Product Overview

The Pentair Flow Switch with Connector 523458 is a genuine OEM replacement flow switch designed for Pentair BioShield UV systems. This flow switch helps monitor water movement through the UV chamber and allows the system to operate only when proper flow is detected.

A working flow switch is an important safety and performance component for BioShield UV systems. It helps prevent the UV system from activating without water flow, which can protect the lamp, chamber, and related components from potential overheating or premature damage.

Ideal For

Pentair BioShield UV system repairs
Replacing a failed flow switch
Flow fault troubleshooting
UV sanitizer maintenance
Pool service technicians
Commercial pool equipment maintenance
Residential pool UV system repairs

Key Features

Genuine Pentair OEM replacement part
Designed for Pentair BioShield UV systems
Includes flow switch with connector
Helps detect water flow through the UV chamber
Supports safe UV system operation
Helps prevent dry operation of the UV lamp/chamber
Important replacement part for flow-related fault issues
Single replacement unit for service repairs

Benefits

The Pentair 523458 flow switch helps keep the BioShield UV system operating correctly by confirming that water is moving through the system before the UV unit activates. If the existing flow switch is damaged, disconnected, or no longer reading properly, the UV system may fail to start, shut down unexpectedly, or display a flow-related fault.

Using a genuine Pentair replacement part helps ensure proper fit, connection, and system compatibility on approved BioShield UV models.

Specifications

Customer-Facing Q&A

What does the Pentair 523458 flow switch do?
It monitors water flow through the Pentair BioShield UV system and helps allow the UV unit to operate only when proper flow is present.

Which systems does this fit?
This flow switch is commonly listed for Pentair BioShield UV models 522635, 522636, 522637, and 522638. Some listings also show compatibility with 522945. Always confirm your exact BioShield UV model before ordering.

Does this include the connector?
Yes. This part is sold as a flow switch with connector.

Is this a complete UV sanitizer?
No. This is a replacement flow switch only. It does not include the UV chamber, lamp, ballast, quartz sleeve, or complete BioShield system.

When should this part be replaced?
Replace it if the BioShield UV system is showing a flow fault, failing to activate when water is flowing, shutting off unexpectedly, or if the switch or connector is visibly damaged.

Is this an OEM Pentair part?
Yes. This listing is for a genuine Pentair OEM replacement flow switch with connector.

Confirm Before Ordering

Confirm your BioShield UV model number before ordering. This part is commonly used on Pentair BioShield UV models 522635, 522636, 522637, and 522638, with additional compatibility sometimes listed for 522945. Always shut off power and water flow before servicing UV equipment. UV sanitation systems should be serviced by a qualified pool professional or technician familiar with electrical pool equipment.