10 x 2.5 Inch Replacement Filters
If you're seeing two 10-inch filter collections on our site, here's the difference: 10 x 2.5 inch cartridges are the standard size for undersink and point-of-use filtration systems — the kind installed under your kitchen sink or at a single faucet. 10 x 4.5 inch cartridges are the larger Big Blue format used in whole house systems. Same length, very different diameter, and not interchangeable.
The 2.5 inch format is also significantly more affordable — cartridges here start at under $3.00, compared to $9 or more for whole house Big Blue cartridges. That lower cost makes it practical to replace filters on schedule rather than stretching them past their service life.
With 109 options, this is our largest cartridge collection. Media types available include:
- Sediment — spun polypropylene and wound string in a range of micron ratings
- Carbon block — for chlorine, taste, and odor reduction
- GAC (granular activated carbon) — for broader chemical reduction
- Specialty media — including fluoride reduction, iron reduction, and arsenic reduction cartridges
All cartridges fit standard 10 x 2.5 inch housings. Not sure what your system takes? Call 1-800-277-3458.
