Water filters for sale: every type, compared before you buy

Advertised prices, verified

How to shop the listings without overbuying

1. Name the problem before browsing. Bad taste, chlorine smell, cloudy water, staining and a contaminant scare all point to different filters. A test result, or at least your utility's Consumer Confidence Report for city water, tells you what you are filtering before you spend anything on hardware.
2. Pick the smallest scale that solves it. If only drinking water matters, an under-sink or countertop unit does the job for far less than a whole-house system. Buy point-of-entry equipment only when the problem, such as sediment, chlorine or iron, genuinely affects every tap, shower and appliance in the house.
3. Compare inside the category. Once the category is fixed, use the table above to compare list prices, then open the vendor pages and compare what each unit was actually tested to remove, its rated capacity, and the cost of its replacement cartridges, which quietly decides the long-run price.
4. Check the install requirements. Pitchers and faucet units need nothing. Under-sink units want a hole for a dedicated faucet and a drain connection if RO. Whole-house tanks need main-line plumbing and space to service them. Make sure the unit you like physically fits where it has to live before ordering.

The categories on sale, briefly

Pitcher and dispenser filters are the entry point: carbon that improves taste and chlorine at the cost of slow throughput and frequent cartridge buys. Faucet-mount units move that carbon to the tap. Under-sink carbon systems filter faster and hide the hardware, while under-sink reverse osmosis adds a membrane for dissolved contaminants and feeds its own small faucet.

Countertop units, both carbon and RO, suit renters because nothing is plumbed permanently. Whole-house cartridge systems and backwashing tanks treat everything entering the home and are the right shelf for sediment, chlorine and iron. Shower filters and refrigerator cartridges round out the aisle as single-fixture purchases. If hardness is the real complaint, you want a softener instead: see our best water softening systems page.

Reading a sale listing like a skeptic

The number that matters on any listing is not the discount, it is what the filter is certified to reduce and for how many gallons. Vendors publish test standards and capacity on the product page, and a deep discount on a unit tested only for chlorine taste does not make it a lead filter. Match the certification to your actual problem before the price enters the decision.

Also check that replacements for the discounted model are stocked and fairly priced. A cheap system with expensive proprietary cartridges costs more within a couple of years than a dearer system with commodity ones. The table below is list pricing for the systems themselves; treat the cartridge line on each vendor page as the second half of the price tag.

Common questions

Where are water filters actually sold?

Hardware and big-box stores carry pitchers, faucet units and common cartridges. The full range, especially RO and whole-house systems, is sold direct by the vendors listed in the table above.

What is a fair price for a water filter?

It depends entirely on the category: a pitcher and a whole-house tank are different purchases. The table above shows current list prices by type, with a median of $1,531 across the compared systems.

Are the filters sold on marketplaces the same as the vendors' own?

The systems usually are, but replacement cartridges on open marketplaces attract counterfeits. Buying from the vendor or an authorized dealer avoids the problem entirely.

Do sale-priced filters remove PFAS or lead?

Only if the specific model was tested for those claims, which the vendor's product page states. The price of the unit tells you nothing about what it removes.

Browse by system type

• Compare Water softeners on advertised prices
• Compare Salt-free softeners on advertised prices
• Compare Whole-house filters on advertised prices
• Compare Reverse osmosis systems on advertised prices
• Compare Shower filters on advertised prices
• Compare Countertop filters on advertised prices
• Compare Refrigerator filters on advertised prices
• Compare Iron filters on advertised prices