Pentair 523735-EC IntelliChlor Plus40 salt chlorine generator cellPentair IntelliChlor Plus40 Salt Chlorine Generator Replacement Cell, 40,000 Gallons, 523735-EC In stock$1,81900 Web Price
Pentair 523735-EC IntelliChlor Plus40 salt chlorine generator cell
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Pentair IntelliChlor Plus40 Salt Chlorine Generator Replacement Cell, 40,000 Gallons, 523735-EC

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Quick overview

  • Drop-in for the IC40 the same length as the original IC40 and runs on existing IntelliChlor power centers, so there is no replumbing.
  • Pools to 40,000 gallons sized for large residential pools.
  • Modular design the onboard computer separates from the cell, so you acid clean the cell without handling the electronics, and sensors and electronics are field replaceable.
  • SmartSense output control cuts chlorine production when the pump is off or the cover is closed, which extends cell life.
  • Diagnostics on the display LCD/LED interface with more than 20 built in diagnostics and warnings, plus live status, salt level and output.
  • Self cleaning regular polarity reversal limits scale on the plates, and an acid cleaning kit with stand is in the box.
Full description and specifications ↓

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Product details

The Pentair IntelliChlor Plus40 is the 2025 salt chlorine generator cell for pools up to 40,000 gallons. It converts ordinary salt into chlorine in the return line, so there is no chlorine to buy, carry or store. It is the direct replacement for the IntelliChlor IC40: the same length, and fully compatible with existing IntelliChlor power centers and Pentair automation, so it drops in with no replumbing.

Modular, and easier to live with

The onboard computer separates from the cell. That means the cell can go into the acid cleaning stand without the electronics coming near the acid, an improvement over earlier units that had to be handled as one piece. It also means sensors and electronics can be replaced individually in the field instead of writing off the whole unit.

Smarter output

SmartSense adjusts chlorine generation when the pump is off or the pool cover is closed, so the cell is not producing chlorine nobody needs, and its life is extended accordingly. A redesigned conductivity sensor gives more accurate salt readings. The LCD/LED display shows real time status, output level and salt level, with more than 20 built in diagnostics and warnings. Regular polarity reversal keeps scale off the plates between manual cleanings, and an acid cleaning kit ships with every unit.

New to salt?

If you are building a system from scratch and do not already have a power center, you will also need the Pentair IntelliChlor Power Center, EC-520556. It runs on 110/220V, includes the power cable, and works with EasyTouch and IntelliTouch automation.

From Pool School

How to Clean a Salt CellHose first, acid only on scale that stays, and each manufacturer's own mix and time limit. Read When to Replace a Salt CellThe life each manufacturer prints, what looks like a dead cell and is not, and choosing the next one. Read Generic vs OEM Salt CellsWhat you can compare on paper between the original and another manufacturer's cell, and what you cannot. Read
Specifications
Brand Pentair
Manufacturer part number 523735-EC
UPC 788379918644
Type Salt chlorine generator cell
Pool size Up to 40,000 gallons
Replaces Pentair IntelliChlor IC40
Length Same as the IC40
Power center Works with existing IntelliChlor power centers; EC-520556 required for a new installation
Automation Compatible with Pentair EasyTouch and IntelliTouch
Display LCD/LED with 20+ built in diagnostics and warnings
Output control SmartSense
Salt sensor Redesigned conductivity sensor
Cleaning Polarity reversal self cleaning; acid cleaning kit and stand included
Model year 2025
Shipping weight 9.05 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Will this replace my IntelliChlor IC40?
Yes. The Plus40 is the same length as the IC40 and works with the existing IntelliChlor power center, so it drops into the same spot with no replumbing.
Do I need to buy a power center?
Only if you are starting from nothing. An existing IntelliChlor power center runs the Plus40. For a new installation you need the Pentair IntelliChlor Power Center, EC-520556, which is 110/220V, includes the power cable and works with EasyTouch and IntelliTouch automation.
Can I clean the cell without damaging the electronics?
Yes. The onboard computer separates from the cell, so the cell goes into the acid cleaning stand on its own. Earlier models had to be handled as one piece.
What does SmartSense do?
It adjusts chlorine generation automatically, cutting output when the pump is off or the pool cover is closed. Less wasted output means longer cell life.
Ask your own question