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Watts 10 Micron 20" x 4.5" KDF / GAC Filter


Watts 10 Micron 20" x 4.5" KDF / GAC Filter
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in stock
Ships by Tomorrow 4/2/2015

The Watts 10 Micron 20" KDF / GAC Filter Replacement Cartridge (Watts IF-SM-KDF020B) is a 20 inch GAC and KDF filter replacement for use in many water filtration systems, especially whole house filter systems. The Watts IF-SM-KDF020B is a large diameter filter (4 1/2" diameter) that can be used in all 20" x 4.5" Full Flow water filter housings. It lasts up to 5 times longer than standard carbon block filters.

This advanced Watts Intelifil 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, VOCs, THMs, and more down the 10 micron level.

Watts IFSMKDF020B GAC/KDF Filter Replacement Specifications:

  • Connection: Drop in
  • Micron Rating: 10 Micron
  • Temp. Range: 40 - 100 F
  • Dimensions: 20"L x 4.5" Full Flow
  • Flow Rate: About 4 gallons per minute (4 GPM) depending on specific filter system
  • Filter Life: Approximately 6 months or 60,000 gallons depending on usage and local water quality
  • Filter Media: KDF55 media along with granular activated carbon (GAC) - KDF media consists of copper-zinc granules for bacteriostatic filter action

This is a compatible replacement filter for the discontinued Watts KDF55 / GAC 20" Filter Cartridge (GAC-BB20K/1800).

The Watts IF-SM-KDF020B is also known by part number US70238.


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