Big Berkey vs Royal Berkey: Which Size Is Right?

Big Berkey vs Royal Berkey is one of the most common comparisons families make when choosing the right Berkey water filter system for their home.

Both systems offer powerful gravity-fed filtration, stainless steel durability, and trusted contaminant reduction—but size, capacity, and household needs can make one a better fit than the other.

This guide breaks down the key differences so you can confidently choose the Berkey system that fits your family, space, and daily water use.

What’s the Difference Between Big Berkey and Royal Berkey?

The main difference between the Big Berkey and Royal Berkey is water capacity and output volume.

Both systems use the same Black Berkey filter elements and deliver the same level of filtration quality. The difference comes down to how much water they hold and how many people they can support comfortably.

Big Berkey vs Royal Berkey: Capacity Comparison

The Big Berkey holds approximately 2.25 gallons of filtered water, making it ideal for small to medium households.

The Royal Berkey increases capacity to 3.25 gallons, which is better suited for larger families or higher daily water consumption.

Flow Rate Differences: Big vs Royal Berkey

Flow rate depends on how many filter elements are installed and how well they are maintained.

Both systems come standard with two filters but can be expanded to four for faster filtration.

If you notice slow filtration, common causes include air trapped in the filters, mineral buildup, or improper priming. We explain how to fix this step-by-step in our guide: Berkey Flow Rate Slow? 7 Common Causes & How to Fix It Fast.

Counter Space & Height Considerations

If counter space is limited, the Big Berkey has a smaller footprint and slightly shorter height, making it easier to fit in compact kitchens or RVs.

The Royal Berkey requires more vertical clearance and counter space but offers greater water storage in return.

Big Berkey vs Royal Berkey: Which Is Best for Your Family Size?

Choose the Big Berkey if:

• You have 1–4 people in your household
• Limited counter space
• Moderate daily water usage

Choose the Royal Berkey if:

• You have 4–6 people
• Higher daily water consumption
• Want fewer refills throughout the day

Cost Comparison: Big Berkey vs Royal Berkey

The Big Berkey is typically more affordable upfront.

The Royal Berkey costs more due to its larger size but can be more convenient for families that consume more filtered water daily.

Both systems use the same replacement elements, so long-term filter costs remain similar.

Big Berkey vs Royal Berkey Comparison Table

Certified Filtration & Testing Standards

Berkey filtration systems are independently tested for contaminant reduction using established laboratory standards.

You can learn more about water filtration testing frameworks and NSF/ANSI standards directly from the National Sanitation Foundation (NSF).

Which One Should You Choose?

If you want a compact, efficient system for everyday use, the Big Berkey is an excellent choice.

If your household uses more water daily or you want fewer refills, the Royal Berkey offers added convenience.

Both systems deliver the same trusted filtration—your decision comes down to space and usage.

Frequently Asked Questions

Is the Royal Berkey better than the Big Berkey?

The Royal Berkey is not better in filtration quality—it simply holds more water and supports higher daily usage.

Do Big Berkey and Royal Berkey use the same filters?

Yes, both systems use Black Berkey elements and optional fluoride filters.

Which Berkey is best for a family of four?

Either can work, but families with higher water usage often prefer the Royal Berkey.