Pentair WhisperFlo VST (EC-011533)
Pentair
Variable speed from 450 to 3,450 RPM, WEF 8.4 and ENERGY STAR certified, with Pentair's full manual and 115 or 230 V operation without rewiring.
Best for Most in-ground pools, especially larger ones or with long pipe runs, a heater or water features.
| Type | Variable speed |
|---|---|
| Total horsepower | 2.6 THP |
| Speed range | 450 to 3,450 RPM |
| Voltage | 115 to 230 V |
| WEF | 8.4 |
| Ports | 2 in. |
What we like
- Lowest running energy of these picks when run slowly (DOE physics)
- Full manual and default schedule
- Drop-in replacement for WhisperFlo pumps (Pentair)
Worth knowing
- Hard-wired install: electrician work
- Large for a small, filter-only pool
It is the pump type the rules are moving to, from a brand that documents everything, and it can run slowly for hours on little power.
It needs programming and a proper electrical install, and a small pool may not need 2.6 THP.
Based on: Pentair's WhisperFlo VS / VST Installation and User's Guide and product page, checked October 2026.





