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Do you want the best? The Big has a 3.0-gallon capacity and is made of high-quality stainless steel. ProOne is the only gravity filter that is as effective as counter top and under counter water filters at removing contaminants from your water

The ProOne Big is not only is a great way to filter your tap water at home, it is also ideal for camping. 

The ProOne Big water filter allows you to add a third filter. While the Big filter comes with one 7" ProOne G2.0 filter, you can opt for two 7" filters or three 9" filters for even faster flow rate and higher water volume. The ProOne G2.0 filter is the only fully tested, documented and NSF component certified gravity filter element. 

Assembled in the USA.

This filter is independently tested and certified to reduce and remove a broad range of over 200 contaminants including:

    • VOCs
    • Lead
    • Fluoride
    • Heavy metals
    • Pesticides
    • SVCs
    • Disinfectants (ex. Chlorine, Chloramine)
    • Inorganic non-metallics
    • Herbicides
    • Pharmaceuticals
    • PFOA
    • Micro-organisms
    • 1,4 Dioxane
    • Micro Plastics

This filter technology is as effective at removing contaminants as a reverse osmosis water filter system.

Tested by a certified third-party lab to meet NSF 42, NSF 53, and NSF P231 standards. Review third-party lab test results here

Features of the ProOne Stainless Steel Gravity Water Filter

    • 3.0-gallon water storage capacity 
    • High quality 304 polished stainless steel with stand
    • Solid 304 Stainless Steel spigot (Optional sight glass spigot can be purchased that allows a view of water level. Click here to view.)
    • Dimensions: 9.25" x 22.75"
    • Includes one 7" ProOne® G2.0 filter, although you may upgrade to two 7" filters or three 9" filters for faster flow
    • Simple to assemble and use
    • Filter life: up to 6 months with 1 filter, up to 1 year with 2 filters and up to 18 months with 3 filters
    • Assembled in the USA

What Makes this Water Filter so Special

    • As effective as a Reverse Osmosis water filter system
    • Does not remove minerals from your water like Reverse Osmosis water filters
    • Removes/reduces fluoride and over 200 water contaminants (see lab reports below)
    • Tested by an independent, certified third-party lab
    • No priming required
    • Easy to clean

Tested by a Third-Party Lab

This filter was tested by a certified lab. Read the test results by clicking here.


Does TDS measure water quality?

The answer is no. A TDS meter simply measures dissolved solids in water, NOT dissolved contaminants. A higher TDS can simply be high calcium or mineral content.

A TDS meter is not recognized in the industry as a proper means of testing water for contaminants. They were created years ago by the manufacturers of reverse osmosis systems as a means of demonstrating the effectiveness of RO which removes most if not all minerals.

    Return Policy:

    If not satisfied, return the filter in the original packaging within 30 days of receipt for a full refund less return shipping costs.

    Shipping Information:

    Ships FREE via UPS and typically arrives within 4-8 business days.

    Have more questions? Call us at 1-800-221-5109 or email us.