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Control GPM - Not RPM
CircuPool SmartFlo Adaptive Flow™ Pump | 3.9 THP | Target Flow Control
Next-generation Wi-Fi Enabled Adaptive Flow™ Pumps. Includes 1.5" and 2" Unions. Dual Voltage (110V/220V). Fits Pentair IntelliFlo* / Pentair SuperFlo*

CircuPool SmartFlo Adaptive Flow™ Pump | 3.9 THP | Target Flow Control

Part Number: UAF3.9P-1100-5A
Availability: In Stock.
Estimated Delivery Times
$1,875.00
Save:$276.00(15%)
$1,599.00
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Extra $250 Coupon Available - See Details

Control Flow — Not Just Speed

Set the flow your pool needs. SmartFlo AF pumps automatically adjust motor speed to maintain it. Smarter circulation. Zero RPM guesswork.

  • Target Flow Control: set gallons-per-minute (GPM), not RPM.
  • Self-Optimizing: adapts automatically as conditions change.
  • Consistent Filtration: reliable circulation day after day.
Power 3.9 THP
Warranty 5 Year Limited
Adaptive + Target Flow Control
WiFi + App Control
Uses up to 85% Less Power!
Energy Star 3.1 Certified
Qualifies For Rebates

Your Pool Cares About Flow, Not Speed TM

It's possible that many pools with variable-speed pumps are not set right - getting insufficient flow, or worse, potentially wasting energy instead of saving it! SmartFlo Adaptive Flow™ changes that.

Instead of programming speeds, you program the flow your pool actually needs. SmartFlo monitors system performance and automatically adjusts motor speed to maintain your selected flow rate - even when conditions change (for example, as your filter gets dirty).


What That Means for Your Pool

  • Get intentional pool circulation, only moving the price amount of water necessary every day.
  • Better filtration performance with stable circulation rates ideal for your pool filter's media type.
  • Eliminate wasted energy from unnecessary high-speed operation.
  • Eliminate insufficient flow from operation inadvertantly at too low of speeds.
  • Confidence + achievable energy savings. No worrying if the pump is set right. Ensure maximized operational efficiency.

Bottom line: you set the target flow—the pump does the optimizing automatically to achieve your goal.


CircuPool SmartFlo AF Features:

SmartFlo Adaptive Flow™ Pumps are the next generation of variable speed pool pumps. Get achievable energy savings* of up to 85% (up $850 - $1800 annually) thanks to the combination of its industry-leading flow control technology and its energy efficient variable frequency drive / inverter-controlled, totally-enclosed fan-cooled motor design. Its high performance, customizable operation, and heavy-duty construction make it a perfect fit for virtually any type of pool. Works great with salt chlorinators, heat pumps, and other flow-dependent pool equipment!

  • Target Flow Control - Provides optimal, intentional water flow (without the guesswork).
  • Adaptive Operation - Provides consistent results, even under changing conditions.
  • Wi-Fi Enabled App - Get simple setup, remote control, and need-to-know notifications.
  • Quiet Operation - Get a peaceful pool environment free of pool equipment noise.
  • Qualifies For Rebates - Certified for: Energy Star 3.1, DOE, CEC, UL, CUL.
  • Compatible Plumbing - Helps eliminate replumbing when replacing a number of popular models. Fits plumbing for:
    • Pentair WhisperFlo**
    • Pentair IntelliFlo**
  • Self-Priming - NSF 50 Priming tested. Adjustable priming speed/flow and duration.
  • Premium Controls - Backlit LED screen. Simple controls with intuitive user interface.
  • Freeze Protection - Get circulation when air temperatures start to drop (adjustable parameters).
  • Precise Alerts - Get actionable notifications if issues arise, including run-dry alerts.

CircuPool products are backed by USA-Based Expert Support & USA-Based Factory Warranty


Adaptive Flow™ vs. Standard Variable-Speed Pumps

Not all variable-speed pumps are the same. See how SmartFlo Adaptive Flow™ compares.

Feature SmartFlo Adaptive Flow™ Standard VS Pump
Set Target Flow (GPM) Yes No
Automatic Speed Adjustment Maintains selected flow automatically Fixed RPM unless manually reprogrammed
RPM Guesswork Required None Yes
Consistent Filtration Performance Stable flow despite system changes ? Can vary as filters load or conditions change
Energy Optimization Maximized with optimal flow ? Depends on correct manual programming
Adapts to Dirty Filters / Solar / Heater Use Yes No automatic compensation

*Energy savings depend on pool configuration and operating conditions.


Resources


*Savings based on Energy Star savings calculator with 220THP variable-speed pump compared to a 1.5HP single-speed pump running US average run times and energy costs on a 20,000 gallon pool as of 2026. Individual Weighted Energy Factor (WEF) scores and savings may vary by model. Actual savings may vary based on local utility rates, pool size, pump run time, pump horsepower, pump RPM, plumbing size and length, pump model, service factor and/or other local or hydraulic factors.

**CircuPool products are not made by, or affiliated with Pentair PLC; Pentair®, WhisperFlo®, IntelliFlo®, and all other third-party brands, models, products and company names are trademarks of their respective holders and do not imply license. Use of them does not imply any affiliation, endorsement, authorization, or approval. The use of manufacturer names, product names, part numbers, or such trademarks herein are included for fitment & are referenced for informational purposes only.

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Specs

Pump Type:

Adaptive Flow™ Variable-Speed

Motor Type:

Variable Frequency Drive / Inverter-Controlled, Totally-Enclosed Fan-Cooled Motor

Power:

3.9 THP

WEF (Weighted Energy Factor):

7.3 (kgal/kWh)

Maximum Flow Rate (Unrestricted):

Up to 172 GPM

Motor Speed Range:

450 - 3450 RPM

Max Head, Zero Flow (Hmax):

88 ft TDH

Energy Star Certified::

Yes, 3.1

Voltage:

230 VAC

Amperage:

13 A

Plumbing Type:

New installations - Includes 2" unionized fittings. 

Plumbing Compatibility:

Retrofit installations - Fits placement of ports for existing Pentair WhisperFlo / Pentair IntelliFlo. 

CEC Certified:

Yes

UL Certified:

Yes

Weather / UV-Resistance:

IP55-rated. Designed for Outdoor Installation and Operation

Warranty:

5 Years* (5 Years Wet End / 2 Year Motor)

Warranty Penalty for Self-Install:

No

Features

  • Target Flow Control -  Set the flow rates desired as you program it to run throughout the day. (No guessing at what motor RPM speeds to program)
  • Adaptive Operation - When the pump runs any programmed flow rate, the pump continually makes internal adjustments to maintain performance despite changing conditions (examples: as pool filter gets dirty, when other pool equipment engages, etc...).
  • App Control - Get easy setup, remote control and notifications via the Wi-Fi enabled mobile app. Get precise alerts in real-time if issues occur, including run-dry alerts.
  • Compatible Plumbing - Allows for easy retrofit installation without the need to replumb when replacing popular 3rd party pumps such as Pentair WhisperFlo® & Pentair IntelliFlo®.
  • ENERGY STAR® 3.1 Certified -  Qualifies for rebates - Meets strict energy efficiency criteria set by the U.S. Department of Energy. CEC Certified. UL Certified.
  • Quiet Operation - Whisper-quiet motor and reduced hydraulic noise for a peaceful pool environment.
  • Integrated Freeze Protection - Pump automatically begins running at low temperatures to help reduce the chance of freezing. Adjustable parameters (temperature and running speed/flow).
  • Quick Clean Mode - Customizable independent programming to use on-demand when performing cleaning that requires the pump to run. Adjustable parameters (running speed/flow and duration).
  • Programmable Scheduling - Use mobile app or onboard controls - program time of day schedule (auto) or configure 3 different manual settings + Quick Clean.
  • Backlit LED screen and touch keypad. Simple to use controls.
  • Self-Priming for quick, easy start-up. NSF 50 Priming tested. Adjustable priming speed/flow and duration.
  • Threaded union fittings for simple replacement or maintenance. Includes 2" fittings.
  • See-through pump lid allows easy inspection of strainer basket - simple to remove, no tools required. Easy cleaning and maintenance.
  • IP55-rated enclosure for reliable outdoor operation. UV and weather-safe.
  • Keypad Lockout mode to secure controls access.
  • Diagnostic alarm display & retention.
  • Onboard programming retention for power outages.
  • Certified safe for use in saltwater pools.
Manufacturer 5 Year Limited Warranty for residential use - 5 Year Pump Body / 2 Year Motor. All warranties offered are provided by the relative manufacturer and are limited to the terms and proration they provide. See manufacturer's documentation for a full description of warranty terms and conditions.

Typical pump sizing would be for pools ranging from: 15,000 - 60,000 gallons. Designed for elevated hydraulic loads. Maintains maximum flow in feature-rich and high-head systems.

Please consult a professional to ensure proper pump sizing. A pump's capacity should ensure 1-2 circulation "turnovers" of the water in the pool through the filter each day, with one turnover typically achieved within 8 hours. Pools with water features & pressure-dependent equipment may require greater pump capacity. Properly sized variable-speed pumps typically have more total horsepower than the corresponding single-speed pump.

Our Technical Support and Sales teams are happy to assist (866-766-5243). Be sure to check out our In-Depth Pool Pump Sizing Guide

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