Skip to content
Free shipping on purchases of $55 or more

Culligan gravity water filters are universally compatible with most gravity water filter systems, making them an easy upgrade for existing gravity water filter systems.

Culligan Gravity Systems

MaxClear Technology Gravity Filters

Culligan with MaxClear Technology can make your gravity system better

Culligan gravity water filters are universally compatible with almost all gravity water filter systems, making them an easy upgrade for existing gravity filtration setups. With industry leading contaminant reduction certifications, upgrading your current gravity system with MaxClear filters is the easiest way to protect your water.

Unmatched certification for reducing total PFAS, lead, and microplastics

Culligan with MaxClear Technology is designed as a modern Berkey alternative, offering independently certified reduction of microplastics, lead, and total PFAS.
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.

MaxClear filter with box

Never-ending hydration

Stock up on replacement filters to keep your water fresh and flowing.

Replacement Filter

Water you love.™

At Culligan, we’ve been helping people enjoy one of life’s essential resources since 1936.

Our commitment to the highest quality standards and sustainability drives us to develop thoughtfully designed products that ensure your water is cleaner, crisper, and always ready—wherever you need it.

 

That’s why we designed our Culligan with MaxClear Technology filtration systems to meet the highest safety standards, certified by IAPMO. It’s one more way we help you enjoy cleaner water with confidence.

View certification report

MaxClear FAQs

Culligan with MaxClear Technology filters are certified to reduce harmful contaminants, including microplastics, lead, Total PFAS (forever chemicals), pharmaceuticals, pesticides, chlorine, and chloramine.

For the full list of what we reduce, see our performance certifications here

Our filters are made with a ceramic shell, high-flow carbon block, and granular activated carbon. While many competitive filters only use carbon elements, our hybrid approach to water filtration works to effectively reduce harmful contaminants while maintaining a strong flow rate.

Both MaxClear and ZeroWater Technology are certified to reduce harmful contaminants like lead and total PFAS (forever chemicals). But they filter water in different ways:

ZeroWater Technology uses advanced deionization to remove virtually all dissolved solids from your water. This includes metals, salts, and minerals. The 5-stage filtration is also certified to reduce pharmaceuticals and pesticides.

MaxClear uses a powerful ceramic shell with tiny pores to trap contaminants while keeping healthy minerals like calcium and magnesium. MaxClear is also certified to filter microplastics.

Because the technologies are different, some of their certifications vary. To learn more, view their performance certifications here