Watts KDF55 / GAC 20" Big Blue Filter Cartridge
The Watts GAC-BB20K/1800 has been discontinued. The Watts IF-SM-KDF020B is a suitable replacement.
The Watts GAC-BB20K/1800 is a 20 inch Big Blue KDF and GAC filter replacement for use in many water filter systems. The Watts GAC-BB20K/1800 is a large diameter filter (4 1/2" diameter) that can be used in all 20" x 4.5" Big Blue/Full Flow water filter housings.
This advanced Watts water filter replacement cartridge primarily reduces the bad taste and odor of chlorine and other chemicals in water. It is a multi-purpose water filter cartridge that uses a combination of bacteriostatic KDF-55 filter media plus coconut shell granular activated carbon (GAC) to reduce heavy metals such as aluminum, arsenic, mercury, cadmium, copper, iron, lead, and other water soluble heavy metals as well as particulates like sediment, dirt, rust, sand, silt, limescale, bacteria, algae, and more.
Watts GAC-BB20K/1800 GAC/KDF Filter Replacement Specifications:
- Connection: Drop in
- Temp. Range: 40 - 100 F
- Micron Rating: Not rated
- Dimensions: 20"L x 4.5"D (Big Blue/Full Flow)
- Filter Life: Approximately 6 months or 20,000 gallons depending on usage and local water quality
- Flow Rate: About 4 gallons per minute (4 GPM) depending on specific filter system
- Filter Media: KDF55 media (4 pounds) along with granular activated carbon (GAC) - KDF media consists of copper-zinc granules for bacteriostatic filter action
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