Big II Gravity Water Filter System

Big II

(12 customer reviews)

ProOne G2.0

We are in the process of transitioning to an improved gravity filter. You may receive our ProOne G3.0 which has the same proven technology in the first 2 stages as the ProOne G2.0 filter. The G3.0 has an additional third-stage carbon block inner core to help enhance performance. The G3.0 has the same NSF-42 component safety certification and includes the recent NSF-372 lead-free certification. Complete contaminant removal testing is underway and will be added to the website soon.

SKU: PO3-BIGII Categories: ,

Whether on the go, emergency preparedness or for daily use, be at ease knowing you have clean drinkable water with the new ProOne® BIG II Gravity water filtration system.


Easy to set up. No electricity or plumbing required. Use with just about any potable water source whether at home, office, school, camping or traveling.

All ProOne® gravity systems feature ProOne® G2.0 “all-in-one” NSF/ANSI-42 component certified filter technology – the smarter filterTM. Infused bacteriostatic outer ceramic shell and proprietary carbon-based granular media inside the core of the filter. Independent lab tested to NSF standards 42, 53, P231, microplastics,1,4 Dioxane, Microcystin, emerging contaminants, PFOAS (GenX), TTHM’s, Fluoride, Lead, Parasites and more. Visit our lab reports for full details on the 200+ tested contaminants. May contain coconut.


The new ProOne® BIG II Gravity system features exclusive design for viewing how much water is in the lower container by just looking at it. The BIG II is made from heavy duty BPA, BPS & BPF Free plastic for long lasting durability and includes a BPA free plastic spigot. Includes carrying bag.



  • 9.25″ diameter
  • 11″ nested height, 21″ assembled height without stand


ProOne G2.0 Ceramic Gravity Countertop Water Filters are NSF/ANSI-42 Component Certified!

ProOne® Water Filters offers affordable water filtration systems to help improve the quality of your water. Dedication to innovation, extensive testing, and exceptional customer service is our commitment to you! Get the only NSF certified gravity countertop water filter on the market today!



Click here for lab report

Click here for instructions

Weight N/A
Filter Options

1 ProOne® G2.0 5" Filter Element, 2 ProOne® G2.0 7" Filter Elements


2.5 Gallons


30-Day Risk-Free Guarantee, 1-year limited warranty


Plastic unit, filter(s), knob kit, spigot kit, plug(s), sponge, instruction booklet


ProOne® G2.0 Series water filter cartridge is Tested and Certified by NSF International against NSF/ANSI Standard 42 for material requirements only.


12 reviews for Big II Gravity Water Filter System

  1. James Wetherington (verified owner)

    I bought a Berkey because my daughter has one from about 7 years ago… what a disapointment, they have gone downhill.. Everything smelled of rubber, an something is wrong with the brand new filters…

    But then I was suggested to check out ProOne. I got the Blue One so I could see thru it and what a pleasure.
    Followed the directions and works great, at a better price.

    Everything I’ve said about the Berkey is true, I’m thinking about buying some ProOne ceramic filters for it, and then give it to a family member but I’m never buying from Berkey again.

  2. Jeff (verified owner)

    Light weight and you can easily see the water level at a glance. I did however have problems tightening the filters down. The nut would snap and then loosen. I did return this and ordered something else. The very best customer service. Thank you ProOne.

  3. Susan Breylinger (verified owner)

    I love my Big ll. I upgraded to 2- 7″filters and it filters plenty of water for 2 of us. Exactly 1 week from the day I set it up, I noticed the filters were barely dripping. I removed them to see what was going on and saw they were discolored and almost completely clogged. After giving them a scrub, they were good as new. That is some nasty tap water, no wonder I couldn’t bring myself to drink it. I like that I can easily, see the water level, drip speed and that it’s really easy to refill. Best of all, the water tastes awesome! I recommend Pro One 100%

  4. Thomas Small (verified owner)

    Big II system worked as advertised, plus no aftertaste and filled tank within an hour.. Ordering another one for relatives.

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