Product Overview

The Pentair Tank O-Ring (87300400Z) is a genuine replacement sealing ring designed for Pentair Clean & Clear®, Posi-Clear®, and Predator® pool filter tanks. This O-ring forms the critical seal between the filter tank halves, preventing water leaks and maintaining proper pressure inside the filtration system.

Made from durable, chemical-resistant rubber, this replacement O-ring restores the watertight seal of your filter and helps ensure optimal filtration performance.

Ideal For

• Replacing worn, cracked, or leaking filter tank O-rings

• Routine maintenance of Pentair cartridge filters

• Restoring proper pressure and sealing in filter tanks

• Pool owners performing seasonal equipment servicing

Key Features

• Genuine Pentair Replacement Part

• Compatible with Multiple Filter Models

• High-Quality Rubber Construction

• Maintains Proper Tank Seal

• Resistant to Pool Chemicals and Pressure

Benefits

• Prevents Water Leaks from the filter tank seam

• Maintains Proper Filtration Pressure

• Extends the Life of Your Filter System

• Simple Replacement During Routine Maintenance

• Ensures Safe, Reliable Filter Operation

Compatibility

This O-ring is designed for use with:

• Pentair Clean & Clear® Cartridge Filters

• Pentair Posi-Clear® Cartridge Filters

• Pentair Predator® Cartridge Filters

Compatible with multiple models within these product lines.

Always verify part compatibility with your specific filter model before ordering.

Installation Notes

• Turn off the pump and relieve system pressure before servicing

• Remove the filter tank clamp and separate the tank halves

• Clean the O-ring groove before installing the new seal

• Lightly lubricate the O-ring with pool-safe silicone lubricant before installation

• Reassemble and tighten according to manufacturer specifications

Customer-Facing Q&A

Q: What does this O-ring do?
A: It seals the connection between the upper and lower halves of the filter tank to prevent leaks.

Q: How do I know if my O-ring needs replacement?
A: Signs include water leaking from the tank seam, visible cracks, flattening, or dry rubber.

Q: Should I lubricate the O-ring before installation?
A: Yes, applying a silicone-based pool lubricant helps create a better seal and extends the life of the O-ring.

Q: Is this an OEM Pentair part?
A: Yes, part 87300400Z is a genuine Pentair replacement component.

Product Details

• Product Name: Pentair Filter Tank O-Ring

• Part Number: 87300400Z

• Compatibility: Clean & Clear®, Posi-Clear®, Predator® Filters

• Application: Pool Filter Tank Seal

• Brand: Pentair®

• Condition: New