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

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)