Pentair System 3 Tank Bottom Kit, 21", Modular/DE | 24850-0102S Salt Systems Consistent birch color and texture

Consistent birch color and texture for a natural look

Choosing Waterway Plastics helps ensure supply chain stability and compatibility with existing Waterway components in professional builds

This pump is a core component of pool water care and filtration maintenance

Maintaining housing integrity protects overall circulation

Pentair System 3 Tank Bottom Kit, 21", Modular/DE | 24850-0102S Salt Systems Consistent birch color and textureWhat 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