Boroux FAQ

BOROUX Foundation Filters work by absorbing and trapping contaminant molecules. The activated 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.

Heavy metals, pharmaceuticals, pesticides and more. See the full list with the test results to prove it.

We recommend replacing a pair of BOROUX Foundation Filters every 12 months. Filter lifespan will vary depending on source water quality and usage.
A pair of filters is warrantied and guaranteed to effectively filter for 12 months.

A specialized blend of activated carbon.

Proudly crafted in the USA!
The plastic Stem Saver™ is sourced from China.

Yes. The BOROUX Foundation Filter is compatible most gravity-fed systems.

No. However, the BOROUX Proactive Filters do filter fluoride!

The BOROUX Foundation Filters is certified to NSF/ANSI 42, NSF/ANSI/CAN 401, and NSF/ANSI/CAN 372 by the Water Quality Assosciation (WQA).

You might notice a subtle earthy or mineral-like taste when first using your new BOROUX Proactive Fluoride Filters—this is completely normal and temporary.

Our filters use high-performance filtration media that may initially impart a harmless taste. To eliminate this, we recommend priming each filter for at least 10 minutes using higher water pressure before installing. In our testing, this method has resolved the taste issue 100% of the time.

For the most effective priming experience, use the blue silicone primer tool included with your filter. It helps fully flush the media and ensures your water tastes clean and crisp from the start.

Yes, our BOROUX Proactive Fluoride Filters are designed to be fully compatible with Berkey® systems. They attach directly to the lower chamber of most standard gravity-fed filtration units. This allows you to continue using your existing setup while benefiting from BOROUX’s advanced fluoride-reducing technology.

However, we always recommend confirming thread size and chamber fit for your specific model to ensure seamless installation.

The first stage of filtering happens when the water passes through the tried-and-true, activated-carbon BOROUX Foundation Filter. The BOROUX Proactive Filter threads onto and attaches to the stem of the black BOROUX Foundation Filter. The second stage of filtration occurs when the water passes through the dual-action BOROUX Proactive Filter.

After passing through the filters in the upper chamber, water first comes in contact with the inner layer of high-efficiency granulated carbon filters in the lower chamber. Then, the water filters through the proprietary nano-carbon outer layer. With the patent-pending Upflow Design of the stainless steel shell, the water stays in contact with the outer layer for a prolonged period of time, providing superior filtration. The filtered water exits the top of the shell through the outlet holes. This allows for a nearly uniform use of the entire surface of the fluoride filters, from bottom to top.

We have not yet tested for arsenic.

The filter lifespan will vary depending on the source water, and usage. It’s recommended to replace filters at 3,785 litres (1,000 gallons), which is approximately 6-12 months.

The BOROUX Proactive Fluoride Filter has two distinct layers. The inner layer is granulated carbon–small, loose granules of a mix of different carbons are packed into the center of the cylinder filter. The outer layer of the filter is a nano-carbon. This blend of specialized carbon is molded into shape.

Proudly crafted in the USA!

Yes, you’ll need one BOROUX Proactive Fluoride Filter for each BOROUX Foundation™ Filter in your system. The Proactive Fluoride Filters are designed as a 1-to-1 companion product, meaning each fluoride filter connects directly to one Foundation™ Filter.

This ensures balanced flow, proper filtration performance, and maximized fluoride reduction across your entire system.

Yes, the stainless steel shell is essential for proper performance. It supports ourupflow design, which directs water from the bottom up—slowing the flow rate and increasing contact time between water and filtration media. This optimized interaction enhances fluoride reduction and overall effectiveness.

BOROUX Proactive Fluoride Filters are not available to ship to California or Iowa due to state-specific regulations and compliance requirements. These states have unique laws regarding the sale of water filtration products that make certain contaminant reduction claims.

We’re actively working to meet the necessary certification standards so we can make these filters available to residents in both states in the future.

The BOROUX Legacy systems are a gravity-fed water filter. It has one upper chamber and one lower chamber. The BOROUX Foundation Filters are installed in the upper chamber. The optional BOROUX Proactive Filters attach the stem of Foundation Filters and hang in the lower chamber. Water is poured into the upper chamber, and then gravity pulls the water down through the BOROUX Foundation Filters and into the lower chamber. Drinking water can then be poured out from a spigot located at the base of the lower chamber.

• Reliable performance from the included BOROUX Foundation Filters. Every system comes standard with two Foundation Filters assuring peace of mind through trusted technology, backed by real-world, verified testing.
• Simple design. Sometimes the best innovation and design philosophy is to simplify. The legacy system boasts, seamless one-piece 304 AISI stainless steel chambers with built-in vents to prevent airlocks; a domed low-profile, single-piece lid for a sleeker look and less parts to prevent rusting; and a stainless steel spigot with a ceramic valve for smooth and fast flow.
• You’re getting more than a product, you’re getting an entire team dedicated to supporting your personalized water wellness journey. We’re here to help you through every step of your journey and have tools in place to best serve your water filtering needs.

• Chambers and spigot is 304 AISI stainless steel, which is food-grade quality and highly corrosion-resistant.
• Foundation Filters are activated carbon blocks
• Stem Saver and hole plugs are BPA-free food-grade plastic
• Base ring and washers are silicone

All BOROUX products are designed in Colorado. The stainless steel elements are sourced from a highly reputable, technologically-advanced factory in China.

Yes, stainless steel can rust, although it is less likely to do so compared to other types of steel. Stainless steel contains chromium, which forms a protective oxide layer on its surface that helps prevent corrosion. However, if this protective layer is damaged or if the stainless steel is exposed to harsh environmental conditions, such as high levels of humidity or chloride-containing substances, it can still rust. Regular maintenance and proper care can help prevent rusting in stainless steel.

Clean the stainless steel chambers and spigot monthly with dish soap and warm water.

Clean Foundation Filters every 3-6 month with water and an abrasive sponge.

On a full charge, you can prime a minimum of 10 filters before needing to recharge the pump.
It takes approximately 90 seconds to fully prime one filter.

The light on your Priming Pump helps you quickly understand the current battery status. Here’s what each light color and behavior means:

• Solid Green: Fully charged and ready to use
• Blinking Green: Currently charging
• Blinking Red: Battery level is below 25% — charge soon
• Solid Red / No Light / Blank: Battery is critically low or depleted — needs to be charged immediately

If you’re unsure whether the pump is working correctly, we recommend fully charging it and checking the light again.

No, the Priming Pump is not waterproof. Do not fully submerge the Priming Pump in water.

Yes. The Priming Pump is compatible with Black Berkey Filters as well as BOROUX Foundation and Proactive Fluoride Filters (adapter included with fluoride filters).

On the contrary—using the Priming Pump helps ensure complete and consistent priming, actually extending your filter’s lifespan and optimizing filtration performance.

Improper priming can lead to cloudy water, reduced flow rate, uneven filtration, and a shorter filter lifespan. The Priming Pump ensures consistent, proper priming for optimal filter performance.

• the new Automatic Priming Pump
• using a plastic water bottle Watch Video
• soaking your filter overnight Watch Video
• scrubbing your filter Watch Video

A failed red dye test could indicate incorrect installation. Double check the placement of wingnuts and washers.

It’s normal for 1-2 inches of water to remain in the upper chamber. Because the legacy system is a gravity-fed water filter, it relies on the pressure and weight of water to push down and through the filters. As it empties into the lower chamber, there’s less weight to push it down. Also, water cannot pass through the plastic Stem Saver.

White residue is mineral buildup. It is harmless. If visible on your black filter, run under water and wipe off. If visible on your chamber or spigot, use a mixture of half water and half vinegar to scrub off. You can soak the spigot in this mixture.

If your system is leaking at the spigot, check for correct installation.

If your system is leaking where the two chambers meet, you’re overfilling your system. Only fill the top chamber if the lower chamber is empty.