Culligan & ProOne FAQs

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.