The deciding specification is what each system does at the tap, from a 30 cup dispenser to a faucet mounted five stage filter.
By the Lush Editorial Team·Researched & Compared
I compared five countertop water filters using only the dimensions, weights and features each manufacturer publishes.
Holds 27 cups and includes a filter rated for 40 gallons.
Clear housing lets you see the cartridge and when to change it.
Five stage process with a 12 month or 8,000 gallon service life.
Dishwasher safe body, with a pull down spout and a carrying handle for refills.
Five stage filtration with a washable ceramic element and no power needed.
| Model | Brand | Size (capacity) | Weight | Best for |
|---|---|---|---|---|
| Brita X-Large 27 Cup Water Dispenser | BRITA | 27 Cup | 3 lb | Best for a large household |
| iSpring CKC1C Chlorine Removal Countertop Water Filt... | iSpring | Countertop Water Filtraiton - Clear | 3.09 lb | Best for visible filter checks |
| Waterdrop CTF-01 Water Filter for Sink Faucet | Waterdrop | Basic-1 Filter | 4.07 lb | Best five stage faucet mount |
| PUR 30-Cup Countertop Water Filter Dispenser | PUR | 18 Cup | 0.5 lb | Best slim dishwasher safe dispenser |
| Amwater Countertop Water Filter | Amwater | not published | not published | Best washable ceramic element |
Holds 27 cups and includes a filter rated for 40 gallons.
Clear housing lets you see the cartridge and when to change it.
Five stage process with a 12 month or 8,000 gallon service life.
Dishwasher safe body, with a pull down spout and a carrying handle for refills.
Five stage filtration with a washable ceramic element and no power needed.
The BRITA X-Large holds 27 cups and the PUR is published as a 30 cup dispenser in its own title, the two largest stated capacities here. The iSpring CKC1C alone has a clear housing for inspecting the filter. The Waterdrop CTF-01 publishes a five stage process and a 12 month or 8,000 gallon service life. The PUR is the only dishwasher safe body, though its 0.5 pound field cannot be a 30 cup dispenser. The Amwater alone uses a washable ceramic element and publishes no weight.
“Five filters, five different jobs at the tap.”
Lush Editorial Team
Priorities, not a computed score. The inputs are published specifications, so we rank by what matters most and say how much.
The five systems split into two groups by installation. The BRITA and PUR are dispensers that sit on a counter or shelf and hold a stated number of cups. The iSpring, Waterdrop and Amwater connect to a standard kitchen tap and are rated in gallons. That single difference decides more purchases than any other figure on this page, because a faucet mount cannot fill a pitcher in the refrigerator and a dispenser cannot run water directly from the tap.
Within each group the published numbers separate them further. The BRITA publishes 18.0 inches of depth and the iSpring 12.0 inches of height, so both need planning before they arrive. Published weights run 3.0 pounds for the BRITA, 3.09 pounds for the iSpring and 4.07 pounds for the Waterdrop. The PUR fields read 2.09 by 6.02 by 3.98 inches at 0.5 pounds, which cannot describe a 30 cup dispenser, and the Amwater publishes dimensions but no weight.
| Specification | BRITA X-Large 27 Cup | iSpring CKC1C | Waterdrop CTF-01 | PUR 30-Cup DS1800Z | Amwater 5-Stage |
|---|---|---|---|---|---|
| Width | 5.67 in | 5.0 in | 7.28 in | 2.09 in | 4.0 in |
| Depth | 18.0 in | 5.0 in | 15.43 in | 6.02 in | 13.6 in |
| Height | 10.47 in | 12.0 in | 5.91 in | 3.98 in | 11.8 in |
| Weight | 3.0 lb | 3.09 lb | 4.07 lb | 0.5 lb | not published |
| Variant named on the listing | 27 Cup | Countertop, Clear | Basic, 1 Filter | 18 Cup | not published |
| Installation | Counter dispenser | Faucet mount | Faucet mount | Counter dispenser | Faucet mount |
| Filter life | 40 gallons or about 2 months | 6 to 12 months | 12 months or 8,000 gallons | 40 gallons or 2 months | 8,000 gallons, no interval |
| Stated stages | not published | 5 micron carbon block | 5 stage | not published | 5 stage |
| Power required | not published | not published | not published | not published | No power |
The table does not tell you how any of these systems performs in a kitchen. It lists what each maker publishes, and several cells read not published because the listing is silent. It also cannot tell you whether a faucet mount will fit your specific tap, which is the most common reason a countertop filter is returned. Check the faucet type against the compatibility note in each listing before ordering.
The BRITA X-Large 27 Cup Water Dispenser publishes a 27 cup capacity, second here only to the PUR’s stated 30 cups. It includes one Standard filter rated for 40 gallons or about two months, and the listing states that switching to a Brita system can replace up to 1,800 single use plastic bottles a year. That figure is the maker’s claim, not a measurement made here.
The dispenser publishes 18.0 inches of depth, so it needs a deep shelf or a wide counter space. It is 5.67 inches wide and 10.47 inches tall, and it weighs 3.0 pounds. The listing describes an easy locking lid, a precision pour spigot and a sticker filter indicator that shows when the filter needs changing.
The PUR 30-Cup Countertop Water Filter Dispenser publishes fields of 2.09 inches wide, 6.02 inches deep and 3.98 inches tall at 0.5 pounds. Nothing that size holds 30 cups, so those four figures are reported here rather than used, and the maker’s own sentences are used instead. The listing states that the body is dishwasher safe, which no other pick here claims, and that it has a pull down spout and a carrying handle for refills.
The included genuine PUR filter is certified to last for up to 40 gallons or two months of regular use. The listing states the system is NSF certified to reduce chlorine, mercury, copper and zinc. Note that the title and three of the bullets say 30 cup while the variant field reads 18 Cup, so the two published capacity figures disagree.
The iSpring CKC1C is the only pick with a clear housing, which the listing says allows a visual inspection of the filter so you know when it is time for a change. It includes a standard 5 micron carbon block cartridge that the maker states removes 95 percent of chlorine, odors, sand, silt, sediment and rust. That percentage is the maker’s published claim.
The system is 5.0 inches wide, 5.0 inches deep and 12.0 inches tall, and it weighs 3.09 pounds. Installation needs no drilling and no plumber, and the listing states it connects to most standard kitchen taps with the included wrench and adapters. A switch toggles between tap water and filtered water.
The Waterdrop CTF-01 is rated for up to 12 months or 8,000 gallons when connected to municipal tap water, and it is the only pick to pair a time with a volume rather than giving one or the other. It uses a five stage process that the listing states reduces colloids, sediments and up to 99 percent of chlorine, and helps reduce heavy metals and hydrogen sulfide. It also enriches water with calcium, magnesium and potassium.
The listing states plainly that the filter does not reduce TDS and that it is not compatible with pull out, handheld, spray style or sensor activated faucets. It is 7.28 inches wide, 15.43 inches deep and 5.91 inches tall, and it weighs 4.07 pounds, the highest published weight here. Installation needs no drilling and no plumber.
The Amwater Countertop Water Filter uses a composite ceramic filter element that the listing states is washable. It needs no power and produces no wastewater, which no other pick here states. The five stage filtration is published as reducing heavy metals, chemical impurities, sediment and up to 99 percent of chlorine. That percentage is the maker’s claim.
The unit is 4.0 inches wide, 13.6 inches deep and 11.8 inches tall in its published fields. It publishes no weight at all, so it cannot be set against the other four on that figure. Installation is a twist on connection to most standard kitchen taps with included adapters, and the maker states it suits a kitchen, bathroom, RV or office.
A washable ceramic element is a different maintenance routine from a sealed cartridge. The Amwater listing puts 8,000 gallons in its title but no interval in months, so the owner cannot plan a wash or a change by date. The other four picks all publish a service life in gallons or months, which makes their long term upkeep easier to schedule even though their cartridges must be replaced rather than washed.
The Amwater also publishes no weight, so a buyer who needs to know what the shelf is carrying has to look elsewhere. The dimensions it does publish, 4.0 by 13.6 by 11.8 inches, sit between the iSpring’s 12.0 inch height and the Waterdrop’s 15.43 inch depth. Those three figures are what there is to compare.
Large households that fill pitchers. The BRITA holds 27 cups and includes a filter rated for 40 gallons. Its 18.0 inch depth needs a deep shelf or a wide counter, so measure that space before ordering.
Renters who cannot drill. The iSpring, Waterdrop and Amwater all connect to standard kitchen taps with no drilling. Check your faucet type first, because the Waterdrop listing excludes pull out, handheld, spray style and sensor activated faucets.
Small kitchens with narrow shelves. The PUR is the only pick published as dishwasher safe, and its own words describe a slim body, a pull down spout and a carrying handle. Its dimension fields are too small to be a 30 cup dispenser, so measure the real thing first.
Owners who would rather not buy cartridges often. The Waterdrop is rated for up to 12 months or 8,000 gallons. The iSpring states 6 to 12 months depending on water quality. The BRITA and PUR filters are each rated for about two months.
Buyers who prefer a washable element. The Amwater uses a washable ceramic element and needs no power. Its weight is not published and its only service figure is 8,000 gallons in the title, so confirm the footprint from its 4.0 by 13.6 by 11.8 inch fields before you commit.
Several figures that would help a buyer compare these five are simply not in the listings. These are the gaps.
The PUR, on its own words: its title and three of its bullets call it a 30 cup dispenser, while its variant field reads 18 Cup. The maker's own sentences are the ones this page uses, so the PUR stands at 30 cups and the BRITA X-Large at 27 cups. The other three are faucet systems rated in gallons rather than cups.
None of the five requires a plumber according to the listings. The iSpring, Waterdrop and Amwater all state that no drilling is needed and that they connect to most standard kitchen taps with included adapters. The BRITA and PUR are dispensers that sit on a surface and need no connection at all.
On figures worth believing, the BRITA at 3.0 pounds, with the iSpring at 3.09 pounds and the Waterdrop at 4.07 pounds. The PUR field reads 0.5 pounds, which cannot describe a 30 cup dispenser with a carrying handle, so it is not used as a comparison here. The Amwater publishes no weight at all, so it cannot be placed on that scale.
The Waterdrop listing states that its five stage filtration reduces colloids, sediments and up to 99 percent of chlorine, and helps reduce heavy metals and hydrogen sulfide. It also states that the filter does not reduce TDS and that it adds calcium, magnesium and potassium, which may raise the TDS reading.
Only the PUR 30-Cup dispenser is published as dishwasher safe. The other four listings do not mention dishwasher use. The Amwater has a washable ceramic filter element, which is a different claim from a dishwasher safe body, and the listing does not say the housing can go in a dishwasher.
The BRITA and PUR filters are each rated for 40 gallons or about two months. The Waterdrop is rated for up to 12 months or 8,000 gallons. The iSpring states a 6 to 12 month supply depending on local water quality. The Amwater states 8,000 gallons in its title for a washable element but gives no interval in months.
Specifications come from the manufacturers' own published listings. Lush Food & Drink may earn a commission if you buy through a link on this page, at no extra cost to you. How we research.
