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Upgrade to MaxClear for advanced filtration

Keep your ProOne system. Enhance your protection.

  • Price reduced
    Scout 2.25 Gallon Gravity Countertop System Scout 2.25 Gallon Gravity Countertop System - Hover
    MaxClear Technology

    Scout 2.25 Gallon Gravity Countertop System

    For smaller households (1-3 people)
    From
  • Price reduced
    Venture 3 Gallon Gravity Countertop System Venture 3 Gallon Gravity Countertop System - Hover
    MaxClear Technology

    Venture 3 Gallon Gravity Countertop System

    For larger households (4+ people)
    From
  • Gravity Water Filter Gravity Water Filter - Hover
    MaxClear Technology

    Gravity Water Filter

    Compatible with most gravity filtration systems
    From

Unmatched certification for reducing total PFAS, lead, and microplastics

Certified to reduce Brand 1 Brand 2 Brand 3 Brand 4
Microplastics
Lead
Total PFAS
Chlorine
Chloramine
Pharmaceuticals
Pesticides

This table represents certified contaminant reduction. The results presented are sourced from the available certification data for BOROUX® Foundation™ Black Filters and Berkey® Black Berkey®(BB9-2) Water Filters. As of 7/15/2025 BOROUX® and Berkey® Performance Data Sheets.

Real customers, real results

Culligan and ProOne

As the global leader in water filtration, Culligan is dedicated to delivering safer, cleaner water for everyone, everywhere. By combining ProOne’s innovative spirit with Culligan’s 90-year legacy of water science and trusted service we can use both our strengths to bring you even better water filtration products. Over the past 18 months, we've been working diligently to create a new gravity filtration product with additional certifications: Culligan with MaxClear Technology. 

ProOne products will be available only while current inventory lasts, after which you’ll find their updated versions in Culligan with MaxClear Technology. This means the same trusted performance you know from ProOne—now backed by Culligan’s global water expertise.

As part of the transition, we’ve simplified our product lineup and will only offer our 7” filter – the most popular and versatile size – going forward. This allows us to deliver the same trusted quality with even greater consistency and performance. 

In Culligan with MaxClear™ Technology, we’ve taken your ProOne filter to the next level. The new filters still remove microplastics, lead, and total PFAS, but now they're certified to filter pharmaceuticals and pesticides too.

Yes! Culligan with MaxClear™ Technology filters are designed to fit and function seamlessly with your existing gravity system. In addition to most other branded systems like Berkey, Boroux, Purewell and Waterdrop, our new 7" filters will fit in the following ProOne devices:

  • Big+
  • Traveler+
  • Big II
  • Propur King
  • Propur Big
  • Propur Traveler
  • Propur Nomad

No. Our goal is to keep high-quality water filtration accessible for everyone. While we've introduced a new product, our commitment to balancing quality, performance, and affordability remains the same. With Culligan’s global resources and decades of water expertise, we’re proud to offer advanced filtration at a fair price—so you can continue to enjoy cleaner, safer water without paying more. 

ProOne customers now get Culligan’s best-in-class customer care team, who will provide fast help and clear solutions to any questions you may have. If you need support or have any questions about ProOne or the new Culligan with MaxClear™ Technology products, you can call us at (800) 503-2939 or email help@culligan.com.