CircuPool SmartFlo AF 3.9P
#2 in Large PoolsFull review
A high-flow smart pump for big pools with water features on a Pentair-footprint pad; most pools need less.
Amazon $1,875$1,875
The CircuPool SmartFlo AF 3.9P is the better pool pump overall, rated 3.6 to 2.8. The CircuPool SmartFlo AF 3.9P leads on efficiency and warranty. The Speck BADU Pro-VI VS 3.45 HP costs $126.17 less ($1,748.83 vs $1,875).
Speck BADU Pro-VI VS 3.45 HP
#17 in Large PoolsFull review
Only for large pools with heavy feature loads that need over 200 gpm; smaller pools run cheaper on the Pro-V.
Amazon $1,748.83$1,748.83
Prices were last checked October 27, 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 CircuPool SmartFlo AF 3.9P for efficiency (WEF 7.3, 39% above the ENERGY STAR minimum for its size vs WEF 6.8, 22% above the ENERGY STAR minimum for its size) and warranty (5-year warranty vs 2-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large pools pool pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | CircuPool SmartFlo AF 3.9P | Speck BADU Pro-VI VS 3.45 HP |
|---|---|---|
| Overall rating | 3.6/5 | 2.8/5 |
| Efficiency 35% | 58 WEF 7.3, 39% above the ENERGY STAR minimum for its size | 24 WEF 6.8, 22% above the ENERGY STAR minimum for its size |
| Value 25% | 62 $1,875 for 3.9 HP ($481 per HP) | 59 $1,749 for 3.5 HP ($507 per HP) |
| Warranty 15% | 100 5-year warranty | 25 2-year warranty |
| Controls 15% | 35 Built-in wi-fi | 30 Built-in schedule |
| Noise 10% | 50 noise not published (neutral score used) | 50 noise not published (neutral score used) |
Specifications
| CircuPool SmartFlo AF 3.9P | Speck BADU Pro-VI VS 3.45 HP | |
|---|---|---|
| Efficiency ratings | ||
| Pump type | In-ground (self-priming) | In-ground (self-priming) |
| Motor | Variable speed | Variable speed |
| Rated horsepower (DOE) | 3.9 HP | 3.5 HP |
| Hydraulic horsepower (DOE) | 1.8 HP | 1.6 HP |
| Weighted energy factor (WEF) | 7.3 kgal/kWh | 6.8 kgal/kWh |
| ENERGY STAR minimum for its size | 5.2 kgal/kWh | 5.6 kgal/kWh |
| ENERGY STAR certified | Yes | No |
| Pump | ||
| Voltage | - | 230 V |
| Speed range | - | 600 to 3,450 rpm |
| Maximum flow | - | 213 gpm |
| Pipe size | 2 in | 2 in |
| Size (W × D × H) | 23.8 × 10.9 × 12.8 in | - |
| Controls | ||
| Built-in schedule | - | Yes |
| Freeze protection | No | Yes |
| Wi-Fi | Built in | No |
| Warranty and models | ||
| Warranty | 5 years | 2 years |
| Warranty terms | 5-year manufacturer warranty with US-based support, as listed for any buyer. | Speck limited warranty: 2 years from purchase (no more than 3 years from factory shipment), repair, replace or refund, no labor; it is conditional on installation by a qualified pool professional and a licensed electrician, so a DIY install voids it. |
| Also sold as | LINGXIAO Relaax390-VS, Key Lander SWP390-VS, LX SWP390-VS, Iliving ILG8PP390-VS, Aqua Expert VSP39-Pro | - |
| Released | 2026-04 | - |