Pentair 356878Z IntelliFlo Variable Speed Drive Unit (No Keypad) — i1, i2, 2 VST, VS, IntelliFloXF, Genuine OEM
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The Pentair 356878Z Drive Unit is the genuine OEM variable-speed drive (no keypad) for IntelliFlo and IntelliFloXF pumps. When the drive on your pump fails but the motor and wet end are still sound, this restores full variable-speed control without the cost of a complete new pump.
Key Features
- Genuine Pentair OEM drive: Correct fit and factory performance for the IntelliFlo platform.
- Drive only — no keypad: Reuse your existing keypad, or pair with keypad 357527Z.
- Wide IntelliFlo compatibility: Fits i1, i2, IntelliFlo 2 VST, IntelliFlo VS, and IntelliFloXF pumps.
- Restores variable-speed control: Full programmable RPM range for filtration, heating, cleaning, and water features.
- RS-485 automation ready: Works with IntelliCenter, IntelliTouch, and EasyTouch systems.
- Energy efficient: Precise speed control lowers operating cost versus single-speed operation.
Specifications
- Part Number: 356878Z
- Type: Variable-speed drive unit (no keypad)
- Fits: IntelliFlo i1 (011059), i2 (011060), 2 VST (011055), VS (011028), IntelliFloXF VS (022005, 022055)
- Companion Keypad: 357527Z
- Brand: Pentair — genuine OEM
What's Included / Not Included
- Included: Drive unit
- Not included: Keypad, motor, or pump housing
Frequently Asked Questions
Does the Pentair 356878Z include a keypad?
No — this is the drive only. You can reuse your existing working keypad, or order keypad 357527Z separately. If you'd prefer a complete drive-plus-keypad kit, see part 356879Z.
What's the difference between 356878Z and 356879Z?
The 356878Z is the drive only (no keypad). The 356879Z is the full kit with keypad included. Both cover the same IntelliFlo pump range — choose the 356878Z if your keypad is still good, the 356879Z if you need both.
Which pumps does it fit?
IntelliFlo i1, i2, 2 VST, VS, and IntelliFloXF VS pumps. It does not fit the IntelliFlo VS+SVRS (that uses drive 356910Z/356911Z) — confirm your pump model before ordering.
Do I need a professional to install it?
Yes. This is a high-voltage component — a qualified pool professional should install it. Disconnect power at the breaker first, and reprogram your RPM schedules after installation.
Will it work with my automation system?
Yes — it's RS-485 ready and works with Pentair IntelliCenter, IntelliTouch, and EasyTouch automation.
Should I replace the drive or the whole pump?
If the drive has failed (error codes, no power to the motor, burnt terminal) but the motor and wet end are still good, replacing just the drive is far more economical than a complete pump.
Frequently asked questions
Is a variable speed pump worth it?
Variable speed pumps draw dramatically less power at low speed because energy use falls far faster than flow does. Many jurisdictions now require variable speed for new and replacement residential pool pumps above a certain horsepower, so check local code before buying single-speed.
What is the part number for this pump?
Pentair lists this pump under part number 356878Z. Quote 356878Z when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
How do I match a pump to my pool?
Work from the plumbing rather than the pool size: line diameter, total dynamic head and the flow your filter and heater can accept all cap the useful pump size. An oversized pump on undersized plumbing wastes power and can exceed the filter's rated flow.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
What do I need to check before installing this pump?
Confirm the voltage, the union or port sizes and the mounting footprint against your existing installation. Pump replacement usually involves electrical connections and may require a licensed electrician depending on local requirements.
Is there a warranty on this pump?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.