Frequently Asked Questions

Question on your mind? Answers to common inquiries about the Boroux foundation.™ filter. 

How do the Boroux foundation 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 contaminants are filtered by the Boroux foundation filter?

The latest contaminant reduction test data is available here. Testing is ongoing and test results are being updated regularly.
The Boroux foundation filter is not intended to filter microorganisms.

How long do the Boroux foundation 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 10,000 gallons per pair. See recommendations for other contaminants here.

What are the Boroux foundation filters made of?

A specialized blend of activated carbon.

Are the Boroux foundation filters compatible with other gravity-fed systems?

Yes. The Boroux foundation filter was designed to fit in most gravity-fed systems that hold nine-inch filters. The filter stem fits 3/8 inch holes.

Does the Boroux foundation filter reduce fluoride?

No. However, they are compatible with post-style fluoride filters.

Are the Boroux foundation filters NSF certified?

Not yet. Boroux products are currently undergoing testing to NSF standards to achieve certification. In the interim, actual test results can be found here.

Warranty & Returns

What is the 60-day risk-free trial?

Boroux foundation filters come with a 60-day risk free trial. If for any reason, within 60 days of purchase, you are not satisfied with the filters you can return them for a full refund.

What is the warranty policy?

The Boroux foundation filters are warranted to be free from defects in material and workmanship for one year from the date of purchase. This warranty does not cover failures resulting from abuse, misuse, alteration, damage, or failure to follow installations and use instructions. If the product is defective, we will replace the product. Proof of purchase, description of product, and alleged defect must be provided for a warranty claim.