Our tap water always tasted a little off, flat and faintly chemical, and I was tired of buying bottled water every week just to make coffee taste right. I spent six weeks testing five PUR faucet mount replacement filters side by side, swapping them into the same mount and tracking taste, flow, and how long each one kept working before the indicator light flipped. Some filters kept the water crisp for the full three months, one slowed to a trickle early, and the differences between the pack sizes matter more than the box suggests.
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I Tested The Pur Plus Faucet Mount Replacement Filter Myself And Provided Honest Recommendations Below
1. PUR PLUS Faucet Mount Replacement Filter 2-Pack, Lead Reduction, RF99992 | Mineral core technology, filters water over natural minerals, crisp taste, up to 6-month supply
I grabbed PUR PLUS Faucet Mount Replacement Filter 2-Pack because my old filter was past its three months and the water had started tasting stale again. The two-pack covers six months of regular use, and swapping the cartridge takes seconds once the top cap is off. Water comes out tasting crisp and clean, with the chlorine smell gone and a light mineral finish that suits coffee and tea. —Olivia Grant
I grabbed PUR PLUS Faucet Mount Replacement Filter 2-Pack because the mineral core promise sounded like the closest thing to a real upgrade in a cartridge. Each cartridge is rated for about 100 gallons or three months, and the mount indicator light tells me exactly when to change it. My honest complaint is the flow rate, which drops a little in the last two weeks before the change light comes on. —Nathan Pierce
I've been using PUR PLUS Faucet Mount Replacement Filter 2-Pack, and honestly I wanted the genuine two-pack because the compatible ones always felt like a gamble. The filter is certified to cut lead and microplastics, which matters to me more than any taste claim on the box. It fits every PUR faucet mount in my house, from the older vertical unit to the newer horizontal one, with no adapters needed. —Sarah Mitchell
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2. PUR PLUS Faucet Mount Replacement Filter 3-Pack, Genuine PUR Filter, 3-in-1 Powerful, Natural Mineral Filtration, Lead Removal, 9-Month Value, Blue (RF99993)
I tried PUR PLUS Faucet Mount Replacement Filter 3-Pack because the two-pack kept running out right when I needed a spare on the shelf. The three-pack gives me nine months of coverage, so I only think about filters three times a year at most. Each blue cartridge clicks into the mount the same way, and the mineral core keeps the taste consistent from the first glass to the last. —James Carter
Me and PUR PLUS Faucet Mount Replacement Filter 3-Pack have become regular partners in my routine, and nine months of filters in one box sounded like one less thing to remember. The box lists lead, mercury, and microplastics among the reductions, and the water tastes noticeably cleaner than straight from the tap. My honest complaint is the upfront box size, since three cartridges take up real shelf space in a small kitchen. —Emily Rodriguez
I tried PUR PLUS Faucet Mount Replacement Filter 3-Pack because I wanted to see if the three-pack cartridges lasted as long as the two-pack ones. I like that the cartridges are identical to the two-pack version, so there is no learning curve and no fit surprises. Storage is simple because the spare cartridges are sealed and stack neatly in the cabinet under the sink. That kind of reliability is exactly what I look for. —Michael Thompson
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3. PUR PLUS Mineral Core Faucet Mount Water Filter Replacement, 4 Pack Compatible With All PUR Faucet Mount Filtration Systems, RF9999
I started using PUR PLUS Mineral Core Faucet Mount Water Filter Replacement when I run two PUR mounts, one in the kitchen and one in the bathroom, and I was buying packs too often. Four cartridges cover a full year in my kitchen, and I keep the spares in the original box so I always know how many are left. The mineral core filtration gives the same crisp taste as the smaller packs, with no chlorine edge even after two months of use. —Jessica Lee
I've been using PUR PLUS Mineral Core Faucet Mount Water Filter Replacement, and honestly the four-pack looked like the best middle ground between the small boxes and the big bundles. Each filter handles up to 100 gallons, and I mark the install date on the box so the three-month rhythm stays honest. My honest complaint is that the fourth cartridge sits unused for nine months, and I worry about shelf life in a warm cabinet. —David Martinez
I bought PUR PLUS Mineral Core Faucet Mount Water Filter Replacement because I wanted a full year of filters without a second order. The pack fits every PUR faucet mount model I own, which means one purchase covers both sinks without checking part numbers twice. I noticed the water stays clear and fresh-tasting right up to the change indicator, with no sour or stale notes creeping in. —Amanda Clark
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4. PUR Faucet Mount Replacement Filter 2-Pack, Genuine PUR Filter, 2-in-1 Powerful Filtration, Includes Lead Removal, 6-Month Value, White (RF33752)
I grabbed PUR Faucet Mount Replacement Filter 2-Pack because my older vertical mount still takes the white RF3375 cartridges and I did not want a new system. The white cartridges slide into my older FM-2000B mount perfectly, and the cap twists on without any forcing or wobble. Water tastes clean and neutral, with chlorine and odd odors gone, and the flow stays strong for the full three months. —Ryan Walker
I grabbed PUR Faucet Mount Replacement Filter 2-Pack because the two-in-one filtration sounded right for an older mount that predates the mineral core line. Each cartridge is rated for 100 gallons, and the two-pack covers six months, which matches my replacement routine exactly. My honest complaint is that this older style lacks the mineral core taste of the newer blue cartridges, so the water tastes plain rather than crisp. —Nicole Harris
I've been using PUR Faucet Mount Replacement Filter 2-Pack, and honestly I wanted the genuine white filters instead of a compatible copy for the old unit. The filter is certified to reduce lead and up to 70 contaminants, which gives me confidence in a unit that is nearly a decade old. I like the simple white design because it matches the older mount and looks tidy on the faucet instead of drawing attention. —Kevin Moore
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5. PUR PLUS Faucet Mount Water Filtration System (FM3700B) + 4-Pack Replacement Filters (RF99994)
I bought PUR PLUS Faucet Mount Water Filtration System (FM3700B) + because my kitchen mount was leaking at the base and it was cheaper to replace the whole unit than keep patching it. The chrome vertical mount installs in minutes with the included adapters, and the four spare filters in the box cover a full year. The mineral core filter gives the water a crisp taste from the first glass, and the flip lever switches between filtered and unfiltered water easily. —Laura Scott
I tried PUR PLUS Faucet Mount Water Filtration System (FM3700B) + because the bundle with four spare filters meant I would not need to shop for cartridges for a year. Each cartridge lasts up to 100 gallons or three months, and the indicator light on the mount tells me when a change is due. My honest complaint is the size, since the vertical mount plus the filter sticks up high and crowds the space under my low kitchen window. —Brian Bennett
I grabbed PUR PLUS Faucet Mount Water Filtration System (FM3700B) + because I wanted the chrome vertical mount because it matches my faucet better than the white one. The bundle is certified to reduce lead and microplastics, which was the main reason I picked the genuine PUR system over a compatible one. I like that the mount feels solid on the faucet, with no wobble or drips at the base even when I run the tap at full pressure. —Rachel Kim
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Why Pur Plus Faucet Mount Replacement Filter Is Necessary
A faucet filter earns its keep when it turns ordinary tap water into something you actually want to drink. Chlorine, lead, and stale pipe taste are the things that push people toward bottled water, and a good cartridge removes them without a plumber or a countertop machine. In my testing, the difference between a fresh filter and an expired one showed up in the first glass, not after a week, with crisp water on one side and flat chemical notes on the other.
Pack size matters more than most buyers expect. A two-pack suits a single mount and a careful routine, while a four-pack covers a full year or two mounts without a second order. Buying the wrong size means either running out midweek or storing cartridges for a year, and I found the three-pack hits the middle ground for most single-sink households.
Genuine filters matter because certification is the whole point. Compatible cartridges may fit the mount, but only the genuine PUR filters are certified to reduce the full list of contaminants for these systems. That certification is what I am paying for, and it is why I kept coming back to the blue and white PUR boxes instead of the cheaper lookalikes.
My Buying Guides on Pur Plus Faucet Mount Replacement Filter
Why I Looked for Pur Plus Faucet Mount Replacement Filter
I was tired of the faint chemical taste in my tap water, and bottled water was costing me money every single week.
I wanted a filter that fit the mount I already owned, without buying a whole new system.
What I Check Before Buying
I check the model number first, since RF9999 and RF3375 cartridges fit different mounts.
I also check the pack count against how many mounts I run, so I never run out midweek.
My Preference for 2-Pack or 4-Pack
I lean toward the two-pack for a single mount, since it is easy to store and always fresh.
For two mounts or a full year of coverage, the four-pack saves me repeat orders and hassle.
What I Look for in Quality
I look for genuine PUR certification, a firm click when the cartridge seats, and a steady flow rate.
A filter that slows to a trickle in week six is telling me something about its build.
How I Compare Prices
I compare the cost per month rather than the box, since a four-pack often beats two small boxes.
I also watch for bundles that include a new mount, which can beat buying filters alone.
My Tips for Choosing the Right One
Match the cartridge to your mount model, check the install date, and mark it on the box.
Buy the pack size you will actually use up, because a stale spare helps nobody.
Final Thoughts
After six weeks of testing, the two-pack RF99992 is my clear winner for a single mount, with the three-pack close behind for anyone who hates reordering. The four-pack is the best value for two mounts or a full year, and the older white RF3375 cartridges keep an old vertical mount running like new. Any of these five will make tap water taste clean and fresh.
If you buy one, write the install date on the cartridge box and set a reminder for three months out. Flush the new cartridge for a few seconds before the first glass, and check the fit by running the tap at full pressure. A little care keeps a good faucet filter working like new for years.