The American Plumber WRC25HD20 is a 25 micron heavy-duty carbon-wrapped whole house filter cartridge. It measures 20" x 4.5" (Big Blue size) and has a rated service life of approximately 30,000 gallons or up to 6 months, depending on your household water usage and incoming water quality. Its large capacity makes it ideal for point-of-entry whole house filtration systems.

The WRC25HD20 uses a high-performance carbon-impregnated cellulose media to reduce chlorine taste and odor, sediment, dirt, rust, sand, and silt from your entire home's water supply. The dual-action design combines sediment filtration with carbon filtration in a single cartridge, delivering cleaner, better-tasting water from every tap, shower, and appliance in your home.

The WRC25HD20 is designed to fit any standard 20" x 4.5" Big Blue whole house filter housing. It is compatible with American Plumber W20-BC and W20-PR housings, as well as other major brand Big Blue-sized housings. Always verify your housing dimensions (20" length and 4.5" diameter) before installation to ensure proper fitment and sealing.

American Plumber recommends replacing the WRC25HD20 every 3 to 6 months or after 30,000 gallons, whichever comes first. Homes with high sediment levels, well water, or heavy daily usage may require more frequent replacement. A noticeable drop in water pressure or return of chlorine taste/odor is a clear indicator that it's time to install a new cartridge.

The American Plumber WRC25HD20 supports a maximum flow rate of up to 8 gallons per minute (GPM), making it suitable for whole-home applications. It operates within a temperature range of 40°F to 100°F and a pressure range of 30 to 125 psi. For optimal performance, install the cartridge in a properly sized Big Blue housing and flush for 5–10 minutes after installation to remove any carbon fines.