PUMP WHISPERFLO VST 2.6 THP
Product Overview
The direct drop-in variable speed upgrade engineered to replace single-speed WhisperFlo pumps without replumbing.
Pentair's WhisperFlo VST (011533) delivers a 2.6 THP variable speed drive with dual-voltage 115V/208-230V auto-sensing power conversion. Built on the classic WhisperFlo wet-end footprint, it fits directly into existing equipment pads while providing significant energy reduction compared to standard single-speed induction motors. In our experience, this is the standard specification for replacing aging WhisperFlo units without repiping the system.
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Benefits & What Makes It Different
Direct Drop-In Wet-End Alignment
Matches existing Pentair WhisperFlo suction and discharge port heights, eliminating pipe cutting during equipment changeouts.
Auto-Sensing Dual Voltage
Operates seamlessly on either 115V or 208-230V electrical circuits without requiring manual wiring jumper adjustments.
2.6 THP Variable Speed Drive
Features programmable speed settings and scheduling on an onboard keypad to reliably handle filtration, sanitation, and cleaner demands.
Compatibility
- Direct drop-in replacement for existing Pentair WhisperFlo pump footprints
- Compatible with 115V or 208-230V single-phase electrical services
- Connects directly to 2-inch NPT threaded male plumbing adapters
When To Use This
Pro Tip
If replacing a pump tied to an old mechanical timer clock, permanently jump or lock the timer in the ON position to supply uninterrupted line voltage to the digital drive, allowing the onboard clock to govern runtime schedules.
Common Questions & Instructions
Does the Pentair WhisperFlo VST 011533 require replumbing an existing WhisperFlo pad?
No. The WhisperFlo VST 2.6 THP shares the exact dimensions, 2-inch female NPT ports, and centerline heights of legacy single-speed WhisperFlo pumps, making it a direct mechanical drop-in replacement.
Can I wire this variable speed pump to a 115-volt breaker?
Yes. The WhisperFlo VST features auto-sensing electronics that adapt to both 115V and 208-230V single-phase power supplies, eliminating the need to pull new high-voltage wire to your equipment subpanel.
What symptoms indicate my existing WhisperFlo pump needs replacement?
Loud internal bearing screeching, continuous motor drive fault codes, housing thermal deformation, or recurring breaker trips due to aged internal windings indicate the pump assembly should be replaced.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
