Pentek - 20" x 2.5" Empty Fillable Cartridge Shell 0.2 - 2 GPM PDI certified

PDI certified

High-volume design

check the o-ring for wear

The Harmsco HB-20-5W is a 20-inch pleated sediment cartridge engineered for Big Blue 20" x 4

Best used with compensated hardness calculations that account for total mineral content of your source water

Pentek - 20" x 2.5" Empty Fillable Cartridge Shell 0.2 - 2 GPM PDI certifiedPentek 20" x 2. 5" Empty Fillable Cartridge Shell Custom filtration media housing for specialized water treatment applications Food Grade Construction 20" Standard Size Refillable Design Media Customizable The Pentek empty fillable cartridge shell gives you complete control over your filtration media. This 20 inch housing lets you create custom blends of activated carbon, specialty resins, bone char, KDF, or other media tailored to your specific water