Big+ Gravity Water Filter

(32 customer reviews)


Recommended for 4+ persons

Dimensions: 9.25″ x 22.75″

304 stainless steel

Includes one ProOne® G2.0 7″ filter (upgrades available)

Includes 6″ stand

SKU: PO1-BIGPLUS Categories: ,


Your access to water is about to get upgraded. Feel good from the inside out.


Whether on the go, emergency preparedness, or for daily use, be at ease knowing you have clean drinkable water with a ProOne® Gravity water filtration system. This countertop water filter dispenser is not restricted to home use. Its dynamic and easy-to-use design makes it the most accessible and unprecedented source of clean water. It’s the perfect companion for any camping trip, gathering, or kitchen. Get to know our filter and find out how you can have quick and easy access to clean water.


Our unique countertop gravity filtration system uses ProOne G2.0 gravity filter technology to bring you clean drinking water free of harmful heavy metals including Lead, bacteria, Fluoride, VOC’s and much more. The gravity-fed water filters are easy to install and provide refreshing, quality water just about anywhere you are. There’s no electricity or plumbing required. As long as you have potable water, you have everything you need for reliable, drinkable water.


Remove contaminants with ease and feel-good knowing that our filters meet NSF/ANSI standards. All ProOne® gravity systems feature ProOne® G2.0 “all-in-one” NSF/ANSI-42 component certified filter technology – the smarter filter™. 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. Over seven million Americans get sick each year through waterborne illnesses. Don’t let bad water interrupt your life and make you unwell. Unfiltered water can leave you missing memory-making moments if you contract a waterborne disease; meanwhile, you can bring the ProOne® gravity water filter to any memory-making moment.


Consuming water should promote health rather than cause illness. Health professionals recommend that the average person drinks roughly two liters of water a day in order for proper body functioning. Drinking water is a vital activity in life. Not drinking enough water can lead to dehydration, which can leave you feeling slow or tired, or lead to more serious health conditions. Getting the proper amount of water for your body will not only increase your energy but will also help you maintain body heat, boost the immune system, protect and build muscles, think clearly, and cleanse the body of toxins. Drinking a glass of water first thing in the morning has been shown to increase people’s overall daily water intake and promote consistent hydration. Let that first, quenching sip of water in the morning come from ProOne®. With water storage of 3 gallons, you’ll be able to ensure that you are hydrated first thing and throughout the whole day.


The new ProOne® Gravity Gripper eliminates the risk of running out of water because its exclusive design makes it easy to view how much water is in the lower container simply by lifting the upper container. The Big+ Gripper style is made from 304 stainless steel for long-lasting durability, which also includes a stainless 304 spigot, a non-slip pad, and stainless steel rack. Its sleek stainless-steel design allows it to mirror its environment to perfectly adapt to its surroundings. It’s a product that you’ll want to show off to your friends but won’t show off on its own unless you call attention to it.


The development of water filtration technology dates back over 4000 years ago. Some of the earliest documentation of water filtration can be traced back to the ancient world in Greece around 2000 B.C. We’ve maximized the design and efficiency of water cleaning technology since then, and water filtration has come a long way. ProOne® wants to push it even further with a future-forward focus of providing convenient and clean water for decades to come.


Enjoy cleaner water and a cleaner earth. Utilizing natural or tap water as a main drinking water supply cuts down costs of bottled water and the negative impact that single-use plastic has on the environment. The average American uses 156 plastic bottles a year, contributing to the billions of plastic water bottles that are thrown away each year. The ProOne® Gravity water filtration system helps provide immediate access to clean drinking water while keeping the future in mind. Feel empowered with the convenience of clean water with a clean conscience about its impact.


Without the use of harsh chemicals or anything that affects the pH of water in our Gravity water filters, ProOne® provides water as pure as it is clean. Water in many traditions has been known as a sacred source since the beginning of humankind, so the fewer processes interfering with its natural state, the better.


ProOne® water filters are the background to routines and traditions. Taste the quality in a smooth sip of your coffee or in the broth of the soup recipe that’s been made every Thanksgiving for decades. It’s the main ingredient to making everything better. It’s not just a water filter— it’s a reason to enjoy the start of a day, it’s a reason to celebrate those and the things you hold dear. What routines will you develop, which traditions will you pass along? Let ProOne® be there with you while you build those lasting experiences.


We make sure that you have everything you need to get the good water and the memories flowing.


ProOne® backs the quality of this product by offering a 30-Day Risk-Free Guarantee, 5-year limited warranty (Stainless), 1-year limited warranty (ProOne® G2.0).


For best product care, clean the entire filtration system once a month and replace the filter when necessary. Please see the instruction manual for further details on product cleaning and maintenance.


Click here for lab report

Click here for instructions



Additional information

Filter Options

1 ProOne® G2.0 7" Filter Element, 2 ProOne® G2.0 7" Filter Elements, 3 ProOne® G2.0 9" Filter Elements


Polished, Brushed


3 Gallons


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


Stainless steel unit, filter(s), knob kit, spigot kit and wrench, wire stand, non-slip pad, 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.

When should I change my filters?
If you notice a difference in the taste/smell of your water and/or a slowdown in the flow rate, this may indicate your filters need to be cleaned. If after cleaning, the flow rate does not speed or you still notice the same taste/smell, it may be time for replacement.

How do I clean my filters?
Remove your filters from the upper container. Hold the filter by the blue plastic base. Place the ceramic portion under cool running water for about 2 minutes. Scrub the white ceramic material with the abrasive side of the included sponge. Rinse well. Do NOT use any soap on the filter. Do NOT allow water to enter the stem of the filter. Lay filters on the side until ready to install.

How should I store my filters?
Properly storing your filters is important when your system is not in use. If not using your system for a week or more, remove the lid, drain any water in the upper and lower containers. Remove the ProOne G2.0 water filters from your system and allow it to air dry. Wrap your filters in a terrycloth towel and store in a dry, cool place. Do NOT put the filters in a plastic bag or any enclosed container. Do NOT allow filters to freeze when wet. Do NOT place filters in the microwave oven. When you use your system again, simply reinstall the filters and discard the first supply of water from the lower container. With the ProOne G2.0 filter, it is NOT necessary to keep the filter saturated at all times.

How long can I store water in the lower container?
We recommend you cycle water from the lower container on a regular basis. Do not allow water to sit in a lower container for more than 3 days. Should you need to store water, use an appropriate water storage container.

How do I know how much water is in the lower container?
You can either lift the upper container to see the water level or use a sight glass spigot (optional) which shows the water level in the lower container. Remember to use water from the bottom container before refilling the upper container.

Why is water leaking between the upper and lower containers?
This occurs only when you have filled the upper container with more water than what can fit into the lower container.

Why is my spigot leaking?
Check the placement of the washers and nut. Try to tighten the nut.

How do I clean my stainless steel containers?
Remove the filters from the upper container. Remove the spigot. You may clean the system using mild dish soap or a 50-50% solution of white vinegar and water. Use a sponge or soft cloth. Rinse well and dry. Reinstall the filter and spigot.

Will my filter affect TDS?
Please visit for information on TDS(PPM).

Will my filter affect the pH levels?
The ProOne G2.0 filter does not affect the pH of the water.

What if I use a water softener?
We recommend you source your water before it goes through the water softener.

How often should I clean my filters and system?
It’s recommended you clean your entire system once a month.

How can I check to make sure my filters are working correctly?
Run the “Blue Food Coloring Test” to ensure your filters are working correctly. You’ll need LIQUID blue food coloring, available at most grocery stores. First, empty any water from the upper and lower containers. Place a clear container or glass under the stem of each ProOne G2.0 water filter in the lower container. Place the upper container on top of the lower container and fill the upper container with water. For the water pitcher and Scout, place (1) drop of blue food coloring and stir. For Traveler +, the Big +, and the Big II systems, place (2) drops of blue food coloring and stir. After a short period of time, check the clear containers. If the water is either clear or slightly tinted, your filter(s) are working correctly. If you see a definite blue tint, the corresponding filter(s) may need to be replaced. You may notice some blue coloring on the ProOne G2.0 filters after performing the test. This is normal and should go away after a period of time, or you may clean the filters.

What if a filter fails the blue food coloring test?
Confirm the placement of your washer is correct. Washer should be on the inside of the upper container, directly below the filter base. Ensure the wing nut is securely tightened on the filter’s threaded stem. Check to verify that the plugs are firmly installed. Plugs may need replacing over time. If none of these solutions help, please call our customer service center.

32 reviews for Big+ Gravity Water Filter

  1. mrme

    All good, works great.
    Easy to assemble. Tools are included.
    Consider using one filter at a time for $ savings, especially if you have low consumption.

  2. Andrea Meyerhofer

    We have 3 filters inside, and our water tastes so clean. Easy to assemble and we fill it daily (we drink a lot of water!) Be sure to clean the unit on the recommended schedule.

  3. Leila Hayashida

    Best filter we ever had. The water is clean and tastes just like pure water. Strong recommended!

  4. Lauren (verified owner)

    Water tastes so clean! My husband would not ditch bottled water until we bought this. Easy to assemble and use! Would highly recommend!

  5. Rebecca (verified owner)

    Incredible water filter! My entire family loves it so much. Highly recommend investing in this system. The water has a great taste. I can now tell a difference if I drink non filtered water compared to drinking from our Proone.

  6. bret (verified owner)

    Amazing Filter. Tastiest water I’ve ever had! I’m so glad I made the choice to purchase this water filter, now we always have fresh clean tasty water!

  7. Carrie Jones (verified owner)

    We love our Water filter. We have well water and it’s amazing how it filters the rust out of the water. The water tastes amazing. We just bought our second one for our other house and can’t wait to get to using it. I plan on getting a shower head next.

  8. dionnerea (verified owner)

    I LOVE my ProOne!!! The water is just terrific! I really like the fact that I only need to buy one filter that includes fluoride. I also recently found out that ProOne filters out Roundup too. Yay!!!!

  9. Jan Cline (verified owner)

    This is a well made product. Best water I ever had !

  10. John Smith (verified owner)

    Easy to setup, clean and refill. Water tastes great.

  11. Patrick

    BEST WATER EVER. Have had a ProPur for years. Love it. There’s 2 of us and we only drink water, so refill every day. Plus we bought a clear blue 2.5 gallon container that goes in fridge. So you can fill that up and make more filtered water in the ProOne and always have plenty of great tasting water to drink and cook with.

    Love the shower heads also.

  12. Shashidran Rajagobal (verified owner)

    Great water taste, excellent water filter. All in 1 filters – no extras needed.
    Very good build quality, excellent product.
    Very fast world wide delivery.
    Highly recommend the ProOne and this company.

  13. Veronika Gusty (verified owner)

    We’ve been using this for about a month and couldn’t be happier! Water tastes amazing!!! So happy my kids don’t have to drink chemical polluted water anymore. It was definitely a good investment

  14. Jacob G (verified owner)

    Great filter! Water taste great and filters quickly with the 3 filter option. I had a pin hole on my top container and ProOne customer service was fast to get me a new hassle free.

  15. Nathaniel Palmer (verified owner)

    Great water filter, works fantastic! Currently using only one water filter, but I love the option to have three at a time when having people over!

  16. mhmaxwell (verified owner)

    ..I’ve been using Propur Filtration Systems since 2014 and just received my new Big+ System. I’m using 2-9” filters and It works great! I can highly recommend this gravity filtration system.

  17. annwithaplan (verified owner)

    I have confidence in the ProOne systems. I had gotten a small system for myself some years back and loved it. I’m on clean well water, so I sent it to my mother and she loved (still loves) it, too. She could really taste a difference between the clean water and city water. Then I got the same system for my oldest daughter a few years ago, but they were filling it 2-3 times per day. For a family of 6 they really needed something bigger. So I recently got her the largest system and boy was she happy. She then gave her smaller one to my other daughter.

  18. Jessica (verified owner)

    So far we have been very pleased with this water filter! Big enough for our family of 4. Easy to fill & maintain and the price is just right too!

  19. Ashley Knight (verified owner)

    We bought this a month or so ago and absolutely love it.
    The brushed silver is easy to clean.
    The water tastes so fresh. We bought two filters and plan to buy another.
    We just fill it at night and have plenty of water all day for our family of 5!
    Very happy we made this purchase instead of the competitor system.

  20. Ralene Anderson (verified owner)

    I recently purchased the Big + and I am very happy with it. Not only is the water great tasting, but it is piece of mind knowing that the water is safe to drink for the whole family.

  21. Cameron (verified owner)

    I’ve had the ProOne Big + gravity system filter for a couple of months now and I am incredibly happy with the product. Good, clean water is extremely important to me and I’ve got to say, this thing works. Besides the fact that public water contains all kinds of substances we don’t think about, growing up on a well it’s always tasted like drinking a swimming pool to me. The off-the-shelf filters do NOT work. The ProOne is the only filter system I’ve ever used or tasted water out of that works as advertised. I feel great knowing that safe, clean water is at my fingertips. My water consumption has doubled since owning the product. Thanks ProOne!

  22. Katherine

    Easy set up. Low maintenance. The spigot sometimes gets loose and I wake up to a puddle of water underneath. Just have to retighten often. Great company!

  23. Emily Lauer

    Love these filters and love that the water is actually purified and safe to drink. I started with a pitcher, but it was a bit small and a bit slow to filter, so great for 1 person for drinking water only. I switched to the larger gravity system to have more gallons per day.

  24. Susan

    BEST ever!…Great product; GREAT customer service; GREAT, GREAT water! Everything
    We tried a Competitor System prior to getting our ProOne; I was less than impressed….irate would be the more accurate word…..sent the whole kit-and-caboodle back. Did more research, got it down to two….decided on the ProOne and BOY am I glad I did. Nothing but happiness…if I could give it 10 waterdrops I would.

  25. tgmilr (verified owner)

    I’ve had the ProOne Big + gravity system filter for a month now and I am happy with the product. Well built, easy to use. Best filtration on the market Thanks, ProOne!

  26. Dain Oyler

    I live in Southfield, MI and the water is TERRIBLE! In the past I’ve used two Competitor Water Filters, sometimes at the time same time lol (twice filtered). It was always a hassle, and I found that the water would smell if it sat overnight in the espresso machine and the filters would go bad in 1-2 months and that’s what was happening here prior to purchasing the Proone. I’ve heard of a different major competitor filters but in my research discovered that they do not filter out fluoride conveniently, These filters do, and the water tastes great! It can sit around for days and still, taste great. These do a great job at filtering. I’m running 2 7″ plenty for 2 people, I fill it with 3 pitchers every day. I’ve been taking water to work to cut back on plastic bottles. Buy one for everybody in your family!

  27. Stephen P. (verified owner)

    A solid unit that filters the harsh North Texas water extremely well. It’s built like a tank, it was easy to assemble, and it works as advertised.

  28. aliciariddick (verified owner)

    The water tastes great and after listening to a podcast on the dangers of PFOA’s I am so relieved to have safe water!
    Easy assembly and Maintenance. Worth every dime.

  29. Corrie Miller (verified owner)

    I had done a lot of research on water filters. I finally committed to this one and can say I have loved it. The quality of our water tastes great. We bought three filters and it filters our water in about an hour but we are continuously filtering water as that is what my family primarily drinks. We have all been so satisfied and thankful we committed to this filter, it doesn’t disappoint.

  30. Neal (verified owner)

    My family of 5 loves this gravity fed filter system. I usually drink at least a gallon per day sometimes more just by myself. I just replace what I drink with tap water and the rest of the family has enough water to last all day. We use it all day long every single day. It is very satisfying knowing my kids are drinking safe, clean water.

  31. Tim Cox (verified owner)

    Glad I found ProOne. This unit is easy to assemble. The water tastes great. Best filter I have ever used. Customer for life.

  32. Brian Wiseman (verified owner)

    Great filter, I got the 9″ filters as well
    Very well built and is just as good or better than a Berkey.

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