# Best Faucet Mount Water Filters

# Best Faucet Mount Water Filters: Screw It On, Drink Clean in Five Minutes

**strong** Certified capacity in these records runs from *em* to *em*, certified scope from chlorine and taste alone to lead, particulate Class I and the full 401 list, and cost per gallon from about *em* to about *em*. Two fixtures in the class publish both a flow rate and a working pressure range, and those two are also the only ones certified against all three of the standards worth naming. Every figure below comes from manufacturer documentation or a certification record, held against the claims on the box.

[Faucet Mount Water Filters Specs](#specs)
[Faucet Mount Water Filters Score](#score)
[Faucet Mount Water Filters for You](#who)
[Faucet Mount Water Filters Pros and Cons](#proscons)
[Faucet Mount Water Filters Cost](#cost)
[Faucet Mount Water Filters Compared](#compare)
[Faucet Mount Water Filters FAQ](#faq)
[Faucet Mount Water Filters Verdict](#verdict)

**strong** This article contains affiliate links. **strong** at *em*. **strong** retail prices move daily, so we quote ranges and send you to the live figure on the listing. **strong** *em* Every number on this page traces to manufacturer documentation, an IAPMO, NSF or WQA certification record, or a published performance data sheet, held against the claims on the box. No free products, no paid placements, no manufacturer relationships. Scoring rules are public on our [methodology page](/methodology).

[](https://www.amazon.com/dp/B082THPM2H?tag=waterfilternerd-20&linkCode=ogi&th=1&psc=1)

## Best Faucet Mount Water Filters: What the Class Publishes

**strong** Eight products sit in our records, all carbon or carbon with a little ion exchange, all in bands between about $17 and about $45, and every one of them screws onto the aerator thread where the little screen at the tip of your spout came off. The housing is a diverter, a lever and a bracket. The cartridge is the water.

Two numbers decide the purchase and neither is printed on the front of the box: the standard set the cartridge is certified against, and the gallons it is rated for. Two fixtures in these records publish a flow rate as well, *em*.

The whole class sits in our [best water filters hub](/best-water-filters), and here is what the documents actually say.

- Certified scope: the standard set a filter holds. NSF/ANSI 42 covers chlorine, taste and odor, which is a comfort claim. NSF/ANSI 53 is the health list, lead, chromium, mercury and named PFAS compounds, certified per listing. NSF/ANSI 401 covers emerging compounds. NSF/ANSI 372 is a materials standard about lead in the plumbing, and it says nothing about the water.

- Rated capacity: 100 gallons at the bottom of these records and 350 gallons at the top, in the same aisle at bands about $10 apart. That is a three and a half fold spread in how often you rebuy the only part that wears out.

- Published flow rate: the honest documents print one. Brita states 0.58 gpm, about 74 ounces a minute, and PUR states 0.52 gpm, about 67. The 320 gallon cartridge publishes no rate, and neither does most of the class.

- Working pressure: a faucet mount hangs downstream of the whole city main, so the document that matters names a range. Brita prints 20 to 100 psig and a test point of 60 psig. Nothing else in these records prints either figure.

- Compatibility: every fixture here hangs off a standard aerator thread and ships with adapters for the other sizes, with a twist of the fingers rather than a tool. That is the entire practical advantage over the under sink class.

- Upfront band: our records run from $17 to $21 for Waterdrop's FC-01 body to $40 to $45 for the Brita system, with that same Brita system in a two cartridge chrome kit at $32 to $37. Bands, not live figures.

- Not published anywhere in this class: a certificate or listing number a reader can key into a registry, and for most of the aisle a cartridge price set against a certified capacity. Rebuilding that column by hand is the work every buyer in this aisle takes on.

**strong** *em*

**strong**

Think of it this way

Gravity does the work in the pitcher aisle. A faucet mount gets **strong** of city pressure behind it, which is why the honest document for one of these filters spends its effort slowing the water down instead of pushing it through: *em*. The same carbon that needs about 12 minutes to fill an 80 ounce jug tank puts those 80 ounces through a spout in about 65 seconds. *em*

Certified gallons per cartridge across four faucet mounts
Bar chart of rated cartridge capacity: the WINGSOL WS-FM002 is rated 350 gallons, the Waterdrop FC-01 320 gallons, the Culligan CULFMWH 200 gallons, and the Brita faucet system 100 gallons.
Gallons per cartridge, four faucet mounts
The same aisle holds a three and a half fold spread in rated capacity

- 0 100 200 300 400 gal WINGSOL WS-FM002 Waterdrop FC-01 Culligan CULFMWH Brita faucet system 350 gal 320 gal 200 gal 100 gal, the pick Rated capacity from manufacturer documentation and certification records, our records as of the last check. Rated capacity for four of the eight fixtures in our records. The navy bar is the pick on this page, and it is the shortest one: the body with the most documentation carries the smallest cartridge. The two longest lives here sit in bands about $10 apart from it, which is what changes how often you go shopping. See the Full Spec Sheet on Amazon ## Faucet Mount Water Filters Score: 6 of 7 for the Top Pick Every product in this index is rated 1 to 7 across seven verifiable criteria. One point per criterion. No partial credit. A roundup still needs a subject, so the scorecard below belongs to the fixture that takes the top spot in this class, copied from that product's own review rather than rescored here. The rule set is the published scoring rules in one page: 7 lines, one point each, and every line asks the same two questions. Is the number on the record, and does it hold up against the rest of the class. The line stays at zero when the document is missing or the figure is the worst in its class. Six of the 7 points land here, and the single zero is a missing sentence rather than a missing capability. Criterion Points Evidence Certified removal scope1 pointThree standards in one WQA certification, with chlorine, particulate Class I and lead carrying published percentages Certification and test transparency0 pointsThe sheet publishes the standards, the capacity, the flow rate and the pressure range, and no certificate or listing number Filter life and rated capacity1 point100 gallons and 378 liters, which is the figure the certification is written against Cost per gallon1 pointAbout 15 to 18 cents on Brita's own cartridge prices, at the cheap end of the class, against 13 to 15 cents for the PUR cartridge in our records Flow rate and pressure drop1 point0.58 gpm and 20 to 100 psig both published, about 6.5 seconds for an 8 ounce glass Install and footprint1 pointNo tools, no plumbing, one twist on a standard spout, and no counter or cabinet space given up Maintenance burden1 pointAbout 3 cartridges a year at Brita's own household volume, a twist and no soak, with an indicator that resets itself One line sits at zero, and it is the certificate number nobody prints. This system publishes more about itself than anything else in the aisle: the three standards, the capacity in two units, the flow rate, the working range, the test pressure, and a percentage beside every substance on the list. What it never publishes is a number a reader can key into a registry. NI-66997 is the code in the foot of the sheet, and it names the document rather than the certification. The flow line is the other half of that story. 0.58 gpm and a stated working range are both on the sheet, in a paragraph most storefronts never link, and that pair is the reason this fixture stands alone at the top of the class with 6 of the 7 points. Compare the Faucet Mount That Publishes Its Numbers ## Best Faucet Mount Water Filters for Your Tap The question is never which fixture is best. It is which cartridge matches the contaminant you can name, the gallons your household drinks, and the spout you already own. The class splits into two piles, and the aisle does not label them. Pick your side, then check the arithmetic. If the gallon price is what decides it, the pitcher class runs cheaper per glass and much slower per minute. The renter: nothing in this class touches a pipe, a cabinet or a counter, and every fixture here unscrews and leaves with you. Renters and apartment kitchens get the same answer from this aisle.

- The lead worrier: ask for NSF/ANSI 53 by name. Two products in these records hold it with a printed reduction percentage, and the Brita sheet puts lead at 99.9 percent at both pH values it reports.

- The cheapest gallon: Waterdrop's 320 gallon body runs at under 5 cents a gallon, roughly a quarter of what the certified pair costs, and it names no standard of any kind. That is the trade, stated plainly.

- The cook: a 0.58 gpm spout fills an 8 quart stock pot in about three and a half minutes, against roughly 39 minutes of tank refills for the same 256 ounces through a jug.

- The two glass a day drinker: a 100 gallon cartridge is 1,600 eight ounce glasses, which is more than two years at that pace, and the 4 month clock will retire it long before the capacity runs out.

#### This Is Not Your Faucet Mount If

- You need more than about a gallon a day from one tap and you hate waiting. A gallon takes about a minute and 40 seconds of holding a vessel, and that is a chore with a lever on it.

- You want a listing number to look up before you buy. Not one product in this class prints one, and every page in our index fails that criterion the same way.

- You have hard water and what you actually want is the scale gone. Carbon does not soften anything, and the cartridge retires early when the water is working against it.

- You want the shower and the laundry included. A faucet mount filters one cold spout, which is the tap you drink from rather than the one you bathe in.

The way I see it

The test a faucet mount passes and a pitcher fails is not the glass, it is the pot. **strong**, which is *em* and about 39 minutes of gravity, or about three and a half minutes at a spout running 0.58 gpm. *em*

[See the Brita Faucet Mount on Amazon](https://www.amazon.com/dp/B082THPM2H?tag=waterfilternerd-20&linkCode=ogi&th=1&psc=1)

## Faucet Mount Water Filters Pros and Cons

#### What You Get

- A certified 0.58 gpm on one fixture and 0.52 gpm on another, both with a published working range and a stated test pressure.

- 100 gallons to 350 gallons a cartridge across the class, so the annual change count is a shopping decision rather than a lottery.

- Lead at 99.9 percent on the Brita sheet, at pH 6.5 and pH 8.5, with chlorine at 99.0 percent and particulate Class I at 99.9 percent.

- Three standards on one listing in two products, 42, 53 and 401, which is the widest certified scope we have on a faucet mount.

- No tools, no plumbing, no counter space, and a housing smaller than a coffee mug on the spout.

- One body in the class draws the cheapest gallon in the aisle at about 4 cents.

#### What It Costs You

- 15 to 18 cents a gallon on the top pick's own cartridge, against 13 to 15 cents for the PUR cartridge in our records.

- No cartridge band at all in our records for the Culligan and WINGSOL bodies, so the two longest rated lives are also the two running costs nobody can compare.

- A 5 minute flush at every change, about 3 gallons, and the 100 gallon clock starts after it rather than before.

- A 4 month calendar on the certified pair, which puts 3 changes a year under a household that barely drinks the stuff.

- A 3 month clock on the 320 gallon body, able to retire a cartridge at about 90 of its 320 gallons.

- No softening and no dissolved solids removal. Carbon takes chlorine, taste and the named health contaminants, and leaves the minerals exactly where they were.

[See the Faucet Mount With 320 Gallons in It](https://www.amazon.com/dp/B01GABXWCK?tag=waterfilternerd-20&linkCode=ogi&th=1&psc=1)

## Best Faucet Mount Water Filters: What the Gallon Costs

**strong** Divide a cartridge band by the gallons it is certified for and *em*, from about 4 cents to about 18. That is where the [cartridge comparison](/best-replacement-cartridges) does its work.

- The cheap end: a Waterdrop FC-01 cartridge banded near $11 to $14 against a 320 gallon rating lands at about 4 cents a gallon, the lowest figure we can document on a faucet mount.

- The PUR cartridge: the RF-9999 in a two pack banded $27 to $30 is about $14 a cartridge, which works out at 13 to 15 cents against its 100 gallon rating.

- The pick's cartridge: the Brita FR-200 two pack banded $28 to $32 is about $15 a cartridge, so about 15 cents against 100 gallons. Bought singly in a $17 to $19 band the same gallon reads 18 cents, which is the argument for buying the pair.

- The end we cannot price: the Culligan and WINGSOL bodies carry no cartridge band in our records, leaving the 200 gallon and 350 gallon ratings as the two unknowns in the table. Long capacity and no number to divide it by.

- The annual reality: a household drawing a gallon of drinking water a day passes about 365 gallons a year. At 4 cents that is roughly $15 of cartridges. At 18 cents it is roughly $66, and the fixture that cost the least has become the dearest to run.

- The floor under the arithmetic: the certified pair also carries a 4 month clock, so 3 cartridges arrive every year whether your household pours 100 gallons or 300. The calendar, not the tap, sets that bill.

*em* **strong** A system in the $40 to $45 band with 3 cartridges behind it has spent about $45 on the part you throw away in year one alone, which is the whole purchase price again. *em*

Think of it this way

Five years at a gallon a day is about 1,825 gallons, which is **strong** on a 100 gallon rating, about **strong**, and roughly **strong** paid to draw water through a fixture that cost under $50 once. Eleven pounds is a bowling ball. *em*

Cents per gallon of faucet mount cartridges, three compared
Bar chart of cost per gallon: the Waterdrop FC-01 cartridge is about 4 cents, the PUR RF-9999 cartridge about 14 cents, and the Brita FR-200 cartridge about 16 cents.
Running cost in cents, per gallon
Cartridge band divided by certified capacity, three fixtures

- 0 6c 12c 18c 24c Waterdrop FC-01 cartridge PUR RF-9999 cartridge Brita FR-200 cartridge about 4c about 14c about 16c, the pick Cartridge bands divided by certified capacity, from our records as of the last check. Prices move, bands are indicative. Cost per gallon for three cartridges this class actually buys. The navy bar is the pick on this page. The 4 cent gallon belongs to the body with no standard on its sheet, and the 16 cent gallon belongs to the fixture that prints a pressure range, so about $45 a year at a gallon a day is partly the price of a document. See the Two Pack That Beats the Single Cartridge About $14 a cartridge in the pair against about $18 bought singly, on the same 100 gallon rating. ## Faucet Mount Water Filters Compared: The Class in One Table Every row below is a fixture from our own index, with certifications and capacity taken from our records rather than from a manufacturer comparison chart. The upfront figures are bands, and the points column is the Nerd Stamp™ each product earned on its own review. Faucet mount Certified Rated life Upfront band Points Brita Faucet Mount System42, 53, 401100 gal$40 to $456/7 Waterdrop FC-01no standard named320 gal$17 to $214/7 PUR PFM350V42, 53, 401100 gal$30 to $354/7 Culligan CULFMWH42, 53200 gal$28 to $32see the review WINGSOL WS-FM00242, 53350 gal$30 to $35see the review Waterdrop FC-06no standard namednot published$28 to $32see the review Three things fall out of that table. The widest standard set and the longest rated life belong to two different fixtures, and the twist is that the longest life sits on a body with the thinnest paperwork. The Brita lineup holds the certification, the Waterdrop lineup holds the cheap gallon, and the PUR lineup splits the difference with three standards on 100 gallons. The Brita faucet mount review, the PUR PFM350V review and the Waterdrop FC-01 review carry their own figures in full. The second surprise is the price direction. The 200 gallon and 350 gallon ratings sit in bands that undercut the certified pair, and neither one prints a flow rate or a cartridge price our records can find. A reader comparing those two columns is buying capacity and taking the rest on faith. Capacity is cheap in this aisle. Documentation is the expensive part. See the Two Cartridge Kit for Less The same system and the same FR-200 cartridge, with one spare in the box and a lower band. ## Faucet Mount Water Filters FAQ What is the best faucet mount water filter in your records? By the two axes we publish, Brita's faucet system takes the top spot at 6/7 points: a WQA certification against standards 42, 53 and 401, a published 0.58 gpm inside a rated pressure range, a cartridge rated at 100 gallons and about 15 to 18 cents. Waterdrop's FC-01 is the cheapest gallon we can document at about 4 cents, on a fixture that names no standard. Which of the two is better depends on whether you are shopping for a certification or for gallons. How much does a faucet mount filter cost per gallon? In our records the class runs from about 4 cents to about 18, and the spread sits entirely in the cartridge. Divide a cartridge band by the certified capacity and the figure appears: a two pack at about $15 a cartridge against 100 gallons lands near 15 cents, the same cartridge bought singly lands near 18, and an $11 to $14 cartridge on a 320 gallon rating lands near 4. Two of the longest rated lives in the class have no cartridge band in our records at all. Do faucet mount filters remove lead? Some do, and the ones that do say so with a standard number rather than an adjective. NSF/ANSI 53 covers lead, chromium and mercury, and the Brita sheet puts lead reduction at 99.9 percent at both pH values it reports. Standard 42 on its own covers chlorine, taste and odor and says nothing about lead. If lead is the concern, find 53 on the data sheet before you look at the band on the listing. Will a faucet mount fit my sink? Every fixture in our records screws onto a standard aerator thread and ships with adapters for the other sizes, so the answer is yes for most kitchen spouts and no for a pull down spray head with a proprietary tip. The free check takes a minute: unscrew the little screen at the tip of your spout by hand. If it comes off, this class fits. If it will not budge, the mount has nothing to attach to. How long does a faucet cartridge last? Two limits apply and the earlier one wins. A 100 gallon cartridge is 1,600 eight ounce glasses, which is about two years at two glasses a day, and it also carries a 4 month clock that retires it at about a quarter of that. The 320 gallon body has the opposite problem, since its 3 month clock can end it at about 90 gallons. Whichever limit arrives first is the honest life of the cartridge. ## Best Faucet Mount Water Filters: Where the Class Lands Eight fixtures, two real candidates, and one column that decides between them. Brita's faucet system earns 6/7 for a WQA listing that covers 42, 53 and 401, a published 0.58 gpm with a rated pressure window, and a 100 gallon rating at about 15 to 18 cents. Waterdrop's 320 gallon fixture takes the running cost at about 4 cents and documents almost nothing about what it removes. It is the cheapest water in this aisle, and the one whose claims a reader has to take on faith. Start with the contaminant you can name, then let the cartridge price per gallon pick between the finalists. If the answer is chlorine and taste, the 4 cent gallon does that job for roughly a quarter of the money, and the certified pair is selling you a document rather than a different glass of water. Six points for the fixture that prints its numbers, four for the two that print less, and not a single listing number in the whole aisle. See the Faucet Mount That Took the Top Spot ### Where It Lands: The Certified Fixture, 6/7 The Brita faucet system takes the certification, the flow rate and the pressure range at 6/7 points. Waterdrop's long life body takes the running cost at about a quarter of the money. Name the contaminant first, then take the cheaper of the two finalists that covers it. Check the Price on the Brita Faucet Mount ## Faucet Mount Water Filters Lexicon: Every Standard Here NSF/ANSI 42 The aesthetic effects standard. Covers chlorine, taste and odor. Every fixture in these records holds it, and holding it alone means the filter improves how water tastes and nothing else. NSF/ANSI 53 The health effects standard, certified per listing. Covers lead, chromium, mercury, asbestos, benzene and named PFAS compounds depending on the listing. When a page claims lead removal without this standard named, the claim is marketing. NSF/ANSI 401 Covers emerging compounds, certain pharmaceuticals, pesticides and flame retardants. It is a separate listing from the PFAS coverage people assume it includes. NSF/ANSI 372 A materials standard about lead content in the plumbing and the housing, not about the water. It is common on filters that hold no health standard at all, and it reads better on a box than it is. Rated capacity The gallons a cartridge is certified to filter before performance is no longer covered, printed in gallons. It is the honest way to compare running cost, because months depend on how much a household drinks rather than on the rating. Change interval The calendar limit on a cartridge, in months, printed whether or not you used the capacity. A 4 month clock under a 100 gallon cartridge puts three changes a year under every household in this class, heavy drinker or not. Service flow rate Gallons per minute through the cartridge. 0.58 gpm is about 74 ounces a minute, which is 6.5 seconds for an 8 ounce glass and about a minute and 40 seconds for a gallon. Working pressure The psig range a housing is rated to sit inside, 20 to 100 psig on the two documents that print one. It matters because a faucet mount hangs downstream of the whole city main, and an unrated housing is an unstated risk. ## Keep Reading: Faucet Mount Water Filters and Brand Pages Best Water Filters: the parent hub, every category in the index ranked by Nerd Stamp and cost per gallon.

- Brita Water Filters Review: the whole lineup, pitchers to faucet mounts, spec by spec.

- Best Pitcher Water Filters: what you buy when the fridge shelf matters more than the cents per gallon.

- The Nerd Stamp Methodology: how the 1 to 7 rating is calculated.