Certified
Worry-Free Water
Guaranteed

Name: BOROUX foundation.™ Black Filters - California Compliant
Brand: BOROUX
SKU: BX-FND9-2-CA
Price: 140.0 USD
Availability: InStock

Peace of mind with every drop.

1 4

Set of 2

BOROUX foundation.™ Black Filters - California Compliant

~~$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)¹. 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
Up to 12,000 gallon filter lifespan¹
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. 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.

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. Our California Compliant BOROUX foundation.™ filters address the chlorine, chloramines, microplastics, and Class 1 Nominal Particulates in your water, ensuring your water is as pristine and refreshing as nature intended.

Disinfectant Reduction¹

While disinfection is essential for killing harmful microbes in water, the process can 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

Disinfectants can increase the risk of cancer and reproductive issues. Filtering these contaminants ensures optimal drinking water quality.

Common Contaminants

Chloramine (respiratory issues)
Chlorine (digestive problems)

Learn More About Disinfectants

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

ML, Round Rock, TX

Microplastics and Nominal Particulate Class I Average Reduction Up to 98.9%¹

Microplastics, particulates and chlorine 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 these 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

Microplastics(BPA) (hormone disruptor)
Class I Particulates (digestive problems)

Learn More About These Toxins

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

Certifications	NSF/ANSI/CAN 372 certified by WQA†
Filter Capacity	Up to 12,000 gallons per pair ¹
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·CA
Box Includes	Two BOROUX foundation filters Blue Priming Tool Red Dye Test Solution Tan Priming Tool Product Insert

† - NSF/ANSI/CAN 372 Lead Free for BOROUX foundation filters used in BOROUX legacy compact system.

¹ - Based on Verified Third Party Filtration Performance 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 reduced by these filters are not necessarily in all users' water. Filter performance may vary based on local water conditions.

Important WARNING for California residents

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.

What is the BOROUX filter made of?

A specialized blend of activated carbon.

What contaminants are filtered by the BOROUX foundation filter?

The BOROUX foundation filters will filters chlorine, chloramine, microplastics, and Nominal Particulate Class 1.

Why is there a separate BOROUX foundation filter for California and Iowa?

To comply with local regulations in Iowa and California we had to provide a filter that only addresses chlorine, chloramine, microplastics, and Class 1 Nominal Particulates.

Certified
Worry-Free Water
Guaranteed