To identify the best gravity water filter, I tested 15 water filters using our seven-step methodology and teaming up with our in-house water filtration expert, James Layton.
Our #1 recommendation, the Santevia Gravity Water System, took home the prize for the best overall gravity water filter due to its exceptional filtration. If you’re looking for a filter for a large group, though, you might prefer the Crown Berkey. When you need something portable for your next camping trip, go with the MSR Gravity Flow.
Best Overall: Santevia Gravity Water System 9.3/10
The Santevia Gravity Water System is the best gravity filter because it removes 99% of lead and 90+ other contaminants while also adding essential minerals like calcium and magnesium. Its thorough filtration process provides clean, great-tasting water for your household.
Pros
Here are five reasons why the Santevia Gravity Water System is our top pick.
Pro 1 of 5: Effective filtration
You turn on the tap, fill your glass, and take a sip — but do you really know what’s in your water? Most tap water carries invisible contaminants or additives, including chlorine, lead, and even traces of pesticides or pharmaceuticals.
That’s where the Santevia system comes in. It doesn’t just strip away the bad stuff—it carefully filters and then enhances your water, turning it into something that actually benefits your body.
It starts with a 3-micron ceramic pre-filter, which traps sediment, bacteria, and even microplastics before they reach your glass. Then, activated alumina works to remove 99% of fluoride and arsenic, while KDF filtration removes heavy metals like lead and mercury and prevents bacteria from growing in the system. Next, granular activated carbon absorbs chlorine, pesticides, and those weird tap water odors, leaving your water fresh and clean.
But here’s what makes Santevia special: After all that filtering, it doesn’t leave your water devoid of the good stuff water carries. Instead, mineral stones and natural zeolite infuse it with calcium, magnesium, and other trace minerals.
This not only improves the taste but also raises the pH, making it gently alkaline. The result? Clean water that hydrates better, tastes cleaner, and helps balance your body’s natural chemistry over time.
Pro 2 of 5: Tested to NSF standards
Not all water filters are created equal. Some products claim to remove contaminants but aren’t actually tested, leaving you wondering if they’re doing anything at all. Worse, low-quality filters can let harmful chemicals slip through or even grow bacteria over time.
That’s a problem when you’re just trying to get safe, clean water.
The Santevia System is tested to NSF Standards 42, 53, and 401, which means it’s been independently verified to reduce chlorine, heavy metals, pesticides, pharmaceuticals, and other nasty impurities. NSF 42 focuses on improving taste and odor, NSF 53 targets health-related contaminants like lead, and NSF 401 tackles newer pollutants, including prescription drug residues.
With Santevia, you’re not just hoping your water is safe — you know it is.
Pro 3 of 5: Versatile options and long filter life
Finding the right water filter can be a toss-up. Some take up too much space, others don’t hold enough water, and then there’s the never-ending struggle of remembering when to change the filter. If you’re tired of constantly refilling tiny pitchers or guessing when your filter is past its prime, Santevia has you covered.
This system comes in two options: a countertop version for home use and a dispenser version for easy access in shared spaces. Both hold 2.6 gallons (10 liters) of clean, filtered water — enough to replace 2,920 single-use plastic bottles every year for a household of two.
But here’s where it gets really good: These systems come with seriously impressive filter longevity. The ceramic pre-filter keeps going strong for a full year, while the 5-stage filter maintains peak performance for six months. The mineral stones? They’ll keep mineralizing your water for two whole years.
No more guesswork about when to replace filters, thanks to their clever Filter Ease program. Just sign up and you’ll get automated notifications that keep your water system running smoothly.
Pro 4 of 5: Made with nontoxic materials and comes with a lifetime warranty
Not all water filters are as “clean” as they claim. Some are made with plastics that leach harmful chemicals like BPA (Bisphenol A) and BPS (Bisphenol S) into your drinking water — exactly what you’re trying to avoid. No one wants to invest in a water filter only to wonder if it’s doing more harm than good.
With Santevia, you don’t have to worry. The system is made from BPA/BPS-free SAN plastic that is known for its superior thermal resistance and chemical resistance, meaning it won’t introduce any toxic chemicals into your water. It’s also built to last, which is why it comes with a lifetime warranty — if anything breaks, they’ll send you free replacement parts for life.
On top of that, you get free ground shipping to the continental US, so you’re not paying extra just to get safe, high-quality water straight from your own home.
Pro 5 of 5: Proceeds benefit a noble cause
In a world where corporate greed often drowns out compassion, many companies talk big but deliver little when it comes to real social impact. Most businesses see profits as the only bottom line, forgetting the human stories behind every purchase.
Santevia is different. They’ve set an ambitious goal: donate 100,000 years of clean water by 2030. Every time you buy a Gravity Water System, 100 days of clean drinking water goes to Ugandans living in water poverty through their charity partner, ACTS for Water. And here’s the best part — 100% of donations go directly to building clean water infrastructure.
Plus, Santevia hosts an annual gala to raise extra donations that cover overhead costs. So when you invest in cleaner water for yourself, you’re also helping families around the world get access to something they desperately need.
Cons
While the Santevia Gravity Water System provides pure, crisp, and great tasting water, there are three things you need to be aware of.
Con 1 of 3: Plastic construction
One downside of the Santevia Gravity Water System is its plastic construction, especially when compared to stainless steel alternatives like the Crown Berkey and Waterdrop King Tank.
Stainless steel is more durable and resistant to wear, while plastic can sometimes feel less sturdy over time.
That said, not all plastic is created equal. Santevia uses BPA- and BPS-free SAN plastic, meaning you don’t have to worry about harmful chemicals leaching into your water. Plus, its lightweight design makes it easier to move around compared to heavier stainless steel options.
Con 2 of 3: Limited pH range
The second drawback of the Santevia Gravity Water System is its limited pH range. While it does raise the pH of your water by +2.0, it doesn’t reach the same alkalinity levels as high-end water ionizers. If you’re looking for ultra-alkaline water, a dedicated ionizer might be a better fit.
That said, ionizers can cost thousands (and the science of alkaline water benefits is unproven), while Santevia offers a far more affordable way to enhance your water’s taste and quality. You still get a pH boost, plus essential minerals — all without breaking the bank.
For most people, this is more than enough.
Con 3 of 3: Slow operation
The third con of the Santevia system is its slow filtration speed. It takes about two to four hours to fully filter water from the upper to lower chamber. If you’re used to instant filtered water from pitchers or faucet attachments, this might feel like watching paint dry.
But this gradual process is actually typical for gravity systems. The slow flow allows for thorough filtration as water naturally passes through multiple purification stages.
While you’ll need to plan ahead (maybe fill it before bed or work), the upside is cleaner, mineral-rich water without any rushing or shortcuts. Consider it the crockpot of water filters — slow but consistently excellent results.
Overall 9.3/10
The Santevia Gravity Water System is a solid choice for anyone who wants clean, mineral-rich, alkaline water without breaking the bank. It removes contaminants, boosts pH, and even helps reduce plastic waste. While it’s made of plastic, it’s BPA/BPS-free and built to last.
If you want better-tasting, healthier water without spending a fortune, this is your sign, ditch bottled water and make the switch to Santevia today!
Best for Large Groups: Crown Berkey 8.5/10
The Crown Berkey Gravity Water Filter is an excellent gravity water filter for a large family or group. It has a six-gallon tank, which can meet the needs of up to 10 people, and lots of space for more filters to increase the flow rate.
Pros
Here are the four features you’ll love about the Berkey:
Pro 1 of 4: Removes 200+ contaminants
The first benefit of this Berkey filter is that it targets more than 200 contaminants in city water, including trihalomethanes, inorganic and organic compounds, heavy metals, and pharmaceuticals. These filters also reduce the most harmful contaminants, such as lead, arsenic, and forever chemicals.
It uses three-stage filtration that includes a sub-micron sediment filter, activated carbon, and a proprietary mystery media that filters out a bunch of chemicals. I don’t love that we can’t determine what’s actually in there, but the filter passed all the tests, and the data is good. What’s even better is that the Black Berkey filter elements undergo rigorous third-party testing, providing detailed lab reports for your peace of mind. This solidifies Berkey’s credibility in terms of filtration performance. Plus, if you’re concerned about fluoride, Berkey offers fluoride filters that you can bundle with your purchase.
If you need a big tank-style gravity filter that does a great job of filtering your water, the Crown Berkey is the way to go.
Pro 2 of 4: Superior flow rates
The second pro of the Crown Berkey filter is its high flow rate. If you run out of water, you won’t have to wait ages for it to fill up with filtered water again.
The standard configuration, with just two filters, runs at six gallons per hour, meaning you can fill the entire thing up and filter it in just an hour. If you want to shell out some more money and use eight filters, the flow rate increases to a whopping 26 gallons per hour. This means it would take roughly 13 minutes to filter the entire thing.
Berkey’s superior flow rate makes this gravity water filter perfect for heavy water demands. If it fits your bill, get yourself one here.
Pro 3 of 4: Lifetime warranty and 30-day money-back guarantee
The third advantage of buying Berkey is you’ll get an impressive lifetime warranty and a 30-day money-back guarantee. Given the filter’s high price, I had equally high expectations for its warranty coverage — and I wasn’t disappointed.
If you’re in the market for a substantial tank-style filter that’s built to last a lifetime, Berkey is undoubtedly the top choice.
Pro 4 of 4: Suits large families and groups
The fourth best thing about this filter is its huge capacity of six gallons.
This bad boy can hold a lot of water, meaning it can filter water for big groups and large families. Whether you’re having a party, going camping with friends, or just living with a lot of people, this filter has you covered with plenty of drinking water for everyone.
If you’re looking for a big tank-style filter that can handle your next shindig, you should get yourself the Crown Berkey Gravity Filter.
Cons
While it’s a great gravity filter, there are two notable downsides to the Crown Berkey that you should be aware of.
Con 1 of 2: Costly purchase price, filters, and accessories
If you’re thinking about getting the Berkey filter, remember that replacing the filters and adding a water-view spigot can be expensive. These extras can make the total cost higher than some other filters.
I have no problem recommending expensive products that work. After all, this is our drinking water we’re talking about. But these do go a bit above and beyond, so be prepared.
It might be more expensive, but it’s one of the largest gravity filters on the market. It eventually pays off well, especially if you’ve been buying bottled water.
Again, if you have a family of six and drink only bottled water, or you’re using this for large groups consistently, the costs eventually even out. But if you’re just a family of four looking for a great filter, other options won’t hurt your wallet quite as much.
Con 2 of 2: Can’t be used with a water softener
Another thing to keep in mind is that Berkey specifically states that its filters should not be used with a water softener. This is because water softeners exchange hardness minerals (calcium and magnesium) for sodium. Something in Berkey’s mystery filter media must react with this sodium since the company says it will clog the filters. But it also says that if your water is hard you may need to clean the filters periodically with vinegar to remove scale buildup.
In general, slightly hard water is not a concern and the minerals inside can actually be good for you. However, if you have moderately to very hard water, it will cause all sorts of other problems around the house, such as scale buildup on fixtures and appliances, streaks and stains, poor lathering of soap, and skin irritation.
If you want to remove these issues, a Berkey filter might not be for you. The other gravity water filters on this list don’t have this issue. You could also opt for a whole-house water filter and softener combo, which would deliver soft, clean drinking water to the entire home for the price of roughly two Berkeys.
Overall: 8.5/10
For large families or groups, the Crown Berkey Gravity Water Filter is a truly excellent option.
It’s more expensive than other gravity filters, but it’s also one of the largest out there. And it does look great, plus it comes with an impressive lifetime warranty and a 30-day money-back guarantee.
If you’re ready for crystal-clear drinking water for your entire family, pick up the Crown Berkey Gravity Water Filter now.
Best for Small Households: Waterdrop 2.25 King Tank 9.20/10
The Waterdrop 2.25 King Tank Gravity Water Filter is the best among small gravity water filters if bacteria isn’t an issue. It boasts a compact design that travels well, and it will remove common contaminants that make water taste and look unappealing.
Pros
There are four things to like about Waterdrop King Tank Gravity Filter.
Pro 1 of 4: Removes chlorine, rust, sediment, and heavy metals
The first benefit of the Waterdrop King Tank filter is that it improves the taste and odor of city water laden with chlorine and its by-products, as well as enhancing your water’s look and taste by removing sediment and rust. It also reduces heavy metals, which can be extremely harmful, especially for children.
The King Tank uses a pair of natural coconut-shell activated carbon filters that remove chlorine, rust, and impurities, such as organic compounds. If you’d rather not have fluoride in your drinking water, even though fluoride levels in city water are safe, you can add a Waterdrop fluoride filter separately. But keep in mind that, unlike the Santevia Gravity Water System that tackles all the stuff you don’t want with just one filter, you’ll need to cough up some extra cash for Waterdrop’s fluoride filter.
In the end, if your city water’s got you holding your nose and cringing at the taste of disinfectants, the Waterdrop Gravity Filter is a great choice.
Pro 2 of 4: Long filter life
The second benefit of the Waterdrop King Tank is its long lifespan. The filter consists of a pair of coconut-shell carbon filters, used simultaneously and each with a capacity of 3,000 gallons. Waterdrop’s fluoride filters will last 1,000 gallons before requiring replacement.
A longer filter lifespan translates to less-frequent filter changes and lower costs.
But if you just did the math for the King Tank’s capacity and realized it should last for 25 years, think again. I recommend replacing them annually or after every two years to prevent bacterial buildup and ensure optimal performance. It’s also important to note that the actual filter lifespan may vary depending on your water quality.
Looking for a filtration system with an extended lifespan? The Waterdrop King Tank offers just that.
Pro 3 of 4: Free water level spigot and other accessories
The third great thing about this water filter is it comes with a free water level spigot, unlike other filters that make you pay for it separately. The water level spigot lets you easily check how much water is left without having to open the lid.
Also, you’ll get a wrench to help set up the filter as well as a strong stand with non-slip corners. It can hold up to 220 pounds without bending, so you can trust it to keep your filter steady.
If you’re seeking convenience and value, the Waterdrop King Tank is the perfect choice.
Pro 4 of 4: Good for single people and couples
The fourth thing I like about the King Tank is that it’s perfect for individuals or couples seeking a compact and portable filter that effectively filters city water. You don’t just need a good filter; you need a good filter that suits your family. Don’t pay for more than you need.
The size of this unit is what really stood out to me. The tank can hold 2.25 gallons of water at a time, which is enough for two people to drink enough water all day, possibly more.
This compact size is ideal for kitchens with limited space and even for traveling. What makes it easy to travel with compared to other filters is its top chamber can nest inside the bottom one, cutting the whole unit down to half the size so you can easily carry it anywhere.
If you live alone or with just one other person, and if you’re seeking a compact and convenient gravity water filter, the Waterdrop King Tank Gravity Filter could be your next smart purchase.
Cons
Three cons you should be aware of:
Con 1 of 2: Doesn’t display lab test reports
First, while Waterdrop claims this filter is third-party tested, I couldn’t find any lab performance sheets or test reports on the website.
If a brand is reluctant to openly share its certifications and test reports, it might be hiding something.
Considering brands like Berkey offer similarly designed filters that come with test reports, Waterdrop should be more transparent about its filter’s performance.
Con 2 of 2: Not the best warranty
The second issue is that while its competitors offer pretty good warranties, the warranty provided by Waterdrop pales in comparison. Waterdrop offers a one-year limited warranty and a 30-day money-back guarantee.
These gravity water filters are pretty standard in terms of design and construction, so there’s no reason they should just break. But it’s our policy to favor products with longer warranties, and this one falls a bit short.
Overall: 9.2/10
Get the Waterdrop 2.25 King Tank Gravity Water Filter if you live alone or with one other person and you want an effective, low-maintenance stainless-steel gravity water filter.
It doesn’t offer the best warranty, but it’ll remove bad odors and funny tastes from your city water and give you 2.25 gallons of filtered drinking water every single day.
If you’re unsure if this is the right filter for you, take advantage of the 30-day return period and try it out worry-free.
Best for Backpacking: MSR AutoFlow XL 8/10
The MSR AutoFlow XL (10 liter) is the choice for you if you’re a camper or hiker and want to bring a compact filter with you that will remove bacteria, parasites, and particulates from wild water sources.
Pros
Here are the benefits you can get out of MSR Gravity Flow:
Pro 1 of 3: Removes 99.99% of bacteria, viruses, and protozoans
The first pro of the MSR Autoflow XL is its ability to purify water of some of the dangerous substances lurking in wild water sources, which makes it the best gravity-fed water filter for backpacking.
It uses special hollow-fiber membrane technology to filter out a whopping 99.99% of bacteria and protozoa. That means you can sip safely from wild streams or lakes without worrying about getting sick. Plus, it’s got a nifty sediment trap that keeps out sand, silt, and dust. Don’t just take my word for it — it’s certified against the NSF/ANSI standard P231 for removing bacteria, viruses, and protozoa, so you can trust its filtration power.
If you’re planning your next hiking adventure, the MSR Autoflow XL is exactly what you need.
Pro 2 of 3: Huge capacity and fast flow rate
The second pro of the MSR AutoFlow XL is its size and flow rate.
The bag itself can hold 10 liters of water. That’s enough for five people to drink all day, or more if you just need it at night after hiking or doing something else. It’s also enough if you need it for drinking and cooking, which you often do when out in the woods. The large size also means fewer trips to the water source so you can enjoy relaxing around the campfire.
With a 1.75-liter-per-minute flow rate, it takes 10 minutes to fill it, which is not going to be as fast as your faucet at home. But it’s pretty close! And you’re in the woods, remember!
If you’re seeking a reliable water filtration solution with ample capacity and a decent flow rate for your outdoor excursions, MSR AutoFlow XL is the way to go.
Pro 3 of 3: Ideal for backpacking
The final thing to love about this filter is simply how perfect it is for backpacking overall. From the use of high-quality material in its manufacturing to how easy it is to fold or carry, this is the water filter you want on your next hiking trip.
The filter is made from top-quality plastic built for use outdoors. It can even withstand a six-foot fall on concrete! (We hope you don’t get a chance to test that.) It can easily fold into your pack, and you can sling the bag over a tree and people can grab water as they need it thanks to the included hang strap and bag clip. This also makes it easier to use since it needs gravity to work. Putting it up high ensures the fastest flow rate. The included tube makes it simple to transfer water into any container for storage.
If you like to go out into the woods and drink water from the local stream, the MSR AutoFlow XL is for you.
Cons
A couple downsides to this filter:
Con 1 of 2: Not effective against chemicals
First, this filter sadly cannot remove chemicals. This shouldn’t be a major concern for most people. But if you’re going to be drinking from sketchy water supplies, you might want to spend extra for a filter that will remove everything.
Since it can’t remove chemicals, it’s best for those who go far away from cities and camp in the backcountry where they are unlikely to encounter industrial contamination. But if you want to drink from the river that runs through your town, I wouldn’t use this filter — or really do that at all.
Con 2 of 2: Expensive
Speaking of money, the second knock on the AutoFlow XL is that it’s kind of expensive. You can get cheaper filters, but they’re not as big, not as rugged, and don’t have hanging straps.
To me, this one is worth the extra cash. Just know that cheaper options are available, like the Katadyn gravity water filter.
Overall: 8/10
If you’re a hiker, camper, or hunter, and you need a solution for water filtration while out in nature, the MSR AutoFlow XL is a great option. It’s large (10 liters), rugged, fast, and comes with a hanging strap and bag clip for extra convenience.
As you plan your next hiking or camping trip, get the MSR AutoFlow XL before you go.
Honorable Mentions
SimPure U3P
Bacteria in drinking water isn’t just gross—it can be dangerous. If your water comes from a well or another untreated source, it could be hiding harmful microbes that lead to stomach issues and other health risks. No one wants to play roulette with their drinking water.
That’s where the SimPure U3P comes in.
Its biggest advantage is the UV filter that zaps away 99% of bacteria, making it a great choice for those relying on groundwater sources. However, if you’re on city water, this feature isn’t a must-have since municipal supplies are usually treated at the source.
The biggest downside is the price. It costs more than the Santevia Gravity System, which already does an excellent job of filtering contaminants while adding healthy minerals. So unless you need the UV purification, you might be paying extra for something you don’t really need.
Overall, the SimPure U3P is a solid choice for bacteria-prone water, but for everyday use, the Santevia system gives you better value without the higher price tag.
Doulton Stainless Steel Gravity Filter System
The Doulton Stainless Steel Gravity Filter System looks a lot like a Berkey, but it’s not. Doulton has been making ceramic filters and other water filtration systems for a little more than 170 years, and the quality is unmatched.
One cool thing about the Doulton filter is that it comes in three sizes, with the largest being 3 gallons. The 1.5-gallon option might be great if you want something portable. Also, despite being of good quality, Doulton filters are rather modestly priced.
However, this water filter has a low flow rate, around 0.5 gallons per hour maximum. Still, this is an excellent filter that won’t disappoint. Get the Doulton Stainless Steel Gravity Filter System here.
Katadyn Gravity BeFree Water Filtration System
The MSR AutoFlow XL may be ideal for backpacking, but like I said above, it’s a bit expensive. If you want something a bit more affordable, check out the 3-liter Katadyn Gravity BeFree Water Filtration System.
It’s similar in design to the AutoFlow, but this filter is smaller. The Katadyn design is unique, featuring three separate one-liter bags. One is for unfiltered water and the other two are for clean water. The idea is you fill one and empty it into another and then repeat so that you always have two liters of clean water. In theory, you could empty the bag into a bottle or something else to get more water out of the filter.
This is less convenient than the AutoFlow’s 10 liters, but it’s also about half the price. If you need something to take camping and you want to save a few bucks, the Katadyn Gravity BeFree Water Filtration System is a good bet.
The Bottom Line
If you’re looking for a high-quality and dependable gravity-fed water filter, look no further. The Santevia Gravity Water System stands out for its effective and certified filtration of over 90 contaminants, plus it adds essential minerals for better taste.
For those looking for something larger, there’s the Crown Berkey Gravity Water Filter. Still, not everyone is looking for a giant unit but rather something portable to support their adventures. If that’s you check out the MSR AutoFlow XL.
Gravity filters are on the cutting edge of water filtration, combining convenience with superior water quality. Get started with yours today.
Research Methodology
Given the importance of effective water filtration and the wide range of products on the market, researching and reviewing the best gravity water filter requires a systematic approach that uses both qualitative and quantitative data.
At Drinking Water, we use a seven-point research methodology to test all our products.
You can read all about how we review water filters, but here’s a summary of what’s involved:
Use analysis
The first step in any water filter review I write is to make sure the design of the product I’m examining aligns with its purpose. This might sound obvious, but water filtration is a very specific industry. To make money, manufacturers will often try to sell products designed for a specific purpose for a wide range of uses. This doesn’t usually work and is the first step in our process of elimination.
Learn more about the use analysis stage of our reviews.
Tech check
The next step is to dive deep into the filter technology in whatever treatment system I’m reviewing. Again, the water filtration world is one of pretty exact science. It’s pretty easy to spot unsupported claims, and if there’s some new technology out there, there’s also research to support it. Before we recommend a product, we vet all the technologies being used in multiple ways.
Learn more about how we do a tech check on all the products we review.
Water test data
It’s not enough to simply analyze the products we review based on their use case and technology. I also rely heavily on data to make sure the filters I’m reviewing can actually do what they claim to. We collect data from companies and verify it, we get it from independent sources, and we’ll also collect it ourselves when needed, all in the name of finding the truth.
Learn more about how we collect and use water test data for our reviews.
Installation test
Once I’m comfortable with the functionality of a filter, I start to look at its usability.
The first step is installation. Do you need a PhD to put this thing in? Or is it fairly straightforward? Needing a professional isn’t a deal breaker, but I want to know what it takes to get a filter up and running.
Learn more about how we do our installation tests.
Cost-of-ownership analysis
The cost of buying a water filter does not end when you make your initial purchase.
Filter elements need to be replaced, and these have their own costs. When I review products, I consider all the money you might have to spend over a 10-year period, so you have a complete picture and accurate comparison of costs.
Learn more about how we conduct our cost-of-ownership analysis.
Warranty check
Water filter solutions tend to be expensive, which is why I prefer products that are built to last. Part of this is the warranty. Companies need to stand by their products. But warranties can be full of fine print and tough to understand, so we do the work for you.
Learn more about what goes into our warranty check.
Customer service test
The last step of our review process is to look into the customer service operation of the companies we’re recommending. I want to set you up with good people, so I make sure to check them out before I recommend. This involves running dummy tests on customer service teams, reading reviews, and talking with past customers.
Learn more about how we do our customer service test for each product.
Before You Buy a Gravity Filter
If you’re brand new to the world of gravity filters, here are a few things you should know.
First, a gravity-based water filter is a type of water filter that uses gravity to work. Duh, right? Basically, the water starts up high and then trickles down (hence, gravity), passing through the filter element as it does.
In most cases, these filters look like large water coolers. They have an upper and lower chamber, with the filter in the top. You will manually fill the top with tap water and then it will slowly drip down into the lower chamber. You attach a spigot to the lower chamber to access water when you need it.
Second, the big advantage of these filters is they don’t require any electricity and are easy to transport. They sit on your countertop, but you can totally bring them outside. So, the next time you host a barbecue, you can provide your guests with clean, filtered drinking water right out on the patio.
A few things to note about gravity-fed drip filters like these:
- Capacity is limited. These filters have tanks and once they’re full, they’re full. If you need more water, you need to drain it and fill it from the top again.
- Flow rates are slow. The nature of gravity filtration means it can sometimes take hours for your tank of clean water to fill. For this reason, it’s super important you get the right-sized gravity system.
- City water only. While gravity filters can be used for well water in certain cases, the reality is that the vast majority of these products are designed for city users.
Gravity water filters are a convenient alternative to whole-house water filters, which connect to your main water lines and provide filtered water to every tap in your home.
These solutions tend to be more expensive, but they do improve the quality of your water throughout the house. Gravity filters, on the other hand, only filter what’s inside the unit.
They are also a more sustainable way to get clean drinking water in your home without relying on plastic bottles.
Most people buy a unit that’s large enough to store more than one day’s worth of water for their home. Then, each night, they fill it before they go to bed. This ensures there’s enough time for the filter to work and enough water for everyone for the entire day.
Now that you have a better understanding of gravity filters, let’s get back to the best, so you can find the right one for you.
Back to product recommendations
Dive Deeper: In-Depth Water Filtration Guides
If you need more information about gravity filters and water filtration in general, here are some resources to help you:
- Types of Water Filters
- Best Countertop Water Filters
- Best Fluoride Water Filters
- Best Water Filter Pitchers
Frequently Asked Questions
Which is the best gravity-based water purifier?
The Santevia Gravity Water System is the best gravity-based water purifier on the market thanks to its effective filtration of over 90 contaminants including fluoride, lead, and chlorine. It also adds back essential calcium and magnesium minerals which improves the taste of water.
Are gravity-based water filters any good?
Gravity-based water filters are a great home water filtration solution if you have city water and want to remove a wide range of contaminants with an easy-to-install and low-maintenance system.
Are gravity filters effective?
Yes, gravity filters are highly effective so long as they are equipped with the right filter media. Nearly all gravity filters on the market are designed for city water, so if you use this type of water, gravity filters can be an extremely effective solution.
Hi there, have you ever tried dry element gravity water filters. dryelement.com was wondering your thoughts on this one?
Hi Roxanne, Based on their website, they have developed a filter cartridge using activated carbon-impregnated fabric. The carbon is also impregnated with silver, which is bacteria-static and inhibits microbe growth. Both of these technologies have been around a long time. The main objective with gravity flow filter systems is the water has to flow through the filter cartridge without being under pressure, like the water in your home. The manufacturer is using a filter technology that allows the free flow of water simply by gravity. It looks like this would be a good filter if you were prepping for a disaster and had no household water under pressure.
We have extremely hard water, with high manganese. Will this work well, and will it remove any of the hardness?
Hi Charlotte,
Gravity filters, in general, are not really designed to work as water softeners. Depending on the design, they typically remove heavy metals and organic chemicals as the primary function.Some remove a bit of calcium but not as much as other filtration methods. If you want water that is low in water hardness minerals for drinking and cooking, a reverse osmosis filter system will provide very pure water that takes great. It is also good for misting plants, cooking, making tea, and other beverages.
I’m on city water that is on the hard side. While I like that these filters take the junk out, it will fail with family members if it doesn’t improve the taste of the water. Do these filters improve the taste?
Paul,
There are two major causes of “taste” issues with drinking water. The chlorine disinfectants are one of them. Most people don’t like the taste and odors caused by the chlorine chemicals. The second most common issue is the chemical make-up of the water. It is not so much odor as it is the flavor certain combinations of minerals, like sulfate, iron, manganese, sodium, potassium and other metals and minerals. The absolute best way to eliminate all of these factors is with a reverse osmosis system. The filtered water simply will not have any of these minerals. Some people, like myself, love the taste of RO water. Some of the bottled “filtered” and spring water products either have a natural blend of minerals or the minerals are added to the filtered water to create a certain flavor. Minerals are not “bad” and they actually give water a nice taste, IF they are present in the right ratio. With the gravity filters you will definitely get purer, better-tasting water. But will it satisfy your family? I can’t say for sure. You can perform this test. Buy some distilled water and some spring water. Spring water will contain minerals that flavor the water. Have your family do a blind taste test. Don’t tell them which water they are drinking. See if like the distilled or mineral water. If distilled, an RO system will make them happiest. If mineral water, the gravity filter should do the job.
I have a question that has not been addressed in your review. I understand the basic function of the gravity filters. I have seen many variations used in countries without advanced water treatment. What happens when the filter ages. Is there not a chance for bacteria to grow in the filter? I have seen instructions on periodic disinfection or discarding of these portable filters, when they are donated to villages that have no central water purification system.
Raj, That is a thoughtful question. How long any filter lasts is mostly dependent on how much “stuff” is in the water. If the incoming water has a lot of particulate matter, like algae, sand, and suspended soil, the sediment filter will clog quickly compared to a water supply that has been pre-filtered by a complex multi-stage treatment regimen. Another not often discussed subject is bacteria growth inside filter cartridges. No incoming water supply is completely free of microbes. Even chlorinated water can have a few stray cells that will make it through the disinfection step. Often the bacteria are harmless but they do take up residence in filter cartridges. Over time the cartridges will get a slimy coating of bacteria that clogs up activated carbon and other filter media. The slower-flowing filters tend to develop more bacteria growth than filters that are fast-flowing. It appears that the more aggressive (and frequent) flushing of water through a filter system inhibits or flushes away the bacteria. I am always somewhat concerned when filter manufacturers make claims that filters will last “years” before needing to be changed for this reason. I prefer to swap out replaceable cartridges every 6-9 months.
Would you rate the Santevia Glass water system the same?
Alicia, I took a look at the filter through the eyes of a water filtration engineer. Think of the Santevia as a stationary pitcher filter that uses a replaceable cartridge containing filter media. The cartridge uses a blend of activated carbon, KDF, and activated alumina. These are all common, well-known, reliable filter media used in water filters around the world. I’m not sure what type of ion-exchange resin the company uses so I cannot say if it is doing anything or estimate the lifespan. The Santevia appears to do what many pitcher filters do. On the website they say the difference they bring is adding minerals (Calcium and others) to the filtered water. I am not a fan of adding chunks of minerals to a water filtration system. It is true that certain minerals in the right ratio give water a nice taste. But everyone’s water already. Your water probably isn’t lacking minerals and adding a pinch more isn’t going to dramatically improve the taste. Also, we get plenty of minerals through our diet and supplements (if there is a need for calcium, iron, etc.). I drink reverse osmosis water. It contains very little trace elements and minerals. I recently had a blood analysis performed to check my electrolyte balance. I eat healthy and the results revealed a perfect balance. But I am sure many people like the idea of “re-mineralization” and believe it is a feature they are willing to pay for. So overall, the Santevia is going to improve your water quality and make it taste better! I like the glass container. Remember, algae is going to grow in the container, eventually. Algae travel through water vapor and settle in coffee maker reservoirs and water pitchers, etc. You will eventually have to soak the filter system with dilute bleach. Remove the filter cartridge first. Soak for an hour or longer and rinse with tap water. You’ll probably need to use a paper towel or fine brush to get into the corners. Don’t be alarmed. This is completely normal and part of filter servicing.
Wow! This is exactly what I was looking for! Thank you so much, very helpful info.
I’m actually trying to decide between this system, and The Water Machine. Would you guys be willing to do a review of that one? It’s the one that supposedly the filters last 10 years?
Alicia, The Water Machine looks to be a simple variation of many gravity-fed activated carbon block filters.AS they say on their website, they use the same carbon block filters as other companies but sell them for less. Algae will grow in the clear chambers, which happens with any plastic or glass container. Ever look inside a coffee maker water chamber that is not cleaned frequently? You’ll find algae in there. The company claims 11 years of use with the carbon cartridges. This is pretty crazy. Natural bacterial will fully coat the carbon filters in about a year (I am painting lifespan with a broad brush since water quality varies from place to place). But 11 years is just crazy. They also claim that removing certain substances increase alkalinity. That is not possible. Alkalinity is bicarbonate and carbonate-natural minerals that stabilize pH. Removing something does nor raise these minerals. Do they mean pH? I don’t know but either way this claim makes no sense. I would consider this filter as another gravity filter that improves taste and odors. Is it the “best” filter compared to all others as they claim? No. Is it a poor water filter? Certainly not. If you are looking for a general improvement in water quality with no removal of minerals (which can have a large influence in the taste of the water), this may be the filter for you. I would change the filters every 6-9 months. Otherwise you will most-likely have bacteria growth on the filters, reducing efficiency and cause taste and odor issues.