Empty Refillable Filter Cartridge for 20" Big Blue Housing
The Big Blue 20" empty cartridge shell allows you to make your own custom whole house filter to treat exactly what you want in your water. Or, you can save money and refill it after the media is exhausted several times over. It includes the shell, seal, extra thick foam sediment pad, and shrink-wrap plastic sleeve that can be used to seal the filter for storage or resale. The filter measures 4.5" in diameter and 20" long and fits all standard 20" Big Blue housings.