Product Overview

The Pentair 520588 dummy or “pass-through” cell is an OEM accessory designed for use with Intellichlor® salt-chlorination systems. It allows water to circulate through the system without engaging the active salt cell — ideal during winterization, start-up, or when the chlorinator is temporarily out of service. Using this bypass helps protect the main salt cell from unnecessary wear, chemical exposure or damage during low-use periods.

Ideal For

• Pool owners preparing their salt-chlorination system for winter, where the Intellichlor® active cell will not be generating chlorine.

• Start-up or pre-plaster phases where the active salt cell should be isolated to avoid heavy fouling or damage.

• Service professionals recommending preventive maintenance to extend the life of the active salt cell by using a bypass during dormancy.

• Installations where continuous water flow is required but chlorine generation is not needed or should be paused.

Key Features

• Dedicated Pass-Through Design – permits normal water flow while bypassing chlorine generation.

• Models Compatibility – fits Intellichlor® systems including models IC15, IC20, IC40, IC60 and related Pentair control setups. Winterization & Start-Up Utility – protects the active salt cell by removing it from service during non-use periods. 

• Compact Form Factor – dimensions approximate 17″ in width by 4″ in height by 4″ length. 

• OEM Quality Construction – designed by Pentair to factory standards for proper fit, material and long-term reliability.

Customer-Facing Q&A

Q: Why would I use a dummy cell instead of the regular salt cell?
A: When your pool will be idle, or you’re starting it up and do not want the salt cell to generate chlorine (which may lead to scale build-up or damage), the dummy cell allows full water flow without the electrolysis process.

Q: Will this fit my Intellichlor system?
A: Yes, it is designed for Intellichlor® models IC15, IC20, IC40, IC60 from Pentair. Always verify your system model number before purchase.

Q: Is installation complicated?
A: Installation is straightforward: you remove the active cell, insert the dummy pass-through unit, secure wiring and plumbing, and resume flow. Always follow safe pool-equipment procedures.

Q: Does this generate any chlorine?
A: No — this unit is for bypass only; it will not generate chlorine. It is intended for periods when chlorine generation is not required but water flow is.

Q: Is this only for winter use?
A: While winter is a common use-case, it is also useful during start-up, maintenance service periods or any time you want to pause chlorine generation while maintaining water circulation.