Product Overview

The Pentair BioShield High Output UV System is designed to provide supplemental ultraviolet water treatment for residential swimming pools and spas. This 120-watt model uses a low-pressure, high-output UV lamp to expose circulating pool water to UV-C light as it passes through the treatment vessel. The 522637 is rated for up to 62 GPM at a 40 mJ/cm² UV dose and operates on either 115V or 230V power, making it a versatile addition to compatible pool circulation systems.

Important Purchase Notice

Pentair classifies the BioShield UV System as a TradeGrade product. Warranty eligibility may depend on how and where the product is purchased and installed. Pentair currently states that TradeGrade products sold online outside its TradeGrade policy receive limited warranty coverage. Confirm current Pentair warranty eligibility before ordering.

Ideal For

• Residential pools and spas needing supplemental UV water treatment

• Pool systems seeking improved water-quality management alongside normal chemical sanitation

• Equipment pads requiring a dual-voltage 115/230V UV system

• Applications requiring approximately 62 GPM capacity at a 40 mJ/cm² UV dose

Key Features

• 120-watt low-pressure, high-output T6-style UV lamp

• 37 watts of UV-C output

• Dual-voltage 115/230V operation

• Maximum load of 1.15A at 115V and 0.57A at 230V

• Heavy-wall, UV-resistant high-density polymer vessel

• Visual lamp-status viewing ports

• Removable vessel end cap for easier internal service access

• Sealed in-line power supply designed for wet equipment environments

• Flow-switch protection integrated into the system

• Maximum vessel pressure rating of 50 PSI

Benefits

BioShield UV adds another layer of water treatment to an existing pool sanitation system without replacing the primary sanitizer. The high-output UV lamp exposes circulating water to UV-C energy while maintaining relatively low electrical demand.

The polymer vessel is resistant to corrosion associated with pool environments, while the removable end cap and viewing ports simplify inspection and maintenance.

The system's dual-voltage capability gives installers flexibility when integrating it into new or existing equipment pads.

Compatibility

The 522637 is designed for compatible residential pool and spa circulation systems. Pentair lists inlet and outlet configurations capable of accommodating 2-inch, 2.5-inch, or 3-inch union connections.

System selection should be based on actual water flow and required UV dose. Pentair rates this model at:

• 79 GPM at 30 mJ/cm²

• 62 GPM at 40 mJ/cm²

• 41 GPM at 60 mJ/cm²

Do not size a UV system by pipe diameter alone.

Installation & Maintenance Context

Install the BioShield UV system according to Pentair's plumbing, electrical, flow-direction, clearance, and service-access requirements. Professional installation is recommended.

The UV lamp and quartz sleeve are serviceable components. The correct replacement lamp for this model is Pentair 523037, and the matching quartz sleeve is 523041.

What's Included

The system incorporates the UV treatment vessel, high-output UV lamp, external ballast/power supply, lamp cabling, and flow-switch system.

Confirm Before Ordering

Confirm:

• Required UV treatment flow rate

• 115V or 230V electrical availability

• Available installation space

• Plumbing connection requirements

• Maximum system pressure

• Required UV dose for the application

Specifications

Customer Q&A

Is the Pentair 522637 a 65 GPM UV system?

Pentair's current specifications rate the 522637 at 62 GPM when sized at a 40 mJ/cm² UV dose. Flow capability changes depending on the required UV dose.

Does BioShield replace chlorine or a salt chlorine generator?

No. BioShield UV is supplemental water-treatment equipment and should be used with an appropriate primary pool sanitation system.

Can the 522637 operate on either 115V or 230V?

Yes. Pentair specifies the 522637 for 115/230V operation.

What replacement UV lamp does it use?

The correct Pentair replacement lamp is 523037, a 120-watt BioShield UV lamp. The corresponding replacement quartz sleeve is 523041.