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.

Specifications

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.