Pentair System 3 Tank Bottom Kit, 25", Modular/DE | 24851-0103S Billow Durable construction built to endure

Durable construction built to endure regular fireplace use

Classic Arched Styling for Napoleon Gas Fireplaces

It is often recognized when water clarity will not improve despite proper chemistry and filter pressure readings

Manufacturer part number 70-209-502

helping maintain heat efficiency and extending blanket life

Pentair System 3 Tank Bottom Kit, 25", Modular/DE | 24851-0103S Billow Durable construction built to endureWhat This Part Is Used For Pentair 24851 0103S Tank Bottom Kit 25in System III MOD DE is a replacement lower tank kit for compatible 25in System III MOD DE filters. It forms the base housing and supports internal filtration elements. Why This Part Matters A damaged tank bottom can cause leaks and pressure loss. Replacing it restores proper containment and filter integrity. Secure housing supports reliable filtration cycles. Key Features and