The Pentair FNS Filter Plus Series 21.5" Diameter Fiberglass D.E. Filter for Pools with 120 GPM Flow Rate, 60 sq. ft. Filter Area, and 86,400 Gallon Turnover Capacity (180009) is a high-performance diatomaceous earth (D.E.) pool filtration system designed to deliver superior water clarity, efficient filtration, and reliable operation for large residential swimming pool applications. Built with a durable fiberglass tank and advanced D.E. filtration technology, this filter effectively captures fine particles and impurities to help maintain cleaner and clearer pool water.

The Pentair FNS Filter Plus 180009 features a 60 square foot filter area, 120 GPM maximum flow rate, and 86,400 gallon turnover capacity, making it ideal for larger residential pool systems requiring dependable filtration performance. Its corrosion-resistant fiberglass construction provides long-term durability, while the D.E. filtration process delivers enhanced water quality compared to traditional filtration methods.

Key Features

• 60 sq. ft. Filter Area – Provides high-capacity filtration for large residential pool systems
• 120 GPM Flow Rate – Supports efficient water circulation and filtration performance
• 86,400 Gallon Turnover Capacity – Designed for large swimming pool applications
• Diatomaceous Earth (D.E.) Filtration Technology – Captures fine particles for improved water clarity
• Fiberglass Tank Construction – Provides corrosion resistance and long-lasting durability
• FNS Filter Plus Series Design – Engineered for reliable and efficient pool filtration
• High-Efficiency Filtration Performance – Helps remove dirt, debris, and microscopic contaminants
• Durable Outdoor Construction – Designed for long-term pool operation

Product Specifications

• Brand: Pentair
• Series: FNS Filter Plus Series
• Model: 180009
• Product Type: Fiberglass D.E. Pool Filter
• Tank Diameter: 21.5 inches
• Filter Area: 60 sq. ft.
• Maximum Flow Rate: 120 GPM
• Turnover Capacity: Up to 86,400 gallons
• Filtration Type: Diatomaceous Earth (D.E.) Filter
• Application: Residential Swimming Pools

Benefits

• Provides superior water clarity through advanced D.E. filtration
• Helps capture smaller particles for cleaner pool water
• Fiberglass construction supports durability and corrosion resistance
• Reduces maintenance needs with efficient filtration performance
• Supports effective pool circulation and water quality management
• Designed for reliable long-term residential pool operation

Compatibility & Installation

The Pentair FNS Filter Plus Series 180009 D.E. Filter is designed for:

• Large residential swimming pools
• High-capacity pool filtration systems
• New pool installations
• Replacement filtration applications
• Pool equipment upgrades

Installation considerations:

• Confirm filter sizing based on pool volume and pump flow requirements
• Use the correct D.E. media amount according to manufacturer specifications
• Ensure compatibility with existing pool plumbing and circulation equipment
• Maintain proper operating pressure for optimal filtration performance
• Follow manufacturer installation guidelines
• Professional pool equipment installation is recommended

Frequently Asked Questions

What is the filter area of the Pentair 180009?
The filter provides a 60 square foot filtration area.

What is the maximum flow rate of this D.E. filter?
The Pentair 180009 supports a flow rate of up to 120 GPM.

How large of a pool can this filter support?
This filter is designed for pools with a turnover capacity of up to 86,400 gallons.

What type of filtration does the Pentair 180009 use?
This model uses diatomaceous earth (D.E.) filtration technology for enhanced water clarity.

What series does this filter belong to?
This model is part of the Pentair FNS Filter Plus Series.