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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.
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California Proposition 65 warning

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

BOROUX Automatic Filter Primer

$40.00 USD

The BOROUX Automatic Filter Primer simplifies the priming process for BOROUX filters, transforming a tedious task into a quick and effortless 90-second process. On a full charge the Primer works for a minimum of 10 filter priming cycles. Quickly and efficiently prime your filters with no need for the correct-sized faucet or risk of getting sprayed. The filters fit into the Primer, press a button, and voilá! Enjoy clean, clear water from the very first use.

Key Features
  • Compact and easy-to-use design
  • Completes priming in just 90 seconds
  • Battery-powered with USB-C charging
  • Minimum of 10 filter priming cycles on full charge
  • ETL-tested for compliance
  • Patent Pending
Compatibility
  • BOROUX Foundation™ Filters
  • BOROUX Proactive™ Fluoride Filter
  • Black Berkey® Filter

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.

Convenient & Mess-free

Hassle-free priming without splashes or spills at the push of a button.

Primes in just 90 secs

Completely primes a single filter in just 90 seconds.

Battery Powered

The Primer is battery-powered with USB-C charging.

Primes 10 filters/charge

On a full charge the Primer can do a minimum of 10 filter priming cycles.

How To Use

The BOROUX Automatic Filter Primer is designed to work with the Boroux Foundation Filter, the Boroux Proactive Fluoride Filter and the Black Berkey Filter.

The below steps show how to prime the Foundation Filter using the Primer.

1
Step 1

Set Up the Filter

Take the filter and remove the wing nut (leave the washer in place), and attach the filter to the primer. Rotate until snug — hand tighten only.

2
Step 2

Start Priming

Place the primer and filter in the lower chamber and hook it securely. Fill with water to the marked level on the primer, then press “On” and “Prime.” The primer will automatically stop when done.

3
Step 3

Final Check

Remove the filter and ensure the washer is secure. Repeat for each filter. If the water isn't clear, re-prime the filter.

Why Proper Priming Matters

The BOROUX Automatic Filter Primer helps safeguard against improper filter priming which can lead to:

Cloudy Water and Reduced Flow Rate

A partially primed filter typically has a slow and inconsistent flow, which is not only frustrating but can also indicate that the filtration process isn’t working efficiently.

Incomplete Saturation of Carbon Media

Activated carbon is porous and needs to be fully saturated with water to function properly. If it isn’t, air pockets can block flow and reduce the surface area available for adsorption, drastically reducing the filter's effectiveness.

Channeling Effect

Without proper priming, water can flow unevenly through the filter, creating channels that bypass much of the carbon media. This undermines contaminant removal and shortens the effective lifespan of the filter.

Specifications

Dimensions 8.37" x 3.37"
Primer Cycle Time 90 seconds
Battery Life (full charge) 10 filter priming cycles (minimum)
Charging Cable USB-A to USB-C (included)
Wall Adapter USB-A (not included)
Battery (not user serviceable) 1200 mAh, 3.7 V, 4.44 Wh
Filter Compatibility
Warranty Coverage The Primer is covered by a 1 year limited warranty.
Box Includes
  • One BOROUX Automatic Filter Primer
  • One USB-A to USB-C charging cable
Compliance
  • FCC Part 19 Subpart B (Class B)
  • RoHS as per 2011/65/EU Annex II amending Annex (EU) 2015/863
  • CE 

Frequently Asked Questions

How many filters can I prime per battery charge?

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.

What do the different light indicators on the Primer mean?

The light on your Primer 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 primer is working correctly, we recommend fully charging it and checking the light again.

Is the BOROUX Automatic Filter Primer water proof?

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

Why won’t my primer turn on even though it’s fully charged?

If your BOROUX Automatic Filter Primer is showing a green light but won’t power on, please try the following troubleshooting steps:
Press and hold the power button: Ensure you’re pressing and holding the button firmly rather than tapping it.
Listen for sounds or vibration: When attempting to start the primer, check if there’s any noise or vibration—this could indicate the motor is trying to run.
Check for blockages: Inspect the primer for any visible obstructions or debris that might be preventing it from operating properly.


If you’ve checked all the above and the primer still doesn’t respond, please reach out to our support team for further assistance.

Is the BOROUX Automatic Filter Primer compatible with Berkey filters?

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

Will using the BOROUX Automatic Filter Primer reduce filter lifespan or performance?

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

What happens if a filter isn't primed properly?

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

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