BIG II Gravity Filter - 2.5 Gal for 2-4 People - by ProOne
BIG II Gravity Filter - 2.5 Gal for 2-4 People - by ProOne

BIG II Gravity Filter - 2.5 Gal for 2-4 People - by ProOne

Regular price $170.00 Sale price$139.95 Save $30.05
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  • 3rd Party Lab Proven Performance
  • Researched by loved ones, to protect loved ones


Use a filter or else your body IS the filter! 

Filters work best when they are replaced regularly. 


Big II Gravity is Durable

  • 2.5 Gallon Filtered Water Storage
  • Water level viewing window
  • Unit has 2 holes to accommodate 1 or 2 filters.
  • Plugs are provided for un-used holes
  • Choose to use more filters for increase flow rate and less frequent replacements
  • "All in One" Filter Technology
  • Made from a heavy duty food grade plastic
  • BPA Free, BPS Free, BPF Free, Lead Free
  • Easy to Set Up Instructions Click here see Page 1
  • Easy to Clean Instructions Click here see Page 2
  • No electricity needed
  • No plumbing needed
  • For use with potable water
  • The first cycle of water generally takes longer but the flow rate will increase with use
  • Published Independent Third Party Lab Reports Click here see Report
  • FAQ Click here see Page 4
  • Made from domestic & imported components.  Factory located in Michigan USA.  Ceramic filters made in UK.

Perfect for:

  • Office
  • Kitchen
  • Rentals
  • Camping
  • Traveling
  • Bug-Out-Bag

Why is this better than Berkey?

  • Filters are SILVER infused ceramic to help prevent the growth of bacteria
  • No add-on filter required for fluoride reduction
  • No priming required
  • No need to keep the filters saturated when not in use
  • Better value, less cost for replacement filters per gallon

The ProOne BIG Stainless Steel Gravity Filter System helps reduce and remove more than 200 contaminants including VOC™s, leadfluoride, heavy metals, pesticides, SVC™s, disinfectants, glyphosate, inorganic non-metallics, herbicides, pharmaceuticals, PFOA, PFOS and micro-organisms while leaving good essential minerals like calcium and magnesium.   Feel healthier!  Great for humans, animals and plants! 

ProOne® Big II system features: 

All ProOne® gravity systems feature ProOne® G2.0 all-in-one NSF/ANSI-42 component certified filter technology “ the smarter filterTM. Independent lab tested to NSF standards 42, 53, P231, microplastics,1,4 Dioxane, Microcystin, emerging contaminants, PFOAS (GenX), TTHM™s, bacteria, Fluoride, Lead, Parasites and more. Visit our lab reports for full details on the 200+ tested contaminants.  View published third party lab results here.

What is Included:

  • Food Grade Durable Plastic Unit Free of BPA, BPS, BPF and Lead
  • Filter(s) (see options above)
  • Plastic Spigot Kit
  • Wrench for easy assembly
  • Hole plug in case user chooses to use only 1 filter instead of 2
  • Travel Bag
  • Cleaning Sponge
  • Printed Set Up Instructions Click here see Instructions


    Please be certain to check this item will fit where you plan to use it. 

      • 9.25" Diameter
      • 11" Height when nested
      • 21" Height when assembled
      • 2.5 Gal Capacity 


      30-Day Risk-Free Guarantee, 5-year limited warranty (Stainless), 1-year limited warranty (ProOne® G2.0)

      Replacement Filters:

      ALL ProOne Filter replacement filters also fit ALL Berkey Systems!

       Propur ProOne 5" Filter for Traveler     5"Replacement Filter (filters 900 gallons, 0.18 gllons/hour flowrate) works with ProOne Traveler+ and all Berkey Systems

      ProOne formerly ProPur gravity filter 7 inch replacement filter7" Replacement Filter (filters 1000 gallons, 0.26 gllons/hour flowrate) works with ProOne Traveler+,  ProOne Big+ and all Bertkey Systems


      • Shipping Cost is FREE* for this item
      • Orders placed after 4pm EST will be processed on the next business day
      • Once an order is place, it may take 48 hours to receive an email with a tracking number or an email with an order update.
      • Once a tracking number has been issued, the package typically takes 5-7 business days to be delivered from Michigan.  This may take longer during holidays.
      • Please monitor tracking of your order.
      • Highbrow Water Filters is NOT responsible for stolen packages if the tracking number shows the items has been delivered.

      The Propur brand has changed their name to ProOne - Same owner and same amazing products!


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        That's what we did, and compiled these highly effective brands backed by sound science.

        Our company was founded by a husband and wife team of engineers who were looking for safer water for their newborn.

        We know that nothing beats 3rd PARTY LAB RESULTS with PROVEN PERFORMANCE for water filters, water structuring devices and EMF harmonization devices.



        "this is the first and best purchase I've made for it! The water tastes incredible and I know that it's nourishing the cells on our body with every sip! After the first week of drinking our newly filtered and structured water, I felt my energy levels really spring back to life. I had been feeling pretty worn out and I feel really great now. Clean. Healthy water has been the biggest change I've made that has affected that."

        Delphina P.
        Director, Prevention Research Center, Mother of Two

        "This filter system is the best! I searched tirelessly & finally found a full house system that removes fluoride, in addition to all of the other garbage. The amazing bonus I never expected is the customer service & education that Highbrow provides. I rarely see 100% ethical, helpful & knowledgeable people passionate about their work"

        England D.
        Founder of England's Primal Health, Mother of Three

        "I am so thankful to have found this company. Their customer service is world class as they took time to help me find the perfect solution to my needs. They are true experts in the field who are not looking to just make a sale but to match you up with the right product and they really have taken the time to research the plethora of filtration options out there and focus on those which are tested, certified, proven to deliver great value. You will get the best pricing as well."

        Robert J.
        Founder: Growth Health Wealth: Fitness Expert, Dog Dad

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