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Worry-Free Water
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BOROUX foundation.™ Black Filters

~~$160 USD~~ $140 USD Sale

BOROUX foundation black filters are compatible with popular water filtration systems. They ensure years of reliable service with a lifespan of up to 6,000 gallons per filter (12,000 gallons per pair). The filters, equipped with Stem Saver technology, are reinforced for added durability during handling and cleaning.

HSA/FSA Eligible at Checkout.

Select & Save Options: Set of 2 Filters

Set of 2 Filters

$140$160

Set of 4 Filters

10% off in cart

$280$320

Set of 6 Filters

15% off in cart

$420$480

Set of 8 Filters

20% off in cart

$560$640

Product variants

Key Features

NSF/ANSI/CAN 372 certified by WQA†
Verified Third Party Filtration Performance. See Test Results
12,000 gallons capacity¹
Reinforced Stem Saver™ design for durability
Compatible with popular gravity-fed filters
Uncompromising quality, direct to you

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.

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.

3rd Party Lab-Verified

Peace of mind knowing your water is always pristine.

Trusted for 20+ Years

Experience and expertise you can always rely on.

Filters Up to 12,000 Gallons¹

Less frequent replacements, providing more savings.

Dedicated Customer Support

Confidence in making informed decisions about your water.

Certified for Your Family’s Health

Independently tested to meet NSF/ANSI/CAN standards, the highest level of trust in water filtration.

Lead-Free Guarantee (NSF/ANSI/CAN 372)
Certified lead-free materials to keep your water worry-free.

Verified Performance
Certified by WQA to meet strict safety and quality standards.

See the Full Certification Details

Advanced Filtration for a Healthier Home

Our state-of-the-art filtration technology doesn’t just filter water; it transforms it. By removing up to 99.97% of harmful contaminants, BOROUX foundation.™ filters ensures your water is as pristine and refreshing as nature intended. Explore the specific contaminants our filters eliminate and learn how each removal enhances your health and well-being.

Heavy Metals Contaminant Removal Up to 99.4%¹

Heavy metals can enter your water from corroded pipes, industrial waste, and natural deposits. They often go unnoticed but pose significant health risks over time.

Health Risks

Heavy metal toxicity can cause neurological issues, developmental problems in children, and damage to vital organs. Removing these metals is crucial for maintaining overall health.

Common Contaminants

Lead (neurodevelopmental issues)
Mercury (brain and kidney damage)
Cadmium (kidney damage)
Chromium (skin irritation and ulcers)
Uranium (kidney toxicity)

Learn More About Heavy Metals

“The water tastes great and it's much healthier than tap water”

Linda Davis, Los Angeles, TX

Disinfection Byproduct Removal Up to 99.7%¹

While disinfection is essential for killing harmful microbes in water, the process can create byproducts that pose potential health risks commonly found in treated municipal water supplies. They form when chlorine or other disinfectants react with natural organic matter.

Health Risks

Disinfection byproducts can increase the risk of cancer and reproductive issues. Removing these byproducts ensures optimal drinking water quality.

Common Contaminants

Trihalomethanes (THMs) (cancer risk)
Haloacetonitriles (HANs) (genotoxic effects)
Chloramine (respiratory issues)
Bromodichloromethane (liver and kidney damage)
Chloroform (central nervous system effects)

Learn More About Disinfection Byproducts

"The best part is that our water now tastes perfect. It tastes as water should."

ML, Round Rock, TX

Industrial Toxins Removal Up to 99.6%¹

Industrial toxins can enter your water through runoff from manufacturing plants, plastic degradation, and other industrial activities. They are pervasive in urban and industrial areas.

Health Risks

Exposure to industrial toxins can cause a range of health problems including cancers, hormonal disruptions, and organ damage. Ensuring your water is free from these toxins protects your long-term health.

Common Contaminants

Benzene (linked to anemia and leukemia)
Bisphenol A (BPA) (hormone disruptor)
Chlorine (digestive problems)
Trichloroethylene (TCE) (liver and kidney damage)
Polyfluoroalkyl substances (PFAS) (immune system effects)

Learn More About Industrial Toxins

“I'm so glad that you're conducting ongoing testing on your filters and posting the results for consumers to see.”

Jennifer Andrew, Denver, CO

Pesticides, Herbicides, Insecticide Removal Up to 99.9%¹

These chemicals are widely used in agriculture and pest control, but they can also contaminate water sources, posing risks to human health.

Health Risks

Exposure to pesticides, herbicides, and insecticides can increase the risk of cancer, disrupt endocrine function, and cause other health problems. Filtering these chemicals is crucial for high-quality drinking water.

Common Contaminants

DEET (neurotoxic effects)
Glyphosate (cancer risk)
Heptachlor (liver damage)
Lindane (nervous system effects)
Methoxychlor (reproductive effects)

Learn More About Pesticides and Herbicides

"The water at our home always tasted off. Ever sense we got our filters it’s great! My three year old daughter continually asked for water now! It’s a real game changer!"

Max Layton, Pueblo, CO

Volatile Organic Compounds (VOCs) Removal Up to 99.9%¹

VOCs are chemicals released from household products like paints, cleaning supplies, and solvents. They can easily contaminate water sources and pose a risk to your health.

Health Risks

VOC exposure can cause headaches, nausea, and long-term damage to the liver and kidneys. Some VOCs are known carcinogens, making their removal essential for safe drinking water.

Common Contaminants

Chloroform (central nervous system effects)
Carbon tetrachloride (liver damage)
Toluene (nervous system damage)
Xylenes (respiratory issues)
Ethylbenzene (kidney and liver damage)

Learn More About VOCs

“The filters have work just as they said, very good drinking water.”

Virgil Schmidt, Carlisle, IN

Pharmaceutical Contaminant Removal Up to 99.5%¹

Pharmaceutical residues, including medications and personal care products, can enter water sources through human and animal excretion, improper disposal of medications, and runoff from pharmaceutical manufacturing.

Health Risks

Long-term exposure to pharmaceutical contaminants can lead to antibiotic resistance and other health problems. Removing these substances helps maintain pristine water quality.

Common Contaminants

Estrone (hormonal effects)
Ibuprofen (digestive issues)
Naproxen (digestive and kidney issues)
Phenytoin (nervous system effects)
Meprobamate (sedative effects)

Learn More About Pharmaceuticals

Invest in Your Family’s Health and Well-Being.

Choose BOROUX foundation.™ Filters for high-quality, refreshing water.

Shop Now and Safeguard Your Family

Specifications

Filter Capacity	Up to 12,000 gallons per pair depending on the quality of the influent water. ¹ V iew 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

¹ - 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

What certifications do the BOROUX foundation filters have?

The BOROUX foundation filters carries a certification for NSF/ANSI/CAN 372 Lead-Free when used in any system. The BOROUX foundation filters are currently undergoing testing for additional certifications. All of the certicate testing is performed by the Water Quality Assosciation (WQA).

How do the BOROUX foundation filters work?

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.

What is the BOROUX filter made of?

A specialized blend of activated carbon.

What contaminants are filtered by the BOROUX foundation filter?

See the full list and the latest contaminant test results. Testing is ongoing and data is updated regularly.
The BOROUX foundation filter is not intended to filter microorganisms.

DELICIOUS!

As soon as the first sip of water from these new filters I feel in love with my water filter system all over again! Thank you!

Thanks so much for your review! We're so happy to hear that you're enjoying the water from your BOROUX foundation filters! Our team is glad to provide products to help you along in your journey for personalized water wellness. Happy hydrating!

Loved finding these. My berkey needed new filters and these are ideal

We're so happy to hear that you loved our BOROUX foundation flters for your system! We strive to provide the best quality products for our customers. Thank you for choosing us for your filter needs. Have a great day!

A light rain

So glad Boroux came through with filters for my Berkey. They’re easy to prime and the sound of filtering water makes me want to take a nap.

Thank you for your review. We're so happy to hear that the BOROUX foundation filters have worked well in your system! Our team is working on making the priming process even easier for you in the future! Thank you for choosing Boroux!

I'm happy to have new filters again! We waited so long to get new filters, so we're excited to have fast flowing water again. Lots of good tasting water :)

We're thrilled to hear that our BOROUX foundation™ Black Filters have made a positive difference for you. Thank you for taking the time to share your experience with us.

Excellent Product

These black filters work beautifully, and more efficiently than my original Berkey Black Filters. I couldn't be happier.

Certified
Worry-Free Water
Guaranteed