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Pentek - S1 - 10" x 2.5" Pleated Cellulose Sediment 20 Micron Filter

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Pentek - S1 - 10" x 2.5" Pleated Cellulose Sediment 20 Micron Filter

The Pentek S1 (155001-43) delivers reliable 20-micron sediment filtration in a pleated cellulose design built for whole-house and RO pre-filtration applications. Its unitized end cap construction and sonic-welded overlap seam minimize bypass and ensure consistent performance across residential and light commercial installations.
SPECIFICATIONS

Pentek S1 Filter Technical Details

Model Number Pentek 155001-43
Dimensions 10" x 2.5" (9-7/8" x 2-1/2" actual)
Micron Rating 20 micron (nominal)
Filter Media Resin-impregnated pleated cellulose
Core & End Caps Polypropylene core, vinyl plastisol caps
Temperature Rating 40°F to 145°F (4.4°C to 62.8°C)
Pressure Drop 2.4 psi @ 10 GPM
Outer Netting Polyethylene, sonic-welded seam
INSTALLATION & USE

Installing Your Pentek S1 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 interior with a mild bleach solution, rinsing thoroughly to remove any sediment buildup.
  3. Insert the Pentek S1 filter into the housing, ensuring the cartridge seats properly on the center standpipe and against the housing cap.
  4. Lubricate the housing o-ring with food-grade silicone grease, hand-tighten the sump, and slowly turn water back on to check for leaks.
  5. Flush the system for 3-5 minutes to purge air and any loose cellulose fibers from the new cartridge before normal use.
COMPATIBILITY

Where the S1 Fits

This 10" x 2.5" filter fits all standard 10-inch filter housings with 2.5-inch diameter capacity, including Pentek, Hydronix, and most major brands. It works as a sediment pre-filter for reverse osmosis systems, whole-house filtration setups, and light commercial applications where dirt, rust, and particulate reduction down to 20 microns is required. The pleated design offers greater surface area and longer service life compared to spun or wound sediment cartridges of the same micron rating.

🔧 Pro Tip: The cellulose media in the S1 is not chlorine-resistant for extended periods. If you're on chlorinated municipal water, consider rotating filters every 3-6 months or pairing with a carbon block downstream to extend system life and protect sensitive equipment like RO membranes.
The Pentek S1 (155001-43) delivers reliable 20-micron sediment filtration in a pleated cellulose design built for whole-house and RO pre-filtration applications. Its unitized end cap construction and sonic-welded overlap seam minimize bypass and ensure consistent performance across residential and light commercial installations.
SPECIFICATIONS

Pentek S1 Filter Technical Details

Model Number Pentek 155001-43
Dimensions 10" x 2.5" (9-7/8" x 2-1/2" actual)
Micron Rating 20 micron (nominal)
Filter Media Resin-impregnated pleated cellulose
Core & End Caps Polypropylene core, vinyl plastisol caps
Temperature Rating 40°F to 145°F (4.4°C to 62.8°C)
Pressure Drop 2.4 psi @ 10 GPM
Outer Netting Polyethylene, sonic-welded seam
INSTALLATION & USE

Installing Your Pentek S1 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 interior with a mild bleach solution, rinsing thoroughly to remove any sediment buildup.
  3. Insert the Pentek S1 filter into the housing, ensuring the cartridge seats properly on the center standpipe and against the housing cap.
  4. Lubricate the housing o-ring with food-grade silicone grease, hand-tighten the sump, and slowly turn water back on to check for leaks.
  5. Flush the system for 3-5 minutes to purge air and any loose cellulose fibers from the new cartridge before normal use.
COMPATIBILITY

Where the S1 Fits

This 10" x 2.5" filter fits all standard 10-inch filter housings with 2.5-inch diameter capacity, including Pentek, Hydronix, and most major brands. It works as a sediment pre-filter for reverse osmosis systems, whole-house filtration setups, and light commercial applications where dirt, rust, and particulate reduction down to 20 microns is required. The pleated design offers greater surface area and longer service life compared to spun or wound sediment cartridges of the same micron rating.

🔧 Pro Tip: The cellulose media in the S1 is not chlorine-resistant for extended periods. If you're on chlorinated municipal water, consider rotating filters every 3-6 months or pairing with a carbon block downstream to extend system life and protect sensitive equipment like RO membranes.
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From $3.22

Original: $9.21

-65%
Pentek - S1 - 10" x 2.5" Pleated Cellulose Sediment 20 Micron Filter

$9.21

$3.22

Description

The Pentek S1 (155001-43) delivers reliable 20-micron sediment filtration in a pleated cellulose design built for whole-house and RO pre-filtration applications. Its unitized end cap construction and sonic-welded overlap seam minimize bypass and ensure consistent performance across residential and light commercial installations.
SPECIFICATIONS

Pentek S1 Filter Technical Details

Model Number Pentek 155001-43
Dimensions 10" x 2.5" (9-7/8" x 2-1/2" actual)
Micron Rating 20 micron (nominal)
Filter Media Resin-impregnated pleated cellulose
Core & End Caps Polypropylene core, vinyl plastisol caps
Temperature Rating 40°F to 145°F (4.4°C to 62.8°C)
Pressure Drop 2.4 psi @ 10 GPM
Outer Netting Polyethylene, sonic-welded seam
INSTALLATION & USE

Installing Your Pentek S1 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 interior with a mild bleach solution, rinsing thoroughly to remove any sediment buildup.
  3. Insert the Pentek S1 filter into the housing, ensuring the cartridge seats properly on the center standpipe and against the housing cap.
  4. Lubricate the housing o-ring with food-grade silicone grease, hand-tighten the sump, and slowly turn water back on to check for leaks.
  5. Flush the system for 3-5 minutes to purge air and any loose cellulose fibers from the new cartridge before normal use.
COMPATIBILITY

Where the S1 Fits

This 10" x 2.5" filter fits all standard 10-inch filter housings with 2.5-inch diameter capacity, including Pentek, Hydronix, and most major brands. It works as a sediment pre-filter for reverse osmosis systems, whole-house filtration setups, and light commercial applications where dirt, rust, and particulate reduction down to 20 microns is required. The pleated design offers greater surface area and longer service life compared to spun or wound sediment cartridges of the same micron rating.

🔧 Pro Tip: The cellulose media in the S1 is not chlorine-resistant for extended periods. If you're on chlorinated municipal water, consider rotating filters every 3-6 months or pairing with a carbon block downstream to extend system life and protect sensitive equipment like RO membranes.
Pentek - S1 - 10" x 2.5" Pleated Cellulose Sediment 20 Micron Filter | Isopure Water