Pentair IntelliFlo VS
Pentair's long-running variable-speed pump. Pentair names the IntelliFlo3 VSF as its replacement.
3.95 THP · 230V · variable-speed
What we repair on the Pentair IntelliFlo VS
A permanent-magnet motor run by an electronic drive — no start capacitor to replace. When one fails we read the drive's own fault before touching a part.
- Drive or keypad showing a fault, or the display dark — diagnosed against the manufacturer's fault list
- Not answering the automation or app — communication wiring and settings
- Speeds and schedules set wrong — reprogrammed for this pool, so it runs slow and quiet most of the day
- Leaking at the shaft seal (water under the motor) — a new mechanical seal before the bearings rust
- Air in the basket and losing prime — lid o-ring, basket, drain plugs, suction-side unions
- Loud grinding or screeching — worn motor bearings
- Low flow — impeller clogged or worn, diffuser gasket, basket
- Cracked strainer housing, lid or basket
From Pentair's manual
- Alarms: Power Out (supply under 170 VAC), Priming Failure (retries after 10 minutes; a hard stop after five failures), Overheat, Over Current, Over Voltage, Internal Error.
- Shaft seal 071734S (ozone/salt-resistant 071732S); seal plate kit 350202 / 350203.
- Current drive 356878Z (kit 356879Z); keypad 357527Z; motor 350305S.
- The pump will not start while the impeller is already turning.
The facts, from Pentair
- Type
- Variable-speed
- For
- In-ground pools
- Ratings
- 3.95 THP
- Voltage
- 230V
- Maximum flow
- — not stated by the manufacturer
- Controls
- Rotatable keypad, 8 programmable speeds
- RS-485 to Pentair automation or IntelliComm
- Permanent-magnet synchronous TEFC motor, 450–3450 RPM
- Built-in diagnostics
| Model number | What it is |
|---|---|
| 011028 | IntelliFlo VS |
| 011018 | Earlier IntelliFlo VS |
If it is time to replace it
Repair first when it makes sense. When the housing is cracked, the motor is failing on an old single-speed, or the parts are no longer made, these are the pumps to look at:
Pentair IntelliFlo3 VSF
Pentair's current variable speed and flow pump: it holds a set flow rather than just a speed, and runs from the Pentair Pool app over Wi-Fi.
1.5 THP · 3.0 THP · 115/208-230V (1.5 THP) · 208-230V (3.0 THP)
Specs, repairs & install →Pentair names it as the replacement.
Where these facts come from
- Pentair — IntelliFlo VS (discontinued notice)
- Pentair — IntelliFlo VS manual
- Pentair — IntelliFlo replacement parts
- Pentair — pool pump parts catalog
Checked against Pentair's own pages on 2026-09-23. Manufacturers change their lineups — if something here no longer matches, the manufacturer's page is right and we will fix ours.