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Enhance the functionality of your legacy system with the BOROUX stand. Its 6 inches height allows easy cup or bottle filling. The non-marking rubberized feet protect your surfaces while ensuring stability.
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The Legacy 3 gallon was designed to be the perfect size for most households. But how many filters do you need?
2 Filter Configuration is ideal for up to 4 people if you fill it once daily (approximately 100 ounces per person). If you refill it multiple times throughout the day, it can serve even more users.
4 Filter Configuration (2x Faster Filtering) is perfect for larger families or up to 8 users, or for those with above-average water use (approximately 100 ounces per person, per day, filled twice daily). This configuration is also ideal if you use filtered water for cooking, watering plants, pets and other household needs.

Set of 2

BOROUX foundation.™ Black Filters Multi-Pack

$160 $120 Sale

Upgrade your water filtration with foundation Black Filters, designed for seamless compatibility with the BOROUX legacy as well as other popular water filtration systems, including Berkey® and ProOne®. Engineered for endurance, each filter boasts a remarkable lifespan of up to 6,000 gallons, or an impressive 12,000 gallons per pair. Reinforced with our innovative Stem Saver technology, these filters offer enhanced durability, ensuring years of reliable service even under the rigors of regular handling and cleaning.

And now, with our exclusive Buy More, Save More offer, you can enjoy refreshing water for less. Stock up and save up to $200 on your purchase—because investing in better water shouldn’t break the bank. Keep your family hydrated with the unparalleled performance of BOROUX.

This product is not eligible for discount codes.

Select & Save Options: Set of 2 Filters

Pickup available at 1981 Aspen Circle

Usually ready in 4 hours

Key Features
Compatibility

The BOROUX foundation.™ filter is meticulously designed to seamlessly integrate with most gravity-fed water filtration systems including Berkey®, ProOne®, Alexapure Pro, Doulton, Patriot Pure Ultimate, and more. Whether it's refreshing your existing setup or initiating a new journey in water wellness, the filters have been crafted for broad compatibility with gravity-fed systems.

Full compatibility details here

Product information

We offer free shipping on all orders over $60 to the U.S. and Canada.

Boroux encourages customers to test products once they are received. For this reason, we accept returns of products in new or used condition. If you are not satisfied with the purchase for any reason, within 60 days of receiving the package, please get in touch with Customer Service.

Simplicity

The lowercase styling of 'foundation.' in our name speaks to the inherent simplicity of BOROUX. By choosing 'foundation', we reflect the straightforward and essential nature of our water filtration solutions—designed to be uncomplicated and accessible.

Finality

The period at the end of "foundation." symbolizes finality and completeness. It's a subtle way of saying that BOROUX foundation. is the definitive answer to water filtration needs. It's a complete solution, and there's nothing more to add – it's the final word in water filtration.

Grounded

Just as the name "foundation." is grounded (with the period acting as an anchor), BOROUX is grounded in nature and its commitment to the environment. The name resonates with the brand's dedication to being a reliable foundation for filtered water solutions.

Rigorous Performance, Verified Data

Each filter created is a testament to a firm commitment to transparency. Undergoing meticulous testing procedures, the filters come with verified performance data that guarantee you receive water filtration you can count on. This product was designed exclusively to enhance municipal tap water. With each drop filtered, rest assured, you're enjoying the pinnacle of water filtration.

Reinforced Stem Saver™ Design

Recognizing the challenges of filter handling and maintenance, the BOROUX foundation.™ have been re-engineered with the innovative Stem Saver™. This advancement fortifies the most vulnerable part of the filter—its stem—against breakage, ensuring it can endure the rigors of regular cleaning and handling.

Uncompromising Quality, Direct to You

The BOROUX foundation.™ stands out by offering premium filtration directly to your doorstep. Eliminating middlemen ensures that each filter is a blend of top-notch quality and value. This direct-to-consumer approach provides superior hydration without the premium cost.

Designed for Universal Fit

Our filter is meticulously designed to seamlessly integrate with most gravity-fed water filtration systems. Whether it's refreshing your existing setup or initiating a new journey in water wellness, the filters have been crafted for adaptability.

Specifications

Filter Capacity  Up to 12,000 gallons per pair depending on the quality of the influent water.*
View test results here.
Dimensions 2.75” x 2.75” x 9.75”
Composition Filters are comprised of a specialized blend of activated carbon. The BOROUX foundation filters contain silver, an antimicrobial agent, to prevent microorganisms from degrading the product itself. This filter is not intended to filter microorganisms.
Compatibility

Fits most gravity-fed water filtration systems and fluoride filters.

Warranty Coverage  BOROUX foundation filters are protected by a 1-year quality warranty. For further details on our warranty provisions, please contact customer support.
Maintenance  Scrub the BOROUX foundation filters every 3-6 months. Using an abrasive scouring pad, carefully scrub the surface of the filters for several minutes. DO NOT use soap or detergents on the filters. Re-prime the filters, install, and perform the red dye test to ensure proper installation of the filters. 
Replacement Filter  BOROUX foundation filter / Model BX·FND9·2
Box Includes
  • Two BOROUX foundation filters
  • Blue Priming Tool
  • Red Dye Test Solution
  • Tan Priming Tool
  • Product Insert

*Based on independent testing for the reduction of chlorine at 6,000 gallons per filter. While testing was performed under standard laboratory conditions, actual performance may vary. The contaminants or other substances removed or reduced by these filters are not necessarily in all users' water. Filter performance may vary based on local water conditions.

Compatible Water Systems

The BOROUX foundation.™ is designed with versatility in mind, fitting seamlessly with a range of systems. Below is a list of popular systems the filters fit in.

System Model
Berkey® Travel Berkey®
Big Berkey®
Berkey Light®
Royal Berkey®
Imperial Berkey®
Crown Berkey
AlexaPure® AlexaPure Pro®
Aquacera® Terra2
Doulton® PioneerTM SS4
LP4
Patriot Pure Patriot Pure Ultimate
ProOne® Big+
Big II
Waterdrop®  Waterdrop® King Tank

Don’t see your system listed? We’re here to help determine compatibility. Your feedback helps us expand our list of compatible systems. If you don't see your filtration system model, please send us an email at contact@boroux.com with the make, model, filter housing dimensions, and any other important specifications.

Frequently Asked Questions

How long do the filters last?

The filter lifespan will vary depending on the source water and contamination level. The recommendation for when to replace depends on several factors. For example, for filtering chlorine, the filters last for 12,000 gallons per pair. See recommendations for other contaminants.

How do the filters work?

BOROUX foundation filters work by absorbing and trapping contaminant molecules. The carbon attracts and absorbs molecules with a certain chemical charge. They stick to the carbon, like how a magnet attracts metal. The tiny pores of the carbon block are so small that they physically block and trap tiny particles. It's similar to a sieve or strainer.

What is the BOROUX filter made of?

A specialized blend of activated carbon.

More FAQS here

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Our Story

Building on the legacy of 25 years in the water filter industry, BOROUX embraces innovation and ethical practices. We are committed to quality water. Every drop we filter is a testament to enhancing your well-being. Our dedication to better products, better practices, and better communication leads to you getting better water. BOROUX is the clear choice for hydration.

Learn More About Us
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