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 2.9. The CircuPool SmartFlo AF 3.9P leads on efficiency and warranty. The Pentair IntelliFloXF VSF wins on controls. The CircuPool SmartFlo AF 3.9P costs $124.71 less ($1,875 vs $1,999.71).
Pentair IntelliFloXF VSF
#15 in Large PoolsFull review
Only for large or feature-heavy pools on 2.5 to 3 in plumbing that need more flow than a 3 HP IntelliFlo3 can give.
Amazon $1,999.71$1,999.71
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 5.6, 15% above the ENERGY STAR minimum for its size) and warranty (5-year warranty vs 3-year warranty).
- Choose the Pentair IntelliFloXF VSF for controls (Built-in schedule, works with pentair easytouch, pentair intellitouch, pentair intellicomm vs Built-in wi-fi).
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 | Pentair IntelliFloXF VSF |
|---|---|---|
| Overall rating | 3.6/5 | 2.9/5 |
| Efficiency 35% | 58 WEF 7.3, 39% above the ENERGY STAR minimum for its size | 9 WEF 5.6, 15% above the ENERGY STAR minimum for its size |
| Value 25% | 62 $1,875 for 3.9 HP ($481 per HP) | 59 $2,000 for 4 HP ($506 per HP) |
| Warranty 15% | 100 5-year warranty | 50 3-year warranty |
| Controls 15% | 35 Built-in wi-fi | 65 Built-in schedule, works with pentair easytouch, pentair intellitouch, pentair intellicomm |
| Noise 10% | 50 noise not published (neutral score used) | 50 noise not published (neutral score used) |
Specifications
| CircuPool SmartFlo AF 3.9P | Pentair IntelliFloXF VSF | |
|---|---|---|
| Efficiency ratings | ||
| Pump type | In-ground (self-priming) | In-ground (self-priming) |
| Motor | Variable speed | Variable speed |
| Rated horsepower (DOE) | 3.9 HP | 4 HP |
| Hydraulic horsepower (DOE) | 1.8 HP | 2.1 HP |
| Weighted energy factor (WEF) | 7.3 kgal/kWh | 5.6 kgal/kWh |
| ENERGY STAR minimum for its size | 5.2 kgal/kWh | 4.9 kgal/kWh |
| ENERGY STAR certified | Yes | No |
| Pump | ||
| Voltage | - | 230 V |
| Speed range | - | 450 to 3,450 rpm |
| Maximum flow | - | 220 gpm |
| Pipe size | 2 in | 2.5 in |
| Size (W × D × H) | 23.8 × 10.9 × 12.8 in | 24.9 × 11.7 × 14.1 in |
| Controls | ||
| Built-in schedule | - | Yes |
| Freeze protection | No | Yes |
| Wi-Fi | Built in | No |
| Automation compatibility | - | Pentair EasyTouch, Pentair IntelliTouch, Pentair IntelliComm |
| Warranty and models | ||
| Warranty | 5 years | 3 years |
| Warranty terms | 5-year manufacturer warranty with US-based support, as listed for any buyer. | Pentair lists the IntelliFlo VSF and IntelliFloXF VSF at 3 years, parts and labor when professionally installed from a dealer, pool builder or service company. Bought online it is 1 year, parts only. |
| Also sold as | LINGXIAO Relaax390-VS, Key Lander SWP390-VS, LX SWP390-VS, Iliving ILG8PP390-VS, Aqua Expert VSP39-Pro | Sta-Rite IntelliProXF VSF (023056) |
| Released | 2026-04 | - |