Pentair 24851-9001 System 3 Filter Upper Tank Lid Kit - 25in

What This Part Is Used For
The Pentair 24851-9001 System 3 25in Upper Tank Shell Lid Kit is used to replace the upper tank shell lid on compatible System 3 modular media filters. It restores proper sealing and structural integrity at the top of the filter tank during normal operation.

Why This Part Matters
A compromised tank lid can lead to pressure loss, leaks, and unsafe operating conditions. During routine filter cleanings or cartridge replacements, cracks or worn sealing surfaces are often discovered. Replacing the upper shell lid ensures the filter maintains proper internal pressure and safe performance.

Key Features and Specifications

• Pentair manufacturer part number: 24851-9001
• Upper tank shell lid kit
• For System 3 modular media filters
• 25in upper tank configuration
• Replacement for damaged or worn upper tank shell lid

Installation and Fitment Guidance
Shut off pump power and relieve all filter pressure before servicing. Inspect tank sealing surfaces and related hardware during installation. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair is a leading manufacturer of pool and spa filtration and circulation equipment used in residential and commercial applications. Their System 3 filters are widely installed for high-capacity cartridge filtration. Pentair replacement parts are engineered to maintain compatibility and performance across their product lines.

Common Service Context
This lid kit is commonly replaced after freeze damage, overtightening, or stress cracking discovered during seasonal filter cleanings. It is often ordered during major cartridge service or full filter rebuilds.