Quick Answer: For most Keurig owners who already have the in-tank filter handle, the Keurig 6-Pack Water Filter Cartridge Refills (about $12.19 for six, roughly $2 per filter) are the best overall pick — official OEM charcoal cartridges sized to snap straight into the stock handle. Want the same filtration for less? A 12-pack of compatible cartridges that replace Keurig part #05073 runs about $12.99 for twelve, closer to $1 each. No handle yet? The Tall Handle Water Filter Starter Kit (about $14.99) bundles a reusable handle with two cartridges. And if hard water and scale — not just chlorine taste — are the real concern, filtering water in a ZeroWater 6-Cup Pitcher (about $25-30) before pouring it into the reservoir beats any in-tank charcoal cartridge.
A Keurig’s in-tank filter is small on purpose — it’s a charcoal cartridge that clips into a plastic handle sized to fit inside the water reservoir, not a full countertop filtration system. Keurig’s own product guidance recommends replacing that cartridge every 2 months or after 60 tank refills, whichever comes first, to keep chlorine taste out of your coffee. One thing Keurig is explicit about: never use pure distilled water, regardless of whether a filter cartridge is installed — it lacks the minerals the machine’s internal sensors need to register water level, and often triggers a false “Add Water” light on a full tank. Below we compare the official cartridge, a cheaper compatible option, the starter kit for first-time setup, and a pitcher-based alternative for anyone dealing with genuinely hard water. If you’re filtering coffee water for taste and mineral balance more broadly, see our best water filter for coffee guide instead.
Keurig water filtering, by the numbers
- Keurig’s own product documentation instructs replacing the in-tank water filter cartridge every 2 months or after 60 tank refills, whichever comes first — the baseline maintenance interval for both OEM and compatible cartridges.
- Keurig explicitly warns against using pure distilled water, even with a filter installed, because it lacks the dissolved minerals the brewer’s internal sensors rely on to detect the reservoir’s water level — a documented cause of false “Add Water” errors on a full tank.
Best Keurig water filters at a glance
| Product | Best for | Format | Replace every | Price |
|---|---|---|---|---|
| Keurig 6-Pack Cartridge Refills | Best overall (OEM) | Charcoal, fits stock handle | 2 mo / 60 refills | ~$12.19/6-pack |
| Compatible 12-Pack (replaces #05073) | Best value | Charcoal, fits stock handle | 2 mo / 60 refills | ~$12.99/12-pack |
| Tall Handle Starter Kit | Best for first-time setup | Handle + 2 cartridges | Handle reusable / cartridges 2 mo | ~$14.99 |
| ZeroWater 6-Cup Pitcher | Best for hard water/scale | Fill-and-pour pitcher, ion exchange | ~15-20 gal/filter | ~$25-30 |
1. Keurig 6-Pack Water Filter Cartridge Refills — Best Overall
Keurig 6-Pack Water Filter Cartridge Refills
These are Keurig's own official cartridges, made to snap into the stock filter handle that ships inside the reservoir on most K-Classic, K-Supreme, K-Elite, K-Select, and K-Slim models. They use a charcoal media to reduce chlorine and other taste-affecting impurities, and Keurig's own guidance is to swap one in every 2 months or after 60 tank refills, whichever comes first. If you already have the handle and just need refills, this is the safest fit-and-forget option.
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At roughly $2 per cartridge, six covers a full year of on-schedule replacements for most single-person households.
2. Compatible 12-Pack Cartridges (Replaces Part #05073) — Best Value
Compatible Keurig Water Filter Cartridges, 12-Pack
These third-party cartridges are built to the same dimensions as Keurig's own part #05073, so they drop into the identical stock filter handle with no adapter needed. Media and replacement interval match the OEM cartridge — the difference is almost entirely price: about $1.08 per filter versus roughly $2 for the official version, which adds up over a two-year ownership window.
Check price on Amazon →Buying a year-plus supply in one 12-pack also means fewer reorder trips if you tend to forget the 2-month replacement window.
3. Tall Handle Water Filter Starter Kit — Best for First-Time Setup
Keurig Tall Handle Water Filter Starter Kit
If your Keurig didn't come with a filter handle, or you've lost the original, this kit bundles the reusable tall handle (for reservoirs taller than about 8") with a 2-month supply of cartridges. The handle itself doesn't wear out — once you have it, every future purchase can be a plain cartridge refill or compatible-cartridge pack instead of a full kit. A short-handle version exists for reservoirs under 8" tall, so check your machine's tank height before ordering.
Check price on Amazon →4. ZeroWater 6-Cup Pitcher — Best for Hard Water & Scale Prevention
ZeroWater 6-Cup Pitcher
The in-tank charcoal cartridges above reduce chlorine taste but do nothing about dissolved hardness minerals, which are what actually build up as scale inside a Keurig over time. Filtering water through a ZeroWater pitcher first — rated to bring total dissolved solids down toward 0 ppm — strips those minerals before the water ever reaches the reservoir, which is the better fix if scale and frequent descaling are your real problem rather than taste. One caveat: because it filters so aggressively, some Keurig owners report the same false "Add Water" sensor behavior Keurig warns about with distilled water. If that happens on a full tank, switch to a basic carbon-filtered or bottled spring water instead.
Check price on Amazon →For the full ZeroWater lineup and certifications, see our dedicated ZeroWater review.
How to choose
- Already have the filter handle? Just buy cartridges — the OEM 6-pack if you want the safest fit, or the compatible 12-pack if you’d rather pay about half as much per filter for the same charcoal media.
- New machine or lost handle? Start with the Tall (or Short) Handle Starter Kit so you have the reusable hardware, then switch to cheaper cartridge refills going forward.
- Fighting scale, not just taste? An in-tank charcoal cartridge won’t touch hardness minerals. Pre-filter with a ZeroWater-style pitcher, or better yet address hardness at the source with a water softener.
- Never pour in pure distilled water. Keurig’s own guidance is explicit on this — it can trigger false “Add Water” errors and strips out the minerals that carry flavor into the cup.
The bottom line
For most Keurig owners, the 6-Pack OEM Cartridge Refills are the simplest, safest pick — swap one in every 2 months and you’re done. If price matters more than brand, the compatible 12-pack does the same job for about half the per-filter cost. Setting up a machine for the first time means starting with the Tall Handle Starter Kit. And if hard water scale — not just chlorine taste — is the actual complaint, filtering with a ZeroWater pitcher before it reaches the reservoir beats any in-tank cartridge, official or not.
Prices are approximate and change often — tap any button above to check the current Amazon price.