As Amazon Associates, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you if you click through and make a purchase.
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
These are the best berkey reverse osmosis systems based on published specifications. Berkey offers stainless steel gravity filters in various sizes, from compact 1.5-gallon models to 6-gallon units. The Big Berkey 2.25 Gal Gravity Filter leads this list because its 2.25-gallon capacity suits small households needing reliable daily drinking water without complex plumbing. We compared 9 products strictly by their listed dimensions, weights, and installation types. Each pick reflects the data provided in the product listings, ensuring you choose the right fit for your kitchen counter space.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Big Berkey 2.25 Gal Gravity Filter Best overall | small households needing 2.25-gallon capacity | |
| 2 | Royal Berkey 3.25 Gal Gravity Filter Also great | small households needing mid-sized capacity | |
| 3 | Royal Berkey 3.25 Gal Stainless Steel Also great | Medium families needing reliable gravity filtration | |
| 4 | Authentic Black Berkey BB9-2 Replacement Elements Best budget | Existing Berkey gravity system owners | |
| 5 | Royal Berkey 3.25 Gal Gravity Filter Best premium | small households needing fluoride reduction | |
| 6 | Crown Berkey 6 Gallon Countertop Filter Also great | high-volume household kitchen filtration | |
| 7 | Imperial Berkey 4.5 Gal Stainless Steel Also great | Small households needing moderate daily capacity | |
| 8 | Berkey Travel 1.5 Gal Stainless Steel Also great | Compact spaces and fluoride removal needs | |
| 9 | Big Berkey 2.25 Gal Countertop Filter Also great | small kitchen counters and low-volume use |
01 Berkey Gravity Filter Lineup Guide
Berkey systems are countertop gravity filters. They require no plumbing. You choose based on capacity and build material. Most units use stainless steel tops and bottoms. Sizes range from 1.5 gallons to 6 gallons. This volume determines how many people you can serve daily. Smaller models like the Berkey Travel 1.5 Gal fit tight counters. Larger units like the Crown Berkey 6 Gal serve bigger families. Height and footprint matter for your kitchen space. Some models are taller and narrower. Others are wider and shorter. Check the dimensions before buying. Weight also varies by size and filter count. Heavier units feel more stable. Lighter ones are easier to move. All models rely on gravity for filtration speed. There is no pump or electricity needed. You simply fill the upper chamber. Water drains through the filters into the lower chamber. This process takes time but uses no power. You get clean water without complex installation. The choice comes down to how much water you need. Pick the size that matches your household. Verify the height fits your counter. Consider the weight for stability. These factors separate the best options for you.
Big Berkey 2.25 Gal Gravity Filter
Best for: small households needing 2.25-gallon capacity
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 3.35 × 3.35 × 7.58 inches
- Weight
- 7.28 pounds
The Big Berkey is a 2.25-gallon gravity-fed water filter system designed for countertop use. It includes two Black Berkey elements that provide up to 6,000 gallons of filtration per pair. The unit measures 19.25 inches tall and weighs 7.28 pounds. It requires no electricity or plumbing. This system suits households of one to four people who need everyday drinking water without permanent installation.
- 2.25-gallon capacity for daily household use
- Includes two Black Berkey filter elements
- Up to 6,000 gallons of filtration per pair
- Countertop design with no plumbing required
- Constructed from polished AISI 304 stainless steel
- 2.25-gallon capacity is smaller than the 3.25-gallon Royal Berkey models
- 19.25-inch height is shorter than the 3.25-gallon Royal Berkey
- 7.28-pound weight is lighter than the larger Imperial or Royal units
- You need a compact system for one to four people
- You want a countertop filter that requires no plumbing
- You prefer a smaller footprint for limited counter space
- You require a capacity larger than 2.25 gallons
- You need a system for more than four people
- You want the tallest available Berkey gravity filter
Verdict: Berkey Big Berkey 2.25 Gal Countertop fits small households or apartments where a 2.25-gallon capacity and a 19.25-inch height are sufficient for daily drinking water needs without plumbing.
Royal Berkey 3.25 Gal Gravity Filter
Best for: small households needing mid-sized capacity
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 9.5 × 9.5 × 23 inches
This gravity-fed system holds 3.25 gallons of filtered water. It includes two Black Berkey BB9-2 elements that remove over 200 contaminants. The stainless steel body measures 9.5 by 9.5 by 23 inches. A water view spigot lets you check levels easily. It suits households of two to four people who want reliable, electricity-free filtration.
- 3.25-gallon capacity for 2–4 people
- Removes 200+ contaminants with BB9-2 elements
- Durable AISI 304 stainless steel construction
- Includes water view spigot for easy monitoring
- Filters up to 6,000 gallons per pair
- 3.25-gallon capacity is smaller than the 3.25-gallon and larger models listed
- 23-inch height is bulkier than the 18-inch variation
- Gravity-fed flow rate is slower than pressurized systems
- You need a countertop system for a small household
- You want to monitor water levels without opening the chamber
- You prefer gravity-fed filtration without electricity
- You require a capacity larger than 3.25 gallons
- You need a compact unit under 18 inches tall
- You want a pressurized system for faster flow
Verdict: Royal Berkey 3.25 Gal Gravity Filter fits small households needing a durable, mid-sized countertop option. The water view spigot adds practical convenience for daily use.
Royal Berkey 3.25 Gal Stainless Steel
Best for: Medium families needing reliable gravity filtration
- Dimensions
- 9.5 × 9.5 × 23 inches
- Weight
- 8 pounds
The Royal Berkey system offers a 3.25-gallon storage capacity for everyday household use. It is constructed from highly polished AISI 304 stainless steel and stands 23 inches tall. The unit includes two Phoenix Gravity New Millennium Edition filter elements, which can be expanded to four. This setup comfortably serves two to four people. Its 8-pound weight and 9.5-inch width make it a stable countertop option for medium-sized families needing reliable gravity-fed filtration.
- 3.25-gallon storage capacity
- AISI 304 stainless steel construction
- Expandable to 4 filter elements
- Stands 23 inches tall
- 23-inch height is taller than some compact alternatives
- Includes only 2 filters in standard configuration
- 8-pound weight adds bulk to countertop space
- You need a 3.25-gallon capacity for a family of two to four
- You prefer a tall, stable gravity-fed system
- You want expandable filtration up to 4 elements
- You require a compact unit under 15 inches tall
- You need more than 4 filter elements
- You prefer a smaller 2.25-gallon capacity
Verdict: Royal Berkey 3.25 Gal Stainless Steel fits medium households needing reliable, expandable gravity filtration. Its sturdy stainless steel build and tall profile suit those prioritizing capacity and durability over compact footprint.
Authentic Black Berkey BB9-2 Replacement Elements
Best for: Existing Berkey gravity system owners
- Dimensions
- 3 × 3 × 9 inches
- Weight
- 1.5 pounds
This is a set of two authentic Black Berkey BB9-2 replacement filters. They fit Big Berkey, Royal Berkey, and other gravity-fed systems. Each pair lasts up to 6,000 gallons. They remove over 250 contaminants without electricity or plumbing. The filters are 9 inches tall and weigh 1.5 pounds. You get reliable filtration for pennies per gallon.
- Removes over 250 typical contaminants
- Lasts up to 6,000 gallons per pair
- Compatible with multiple Berkey gravity systems
- No electricity or plumbing required
- Requires periodic replacement every 6,000 gallons
- Does not filter water by itself; needs a Berkey system
- You own a Berkey gravity-fed system
- You need replacement filters for existing units
- You want to reduce over 250 contaminants
- You need a complete water filtration system
- You want a single unit without gravity tanks
- You prefer electric or plumbed filtration
Verdict: Authentic Black Berkey BB9-2 Replacement Elements provide long-lasting, high-capacity filtration for existing Berkey gravity systems. They are the right choice for current owners needing reliable replacement filters.
Royal Berkey 3.25 Gal Gravity Filter
Best for: small households needing fluoride reduction
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 9.5 × 9.5 × 23 inches
- Weight
- 9.7 pounds
This Royal Berkey system offers 3.25 gallons of filtered water using gravity, requiring no electricity or plumbing. It includes two Black Berkey elements and two PF-2 fluoride filters. The stainless steel build measures 23 inches tall and weighs 9.7 pounds. It suits households of two to four people needing reliable countertop filtration for drinking and cooking.
- Includes PF-2 filters for fluoride and arsenic reduction
- 3.25-gallon capacity for 2–4 people
- Constructed from durable AISI 304 stainless steel
- Each filter pair handles up to 6,000 gallons
- 3.25-gallon capacity is smaller than the 3.25-gallon Royal model and 2.25-gallon Big Berkey options in the list
- 23-inch height and 9.7-pound weight require stable countertop space
- You need fluoride and arsenic reduction capabilities
- You want a gravity-fed system without plumbing
- You filter water for a small household of two to four people
- You require a capacity larger than 3.25 gallons
- You need an under-sink installation type
- You prefer a system with fewer than two fluoride filters
Verdict: Royal Berkey 3.25 Gal Gravity Filter provides targeted contaminant removal for small families. It fits you if you prioritize fluoride reduction and compact countertop storage over high-volume output.
Crown Berkey 6 Gallon Countertop Filter
Best for: high-volume household kitchen filtration
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 11 × 11 × 30 inches
The Crown Berkey is a 6-gallon gravity-fed system designed for countertop use. It features authentic Black Berkey Elements that reduce over 250 contaminants without electricity or plumbing. Each filter pair lasts up to 6,000 gallons. This stainless steel unit measures 11 by 11 by 30 inches. It suits households needing high-volume filtration for cooking and beverages.
- 6-gallon capacity for high daily usage
- Reduces over 250 typical contaminants
- Filters last up to 6,000 gallons each
- Requires no electricity or tools
- 30-inch height requires significant vertical clearance
- 11-inch width occupies substantial countertop space
- You need a large 6-gallon storage capacity
- You want to filter water without plumbing connections
- You cook or make beverages frequently at home
- You have limited vertical counter space
- You prefer a compact travel-sized unit
- You need a system under 30 inches tall
Verdict: Berkey Crown 6 Gal Countertop Filter provides high-capacity gravity filtration for families. It fits users who prioritize volume and contaminant reduction over a small footprint.
Imperial Berkey 4.5 Gal Stainless Steel
Best for: Small households needing moderate daily capacity
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 25.8 × 10 × 10 inches
- Weight
- 10.5 pounds
The Berkey Imperial is a 4.5-gallon gravity-fed system designed for countertop use. It measures 25.8 inches in length and weighs 10.5 pounds. The unit includes two Black Berkey Elements that reduce over 250 contaminants without electricity or plumbing. You get filtered water for pennies per gallon, with each filter pair lasting up to 6,000 gallons. This stainless steel unit suits kitchens needing moderate daily capacity.
- 4.5-gallon daily filtration capacity
- Reduces over 250 typical contaminants
- Filters last up to 6,000 gallons per pair
- Requires no electricity or plumbing
- Constructed from durable stainless steel
- 4.5-gallon capacity is smaller than the 6-gallon Big Berkey
- 25.8-inch length requires more counter space than smaller models
- 10.5-pound weight is heavier than travel-sized units
- You need a moderate daily water supply for cooking
- You want a countertop unit that requires no installation
- You prefer stainless steel construction for durability
- You have limited counter space and need a compact unit
- You require a high-capacity system for large families
- You want a portable filter for travel or camping
Verdict: Berkey Imperial 4.5 Gal Countertop Filter offers a balanced capacity for small households. It fits buyers who want reliable contaminant reduction without complex installation.
Berkey Travel 1.5 Gal Stainless Steel
Best for: Compact spaces and fluoride removal needs
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 8.5 × 8.5 × 19.2 inches
- Weight
- 6.97 pounds
The Berkey Travel system offers a 1.5-gallon capacity for compact spaces. It uses gravity-fed filtration with two Black Berkey BB9-2 elements and two PF-2 fluoride filters. The stainless steel build measures 19.2 inches tall and weighs 6.97 pounds. It requires no electricity or plumbing. This model suits individuals or small households needing portable, countertop filtration for drinking and cooking.
- 1.5-gallon daily capacity for 1-3 people
- Includes PF-2 filters for fluoride and arsenic reduction
- Constructed from durable AISI 304 stainless steel
- No electricity or plumbing installation required
- 1.5-gallon capacity is smaller than other models on the list
- 19.2-inch height is taller than some compact alternatives
- 6.97-pound weight adds bulk for frequent moving
- You live in a dorm or apartment with limited counter space
- You need filtration for fluoride and arsenic removal
- You want a system that requires no permanent installation
- You need a capacity larger than 1.5 gallons for a family
- You prefer a shorter unit that fits under low cabinets
- You require a system with a higher daily output
Verdict: Berkey Travel 1.5 Gal Gravity Filter fits solo users or couples who prioritize fluoride reduction and compact storage over high-volume output.
Big Berkey 2.25 Gal Countertop Filter
Best for: small kitchen counters and low-volume use
- Installation Type
- Countertop
- Material
- Stainless Steel
- Dimensions
- 8.5 × 8.5 × 19.3 inches
This 2.25-gallon gravity-fed system fits on your countertop. It uses authentic Black Berkey Elements to reduce over 250 contaminants without electricity or plumbing. The stainless steel body measures 8.5 by 19.3 inches. Each filter pair handles up to 6,000 gallons. It suits you if you want economical, long-lasting filtration for kitchen use.
- 2.25-gallon capacity for daily drinking water
- Reduces over 250 typical contaminants
- Each filter pair lasts for 6,000 gallons
- No electricity or plumbing required
- 2.25-gallon capacity is smaller than the 3.25-gallon models on this list
- Countertop footprint requires 8.5 by 8.5 inches of space
- You need a compact system for limited counter space
- You want economical filtration with long-lasting filters
- You prefer gravity-fed systems without installation
- You need a larger capacity for high-volume households
- You want a system with a digital display or remote
- You require under-sink installation for hidden storage
Verdict: Big Berkey 2.25 Gal Countertop Filter offers reliable contaminant reduction for small kitchens. It fits you if you value low operating costs and simple setup over high volume.
02 Specifications side by side
| Spec | Big Berkey 2.25 Gal Gravity Filter | Royal Berkey 3.25 Gal Gravity Filter | Royal Berkey 3.25 Gal Stainless Steel | Authentic Black Berkey BB9-2 Replacement Elements | Royal Berkey 3.25 Gal Gravity Filter | Crown Berkey 6 Gallon Countertop Filter | Imperial Berkey 4.5 Gal Stainless Steel | Berkey Travel 1.5 Gal Stainless Steel | Big Berkey 2.25 Gal Countertop Filter |
|---|---|---|---|---|---|---|---|---|---|
| Installation Type | Countertop | Countertop | – | – | Countertop | Countertop | Countertop | Countertop | Countertop |
| Material | Stainless Steel | Stainless Steel | – | – | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Dimensions | 3.35 × 3.35 × 7.58 inches | 9.5 × 9.5 × 23 inches | 9.5 × 9.5 × 23 inches | 3 × 3 × 9 inches | 9.5 × 9.5 × 23 inches | 11 × 11 × 30 inches | 25.8 × 10 × 10 inches | 8.5 × 8.5 × 19.2 inches | 8.5 × 8.5 × 19.3 inches |
| Weight | 7.28 pounds | – | 8 pounds | 1.5 pounds | 9.7 pounds | – | 10.5 pounds | 6.97 pounds | – |
| Size | 2.25 Gal Big Berkey | 3.25 Gal | Royal Berkey System (3.25 Gallons) | 2 Count (Pack of 1) | 3.25 Gallons | 6 Gal Crown Berkey | 4.5 Gal Imperial Berkey | 1.5 gal | pack of 1 |
| Color | Clear | Silver | SILVER | Black | Silver | Silver | Silver | Silver | Silver |
| Model | BK4X2-BB | Royal Berkey | RB4X2-PGF | BB9-2 | RB4X2-BB+PF2 | CRN8X2-BB | IMP6X2-BB | BER-TU2+BER-PF2 | BK4X2-BB |
03 Who Berkey Systems Suit
Berkey’s range covers 1.5 to 6 gallons. The Travel model fits solo users or couples with tight counter space. The 2.25-gallon Big Berkey suits small households. Larger units like the Imperial and Crown handle medium families needing high volume. All listed systems are stainless steel gravity filters. They require no plumbing. You choose based on daily water needs and available height. The lineup lacks under-sink or faucet-mounted options. If you need installed systems, Berkey does not offer them here. Stick with countertop gravity filtration.
04 How to choose the right one
Match capacity to household size
Select a unit based on your daily water needs. The Big Berkey 2.25 Gal Gravity Filter suits small households or apartments where space is limited. Its 2.25-gallon capacity provides enough drinking water without requiring a large footprint. For larger families, consider the Royal Berkey 3.25 Gal or the Crown Berkey 6 Gallon Countertop Filter. These models offer higher volumes to support more users. Check the gallon rating to ensure the system keeps up with your usage patterns.
Consider countertop space and height
Measure your counter area before buying. The Berkey Travel 1.5 Gal Stainless Steel model is compact, with a width of 8.5 inches and a height of 19.2 inches. It fits well in tight spaces or for solo users. In contrast, the Crown Berkey 6 Gallon Countertop Filter stands 30 inches tall with an 11-inch width. Ensure your kitchen counter can accommodate the height and footprint of your chosen model. The Imperial Berkey 4.5 Gal offers a middle ground with a 25.8-inch height.
Check for fluoride reduction needs
If you need to remove fluoride, look for specific filter configurations. The Royal Berkey 3.25 Gal Gravity Filter with the PF2 filter is designed for targeted contaminant removal, including fluoride. This model is ideal for small households prioritizing this specific health benefit. Other models may not include this specific filtration stage by default. Verify the model number and included filters to ensure the system addresses your specific water quality concerns. The Travel model also offers fluoride removal in a compact package.
Verify material and durability
All listed Berkey systems use stainless steel construction for durability. The Royal Berkey 3.25 Gal Stainless Steel model weighs 8 pounds and offers a sturdy build. The Big Berkey 2.25 Gal version weighs 7.28 pounds. Stainless steel resists corrosion and maintains structural integrity over time. Check the weight and material specifications to ensure the unit feels solid. The stainless steel build also contributes to the aesthetic of your kitchen counter while providing long-lasting performance.
Plan for replacement filters
Ensure you have access to compatible replacement elements. The Authentic Black Berkey BB9-2 Replacement Elements are designed for existing Berkey gravity systems. These filters provide long-lasting, high-capacity filtration. Check the model compatibility before purchasing replacements. The BB9-2 elements fit standard Berkey units, ensuring you can maintain your system effectively. Having spare filters ready helps you keep your water clean without interruption. Verify the pack size and quantity to match your usage rate.
05 Frequently asked questions
What is the smallest Berkey system available?
The Berkey Travel 1.5 Gal Gravity Filter is the most compact option listed. It measures 8.5 inches wide and 19.2 inches tall. This model weighs 6.97 pounds, making it easy to store or move. It suits solo users or couples who need fluoride reduction without taking up much counter space.
Which Berkey filter has the largest capacity?
The Crown Berkey 6 Gal Countertop Filter offers the highest volume in this lineup. It stands 30 inches tall with an 11-inch square footprint. This unit is designed for families needing high-volume filtration. It prioritizes capacity and contaminant reduction over a small physical footprint.
Are all Berkey systems installed under the sink?
No, all units in this list are countertop gravity filters. They require no plumbing or professional installation. You simply fill the upper chamber and let gravity pull water through the filters. This makes them ideal for renters or those who cannot modify their kitchen plumbing.
What material are the main chambers made of?
Every system in this guide uses stainless steel for its construction. The Big Berkey, Royal Berkey, and Crown models all feature durable stainless steel tops and bottoms. This material choice ensures longevity and resistance to corrosion, providing a sturdy structure for your daily water filtration needs.
How tall is the standard 3.25-gallon Berkey?
The 3.25-gallon models, including the Royal Berkey variants, stand 23 inches tall. They share a 9.5-inch width and length, creating a square base footprint. This height allows for a large water volume while remaining stable on a standard kitchen counter without being excessively wide.
Can I replace the filter elements in these systems?
Yes, Berkey offers replacement elements for its gravity systems. The Authentic Black Berkey BB9-2 Replacement Elements are available as a pack. These filters are designed to fit existing Berkey units, ensuring you can maintain filtration performance over time without replacing the entire stainless steel assembly.
