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Pentek - GAC-20 - 20" x 2.5" Granular Activated Carbon Filter

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Pentek - GAC-20 - 20" x 2.5" Granular Activated Carbon Filter

The Pentek GAC-20 is a 20-inch granular activated carbon filter designed for full-contact chlorine and taste reduction in whole-house and well water systems. Its flow-through design with internal expansion pad and 20-micron post-filter ensures maximum carbon contact without channeling or bypass.
SPECIFICATIONS

Pentek GAC-20 Technical Details

Dimensions 20" x 2.5" (2-7/8" OD x 20" length)
Filter Media Granular Activated Carbon (GAC)
Post-Filter 20-micron spun polypropylene
Flow Rate 2 GPM at 16 psi pressure drop
Filter Life Up to 10,000 gallons
Temperature Range 40°F to 145°F
Housing Compatibility Standard 20" x 2.5" filter housings
End Cap Material Polystyrene with polystyrene outer casing
INSTALLATION & USE

Installing Your GAC-20 Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet before removing the filter housing sump.
  2. Remove the old cartridge and clean the housing sump with mild soap and water, checking the o-ring for wear or damage.
  3. Insert the Pentek GAC-20 vertically into the housing, ensuring it seats properly on the center post without forcing or tilting.
  4. Lubricate the o-ring with food-grade silicone grease, thread the sump back onto the housing cap, and hand-tighten firmly.
  5. Turn water supply back on slowly and check for leaks, then flush the system for 3-5 minutes to clear carbon fines and activate the filter bed.
COMPATIBILITY

Where the GAC-20 Works Best

The Pentek GAC-20 fits all standard 20-inch filter housings with 2.5-inch diameter cartridge capacity, making it compatible with most whole-house and well water filtration systems. It is effective for municipal and well water applications where chlorine taste and odor, organic chemicals, and general water taste issues are present. This filter works best as a second or third stage after sediment pre-filtration to protect the carbon bed from premature fouling. The flow-through design and 20-micron post-filter make it suitable for moderate flow rate applications up to 2 GPM in residential and light commercial settings.

🔧 Pro Tip: Always install a 5-micron sediment filter upstream of the GAC-20 to extend carbon life and prevent the granular media from clogging with particulate. Mark your installation date on the filter housing with a grease pencil so you can track the 10,000-gallon service life accurately.
The Pentek GAC-20 is a 20-inch granular activated carbon filter designed for full-contact chlorine and taste reduction in whole-house and well water systems. Its flow-through design with internal expansion pad and 20-micron post-filter ensures maximum carbon contact without channeling or bypass.
SPECIFICATIONS

Pentek GAC-20 Technical Details

Dimensions 20" x 2.5" (2-7/8" OD x 20" length)
Filter Media Granular Activated Carbon (GAC)
Post-Filter 20-micron spun polypropylene
Flow Rate 2 GPM at 16 psi pressure drop
Filter Life Up to 10,000 gallons
Temperature Range 40°F to 145°F
Housing Compatibility Standard 20" x 2.5" filter housings
End Cap Material Polystyrene with polystyrene outer casing
INSTALLATION & USE

Installing Your GAC-20 Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet before removing the filter housing sump.
  2. Remove the old cartridge and clean the housing sump with mild soap and water, checking the o-ring for wear or damage.
  3. Insert the Pentek GAC-20 vertically into the housing, ensuring it seats properly on the center post without forcing or tilting.
  4. Lubricate the o-ring with food-grade silicone grease, thread the sump back onto the housing cap, and hand-tighten firmly.
  5. Turn water supply back on slowly and check for leaks, then flush the system for 3-5 minutes to clear carbon fines and activate the filter bed.
COMPATIBILITY

Where the GAC-20 Works Best

The Pentek GAC-20 fits all standard 20-inch filter housings with 2.5-inch diameter cartridge capacity, making it compatible with most whole-house and well water filtration systems. It is effective for municipal and well water applications where chlorine taste and odor, organic chemicals, and general water taste issues are present. This filter works best as a second or third stage after sediment pre-filtration to protect the carbon bed from premature fouling. The flow-through design and 20-micron post-filter make it suitable for moderate flow rate applications up to 2 GPM in residential and light commercial settings.

🔧 Pro Tip: Always install a 5-micron sediment filter upstream of the GAC-20 to extend carbon life and prevent the granular media from clogging with particulate. Mark your installation date on the filter housing with a grease pencil so you can track the 10,000-gallon service life accurately.
$19.22

Original: $54.91

-65%
Pentek - GAC-20 - 20" x 2.5" Granular Activated Carbon Filter—

$54.91

$19.22

Description

The Pentek GAC-20 is a 20-inch granular activated carbon filter designed for full-contact chlorine and taste reduction in whole-house and well water systems. Its flow-through design with internal expansion pad and 20-micron post-filter ensures maximum carbon contact without channeling or bypass.
SPECIFICATIONS

Pentek GAC-20 Technical Details

Dimensions 20" x 2.5" (2-7/8" OD x 20" length)
Filter Media Granular Activated Carbon (GAC)
Post-Filter 20-micron spun polypropylene
Flow Rate 2 GPM at 16 psi pressure drop
Filter Life Up to 10,000 gallons
Temperature Range 40°F to 145°F
Housing Compatibility Standard 20" x 2.5" filter housings
End Cap Material Polystyrene with polystyrene outer casing
INSTALLATION & USE

Installing Your GAC-20 Filter

  1. Shut off water supply and relieve system pressure by opening a downstream faucet before removing the filter housing sump.
  2. Remove the old cartridge and clean the housing sump with mild soap and water, checking the o-ring for wear or damage.
  3. Insert the Pentek GAC-20 vertically into the housing, ensuring it seats properly on the center post without forcing or tilting.
  4. Lubricate the o-ring with food-grade silicone grease, thread the sump back onto the housing cap, and hand-tighten firmly.
  5. Turn water supply back on slowly and check for leaks, then flush the system for 3-5 minutes to clear carbon fines and activate the filter bed.
COMPATIBILITY

Where the GAC-20 Works Best

The Pentek GAC-20 fits all standard 20-inch filter housings with 2.5-inch diameter cartridge capacity, making it compatible with most whole-house and well water filtration systems. It is effective for municipal and well water applications where chlorine taste and odor, organic chemicals, and general water taste issues are present. This filter works best as a second or third stage after sediment pre-filtration to protect the carbon bed from premature fouling. The flow-through design and 20-micron post-filter make it suitable for moderate flow rate applications up to 2 GPM in residential and light commercial settings.

🔧 Pro Tip: Always install a 5-micron sediment filter upstream of the GAC-20 to extend carbon life and prevent the granular media from clogging with particulate. Mark your installation date on the filter housing with a grease pencil so you can track the 10,000-gallon service life accurately.