Big II Gravity Water Filter System

Big II

(12 customer reviews)
SKU: PO1-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.


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.


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. delbrie2017 (verified owner)

    I have been using Prooneusa products for many years and we absolutely love them all. We have tried the shower head filter, all the water purification systems and find everything to be quality and more!

  2. lindy.l.l (verified owner)

    I recently bought the blue Big & personal canister one.
    I have previously bought the big stainless, the traveler, &
    Two fancier ones a few years ago. I purchased the blue for a college student,
    because the traveler was unavailable. Most of them were gifts.
    Do love your products & filters. None other as good. Hope they remain available.
    Bought the blue with stand & upgraded to two 7” filters. Runs thru at a good clip. This student is an athlete & drinks a lot of filtered water every day.
    The traveler I bought for his brother went thru four years of college with him & is now in his apt. His college friends tapped his filter for water too.
    All good.

  3. bfarish1800 (verified owner)

    Love this one for travel! I have a larger 304 stainless on the counter at home (and the pitcher) and love them, but this was a wonderful addition to our travel supplies. I used to transport many gallons of bottled water to Florida for my daughter when we went to visit family there. Couldn’t stand the taste of Florida water! Simplified travels, no toting large quantities of bottled water, no packing up my 304 stainless and hoping it didn’t get dented or otherwise ruined. ,

  4. cristafir (verified owner)

    Just started using the Big Blue 2,5 gallon system. Have used another simple bucket system for years, but got tired of not being able to find good standard replacement filters. I love the clean see through blue containers used here so I know when to add more water. I also like the fact that the filters clean out fluoride (our city is contemplating adding it to our water). I also love that ProOne has done extensive testing on what the filters actually take out. Our local water is some of the best in the nation already, BUT, it’s great peace of mind knowing that this filter system does the fine tuning. Thanks ProOne for having clear integrity. And the short video with the founder speaking of why he started the company is priceless.

  5. Nick Wohler (verified owner)

    I placed my order which I have received based on the recommendation from the “Economic Ninjas'” You Tube channel. I have not set it up for use as yes, but I plan to order another one to ship to a relative in Florida as a gift.

  6. Albert Aviles (verified owner)

    Just started using the Big II and so far all is good. The water taste great and it’s easy to use. I sleep better knowing my water has been filtered from who knows what they pit in California water supply.

  7. Kris (verified owner)

    Just began using and love the taste of the water. Have heavy metals and did not want to use a brine tank filter system as it adds chemicals to the water. Looking forward to trying the shower filter system.

  8. Samantha Blackwell (verified owner)

    I’ve been using the filters from ProOne for about 10 years. They were called ProPur when I made my first purchase. I was impressed then, and even more so now. The new big 2 system is amazing. I only use one 9 inch filter so it’s a bit more cost effective for my family. I buy replacement filters as recommended and clean my filter regularly. I’ve tested the water quality and it’s perfect! I am a total water snob now thanks to this system! 10 out of 10! Highly recommend! Get yourself a filter straw while you’re at it for good water on the go!

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