Pentair 24850-0102S Bottom Tank Kit - 21in, Sys III, Mod/DE

What This Part Is Used For
Pentair 24850-0102S Bottom Tank Kit is a replacement lower tank section for 21in System III Mod/DE filter assemblies. It forms the base housing that supports the internal filter components.

Why This Part Matters
A cracked or leaking lower tank can cause pressure loss and water leakage around the equipment pad. Replacing the bottom tank restores structural integrity and proper filtration performance. This is critical after freeze damage or long-term stress cracks.

Key Features and Specifications

• Manufacturer part number: 24850-0102S
• Bottom tank kit
• 21in size
• For System III Mod/DE filters
• Forms lower housing of filter Assembly
• Confirm exact filter model before ordering

Installation and Fitment Guidance
Drain and disassemble the filter before replacing the tank section. Inspect internal components and seals during reAssembly. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair manufactures a full line of filtration systems and replacement parts. Their filters are commonly installed in residential and commercial pool applications. Pentair replacement components are supported through established distribution networks. The brand maintains long-term service part availability.

Common Service Context
This part is typically replaced after freeze splits, impact damage, or persistent tank leaks. It is also installed during major filter rebuilds when structural damage is found.