 14,400 gal |
| Pool type | In-ground | Above-ground |
| Sand | 150 lb | 100 lb |
| Build | ||
| Tank diameter | 19.5 in | - |
| Valve | Multiport | Multiport |
| Maximum pressure | - | 50 psi |
| Ports | 1.5 in | 1.5 in |
| Air relief | Yes | - |
| Warranty | 1 year | 1 year |