Filter cartridge Big Blue - 20 inch empty filter housing

The ES-20BB is a Big Blue 20-inch refillable filter cartridge, designed to offer maximum flexibility for custom water filtration systems. This empty cartridge allows you to fill it with your choice of filtration media—such as activated carbon, KDF, softening resin, or ceramic balls—tailored to your specific water treatment needs.

Built for durability and easy integration, the ES-20BB fits all standard Big Blue 20" filter housings and is ideal for residential, commercial, and light industrial applications that require high-capacity, customized filtration.

Key Features

• Refillable 20" cartridge for Big Blue housings

• Compatible with various filtration media

• Heavy-duty construction for long-term use

• Perfect for high-volume custom filtration setups

• Easy to fill, clean, and reuse

Applications

• Whole-house or point-of-entry water filtration systems

• Custom treatment of chlorine, heavy metals, sediment, or hardness

• Pre-treatment for reverse osmosis systems

• Commercial and agricultural water treatment

Get the flexibility you need with the ES-20BB Big Blue 20" Empty Cartridge, available at Pure Water 4 Life—ideal for creating your own targeted water purification solution.