Pentair IntelliFlo VSF
What Pentair called the first variable speed and flow pump — it held a flow rate, not just a speed. No longer made.
3.95 THP · 230V · variable speed and flow
What we repair on the Pentair IntelliFlo VSF
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
- Adds three warnings to the IntelliFlo alarms: Speed Limit, Pressure Limit, Flow Limit.
- Shaft seal 071734S; drive 356880Z (kit 356944Z).
The facts, from Pentair
- Type
- Variable speed and flow
- For
- In-ground pools
- Ratings
- 3.95 THP
- Voltage
- 230V
- Maximum flow
- — not stated by the manufacturer
- Controls
- Rotatable keypad, 8 speed or flow settings
- RS-485 to Pentair automation
- Works between 20 and 140 GPM
- Permanent-magnet synchronous TEFC motor
| Model number | What it is |
|---|---|
| 011056 | IntelliFlo VSF |
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 →Our suggestion: Pentair's current variable-speed pump nearest in rating — we size the real replacement to your pool and plumbing.
Pentair IntelliPro3 VSF
The Sta-Rite-branded twin of the IntelliFlo3 VSF — the same installation guide, the same app control.
1.5 THP · 3.0 THP · 115/208-230V (1.5 THP) · 208-230V (3.0 THP)
Specs, repairs & install →Our suggestion: Pentair's current variable-speed pump nearest in rating — we size the real replacement to your pool and plumbing.
Where these facts come from
- Pentair — IntelliFlo VSF (discontinued)
- Pentair — IntelliFlo VSF manual
- 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.