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home > Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS /PL/CTO/ GAC > Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS /PL/CTO/ GAC
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Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS /PL/CTO/ GACWhat it is Slimline 2. 5" 20" (5 m) cartridges for point of entry (small homes lines) or point of use polishing. Pair with a standard 2. 5" 20" housing. Not for Big Blue (4. 5" diameter) housings. What it does Protects downstream systems (UV, softener descaler, RO, heaters, fixtures) by capturing fines and or improving taste & odor. Municipal water: pair carbon (CTO GAC) for chlorine & T&O; use sediment ahead of carbon. Well water: stage sediment
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What it is

Slimline 2.5" × 20" (5 µm) cartridges for point-of-entry (small homes/lines) or point-of-use polishing. Pair with a standard 2.5" × 20" housing.
Not for Big Blue (4.5" diameter) housings.

 

What it does

  • Protects downstream systems (UV, softener/descaler, RO, heaters, fixtures) by capturing fines and/or improving taste & odor.

  • Municipal water: pair carbon (CTO/GAC) for chlorine & T&O; use sediment ahead of carbon.

  • Well water: stage sediment → carbon to reduce turbidity before UV/primary treatment.

Compatibility
Fits any standard slimline 2.5" × 20" housing at POE or POU. Works as a pre-filter before UV and undersink RO.

 

Variants 

PP Melt-Blown Sediment — 5 µm

Use: Everyday depth filtration; high dirt-holding.

  • Best for: General sediment (sand/silt/rust).

  • Replacement: 4–9 months, sooner if pressure drop rises 10–15 psi or water turns cloudy.

PS Spun Sediment — 5 µm

  • Use: Spun depth media with graded density; handles variable loads.

  • Best for: Seasonal/turbidity swings.

  • Replacement: 4–9 months (same triggers as above).

PL Pleated Sediment — 5 µm

  • Use: High surface area; low pressure drop; can be lightly rinsed to restore flow.

  • Best for: Higher flow / lower inlet pressure.

  • Replacement: 6–12 months (rinse as needed; no soaps/solvents).

CTO Carbon Block — 5 µm

  • Use: Taste & odor, chlorine reduction; some blocks also address chloramine.

  • Best for: Municipal water polishing.

  • Placement: After a sediment stage.

  • Replacement: 6–12 months or when taste/odor returns.

GAC Granular Carbon — 5 µm

  • Use: Taste & odor improvement; chlorine reduction; good contact time in tall housings.

  • Best for: Municipal water with chlorine/organic aftertaste.

  • Placement: After a sediment stage.

  • Replacement: 6–9 months or sooner if flavor changes.

 

Notes & safety

  • Replace sooner with dirty/colored water, taste/odor return, or +10–15 psi pressure drop.

  • Carbon cartridges do not disinfect; for microbiological risks use UV (with proper pre-filtration).

  • Dimensions are nominal; follow your housing’s O-ring and rating guidelines.

Specs

  • Size: 2.5" × 20" (slimline) · Rating: 5 µm (nominal) · Media: PP / PS / PL / CTO / GAC

  • In the box: 1× Cartridge (housing sold separately)

Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS /PL/CTO/ GAC

Item no : 30909598203
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US$ 19.99
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Min. order: 1piece

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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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