Pentair | 523735 | PLUS40 Salt Chlorine Generator Cell – 40K Gallon Capacity, IC40 Replacement (520555)
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The Pentair 523735 PLUS40 Salt Chlorine Generator Cell is a genuine OEM replacement designed for pools up to 40,000 gallons. It replaces the IntelliChlor IC40 (520555) cell and delivers reliable, high-output chlorine production to keep your pool water clean, clear, and comfortable.
Key Features
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Genuine OEM replacement salt cell for PLUS40 systems
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Direct replacement for IntelliChlor IC40 (520555)
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Suitable for pools up to 40,000 gallons
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Produces a steady supply of pure chlorine via electrolysis
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Eliminates the need for handling and storing traditional chlorine
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Long-life titanium blades with corrosion-resistant coating
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Designed for consistent sanitization and reduced maintenance
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Simple installation with compatible control units
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Cell only – control box/power center sold separately
Product Overview
The Pentair 523735 PLUS40 Salt Chlorine Generator Cell provides dependable, high-output sanitation for mid-to-large sized pools. Engineered as a direct replacement for the IntelliChlor IC40 (520555), it uses the proven electrolysis process to convert dissolved salt into pure chlorine, keeping pool water safe, sparkling, and gentle on skin and eyes.
Constructed with heavy-duty titanium blades coated for durability, the PLUS40 cell is built to withstand harsh pool conditions and deliver years of consistent performance. Its compatibility with existing Pentair salt systems allows for quick, hassle-free installation, making it an ideal choice for replacing a worn or expired IC40 cell without upgrading the entire system.
This listing includes the salt cell only, perfect for direct replacement in compatible systems.
Enjoy Cleaner, Clearer, and Silkier Pool Water



The Pentair 523735 PLUS40 Salt Chlorine Generator Cell is a direct replacement for the 520555 model, designed for pools up to 40,000 gallons. It offers enhanced serviceability, accuracy, and value, featuring a modular design, improved diagnostics, and seamless integration with Pentair automation systems.
Key Bullet Points:
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Direct Replacement for 520555: Seamlessly replaces the Pentair IntelliChlor IC40 cell, ensuring compatibility with existing systems.
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Designed for Pools Up to 40,000 Gallons: Ideal for large residential in-ground pools, providing efficient chlorine generation.
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Modular Design for Enhanced Serviceability: Features a modular construction that simplifies maintenance and sensor replacements, reducing service time by over 50%.
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Redesigned Conductivity Sensor: Provides more accurate salt level readings, achieving 98% accuracy compared to laboratory-grade salinity meters.
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Easy-to-Read LCD/LED Interface: Offers over 20 built-in diagnostics and warnings for optimal performance monitoring.
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Acid Cleaning Kit Included: Facilitates routine maintenance and prolongs cell life.
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Seamless Integration with Pentair Automation Systems: Compatible with IntelliChlor Power Center and Pentair automation systems for enhanced control.
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Alternative to Traditional Chlorine Handling: Eliminates the need for buying, handling, storing, and carrying chlorine, reducing chemical exposure and associated risks.
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