Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top viewPentair WhisperFlo VS / VST 2.6 THP Variable Speed Pool Pump, 115/208-230V, EC-011533 In stock$1,79900
Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top view
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Pentair WhisperFlo VS / VST 2.6 THP Variable Speed Pool Pump, 115/208-230V, EC-011533

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Quick overview

  • Variable speed program any speed from 450 to 3,450 RPM and run low for circulation, high for cleaning or water features.
  • 2.6 total horsepower more power than the SuperFlo VST for larger pools and longer plumbing runs.
  • Drop-in for WhisperFlo same footprint and plumbing as the single speed WhisperFlo it replaces.
  • Either voltage wires to 115V or 208-230V.
  • TEFC permanent magnet motor totally enclosed, fan cooled, and up to 90% more efficient than an induction motor.
  • Energy Star certified meets the EPA efficiency standard, and often qualifies for utility rebates.
Full description and specifications ↓

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Product details

The Pentair WhisperFlo VST, which Pentair's guide covers with the WhisperFlo VS, is the variable speed version of the WhisperFlo, the pump that has been on inground pads for decades. Model EC-011533 carries a 2.6 total horsepower permanent magnet motor, wires to 115V or 208-230V, and is a drop-in for an existing WhisperFlo, so a single speed pump can come out and this one can go in on the same unions.

Why variable speed

The motor runs anywhere from 450 to 3,450 RPM. Daily circulation and filtration can happen at low speed, where a pump draws a small fraction of its full-speed power, with higher speeds reserved for vacuuming, backwashing, heating or driving water features. The permanent magnet motor is up to 90% more efficient than a conventional induction motor, and the pump is Energy Star certified, which is the usual condition for utility rebates.

Built for the pad

The motor is totally enclosed and fan cooled (TEFC), which keeps rain, insects and debris out of the windings. The housing is corrosion resistant thermoplastic, and the large strainer basket holds more debris between cleanings. Running at lower speeds also makes the pump much quieter than a single speed unit, a point in its favor near a bedroom window or a neighbor.

Sizing

At 2.6 THP this pump sits above the SuperFlo VST. It is the right choice for larger pools, pool and spa combinations, and pads with long plumbing runs or in-floor cleaning systems. It works with most automation systems, or can be programmed from its own control panel.

From Pool School

What Size Pool Pump Do I Need?Enter the gallons, the turnover and the suction pipe. Get the flow and what the pipe carries. Read How Long Should I Run My Pool Pump?Hours from the turnover, why a variable speed pump runs longer and slower, and each manufacturer's schedule. Read How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read

Parts for this pump

Pentair's parts lists give it the pump end parts of the WF-8. Its motor can differ.

Pentair WhisperFlo Pump parts diagram28 numbered parts, with the ones for the WF-8 already picked.Open the diagram

Bought most for this pump

Specifications
Brand Pentair
Manufacturer part number EC-011533
Model WhisperFlo VST
UPC 788379888817
Dealer part number 011533, the number Pentair sells the WhisperFlo VST under through dealers
Type Variable speed pool pump, self priming
Speed Variable, 450 to 3,450 RPM; three programmable speeds plus Quick Clean
Total horsepower 2.6 THP
Service factor 1.0
Weighted energy factor (WEF) 8.4, by Pentair and DOE's certification record
Voltage 115 or 208 to 230 V, 50 or 60 Hz, with no special wiring or switching
Phase Single phase
Full load amps 13.9 A at 115 V, 11.1 to 10.1 A at 208 to 230 V
Port size 2 in x 2 in NPT
Flow at 50 ft of head About 127 GPM at 3,450 RPM on 230 V, read from the performance curve in Pentair's guide
Motor Permanent magnet, totally enclosed fan cooled (TEFC), 56 square flange
Certifications UL, NSF/ANSI 50, ENERGY STAR, by Pentair
Sized for Pools that would take up to a 2 HP pump, by Pentair
Dimensions 12.8 in high at the motor, by Pentair's drawing, which gives no overall length
Weight 45 lb, by Pentair
Warranty 1 year, parts only, by Pentair for e-commerce (EC) models and online purchases
Housing Corrosion resistant thermoplastic
Replaces Existing Pentair WhisperFlo pumps, drop-in
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Is EC-011533 the WhisperFlo VS or the WhisperFlo VST?
Pentair's own page for EC-011533 names it the WhisperFlo VST Variable Speed Pool Pump, at 2.6 total horsepower and a weighted energy factor of 8.4. Pentair's installation guide covers the WhisperFlo VS and the WhisperFlo VST together, so both names appear in its documents.
Will the WhisperFlo VST run on 115 volts?
Yes. Pentair rates it for single phase power from 115 to 230 V, at 50 or 60 Hz, with no special wiring or switching. It draws 13.9 full load amps at 115 V and 11.1 to 10.1 A at 208 to 230 V. Full speed moves less water on 115 V than on 230 V, by Pentair's curve.
Will the WhisperFlo VST fit where my old WhisperFlo was?
Pentair says it drops in where an existing Pentair WhisperFlo was, with 2 inch by 2 inch NPT ports and 2 inch plumbing. Its drawing puts it at 12.8 inches high at the motor end. Check the circuit too: it runs on 115 V or 208 to 230 V, single phase.
How long is Pentair's warranty on the WhisperFlo VST EC-011533?
One year, parts only, from the date of purchase. That is Pentair's warranty for its e-commerce (EC) models and for products bought online, with no labor coverage. Pentair's standard terms, which add labor, are for equipment bought from a pool store, builder or service company and professionally installed.
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