Pentair Lid Assembly 48 Sq Ft FNS Plus | 170021

Pentair 170021 Tank Lid Assembly for FNS Plus 48 Sq Ft DE Filter

Genuine Pentair 170021 tank lid assembly for FNS Plus 48 Sq Ft DE filters. Durable, corrosion-resistant construction ensures long-lasting performance.

Features

• Genuine Pentair replacement part (170021)
• Compatible with FNS Plus 48 Sq Ft DE filters
• Constructed from fiberglass-reinforced polypropylene
• Resistant to pool chemicals and UV degradation
• Includes high-flow manual air relief valve
• Designed for residential pool and spa applications
• Easy to install and maintain

Description

The Pentair 170021 Tank Lid Assembly is a direct replacement for the FNS Plus 48 Sq Ft DE filter. Constructed from fiberglass-reinforced polypropylene, it offers superior strength and resistance to pool chemicals and UV degradation. This assembly includes a high-flow manual air relief valve, facilitating a straightforward installation process. Designed for residential pool and spa systems, it helps maintain optimal filtration efficiency and system integrity.

Pro Tip

When replacing the tank lid assembly, ensure the air relief valve is properly installed to prevent air buildup, which can affect filtration performance.

Related Parts

• Pentair 170017 Tank Bottom Assembly for FNS Plus 48 Sq Ft Filter
• Pentair 190034 Standpipe Assembly for 48 Sq Ft Filter
• Pentair 190043 Inlet Pipe Assembly for 48 Sq Ft Filter

Installation Tips

Ensure the filter is completely depressurized before beginning installation. Verify compatibility with your specific filter model to prevent installation issues.

We want you to have quick and easy access to warranty information for all the brands we carry. Please click on the links below to view each manufacturer’s warranty page:

• Pentair Warranty
  
• A&A (Pentair In-Floor) Warranty
  
• Fluidra Warranty (Zodiac / Jandy / Polaris / Caretaker)
  
• Paramount Warranty
  
• BlueSquare Warranty
  
• Hayward Warranty
  
• All Other Manufacturer Warranties
  

Note: Warranty coverage, registration, and service terms are provided directly by the manufacturer. Please review the details carefully to ensure proper understanding of coverage and claim procedures.