Table of Contents
🧾 Overview
The ProOne Big+ is a standing countertop water filter that uses gravity filtration to reduce or remove more than 200 contaminants from water.
With a 3-gallon capacity, this stainless steel filter is suitable for families of 4+ people, and is has been tested to NSF standards to remove chlorine, lead, and more.
đź“‹ System Specifications
- Weight: 10 lbs
- Capacity: 3 gallons
- Dimensions: 9.25″ x 22.75″
- Stand: 6”
- Filter: ProOne® G2.0 7″ filter (upgrade for 3 ProOne® G2.0 9″ Filter Elements)
- Finish: Stainless steel, polished, brushed
- Warranty & guarantees: 30-Day Risk-Free Guarantee, 5-year warranty on tank, 1-year limited warranty on filter
đź’ˇ Features
Upper & lower chamber
The ProOne Big+ is split into an upper and lower chamber. The design of the filter unit makes it easy to lift the upper chamber and check the lower chamber to see how much water is left over.
Ceramic GAC filter
Included with the ProOne Big+ is a 7” ceramic GAC filter. You can upgrade to 3 7” filters or two 9” filters to reduce the frequency of maintenance needed.
6” stand
The ProOne Big+ comes with a stand that elevates the filter, making it possible to place a large, tall jug underneath the spigot to fill with water.
Installation accessories
As well as the filter and stainless steel chambers, the ProOne Big+ comes with all the installation necessities, including a spigot and knob kit, sponge, plug, and wrench. Also included is an instructions booklet to assist with DIY setup.
🚦 Performance
The ProOne Big+ is a standalone gravity filtration unit that can be used in any location (providing you have a nearby water source available).
When you add water to the top chamber, it moves through a filter that separates the top chamber from the bottom one. The contaminants are trapped in the filter, leaving clean, pure water in the bottom chamber.
Gravity filters have a reputation for slow filtration, but the majority of ProOne Big+ customers were happy with the system’s flow rate. There is an option to speed up filtration, however – there’s room to add another 1 or 2 filters to the top chamber.
The ProOne Big+ should offer a good-quality, steady performance for at least 12 months before the filters require changing.
🧽 Cleaning & Maintenance
The ProOne Big+ doesn’t require a professional installation.
Simply set it up on a flat surface and slot the components into place. The user manual provides instructions on how to do this.
The biggest maintenance task for the ProOne is replacing the filters. With daily use, the G2.0 7″ filter will last for up to 12 months or 1,000 gallons, while the ProOne® G2.0 9″ has a slightly longer lifespan of 1,200 gallons.
You will know when the filters need changing, as your water flow will slow significantly. Again, you won’t require a plumber to replace the filters; you simply pop the old cartridge out of the housing and exchange it for a new one.
You will need to clean the inside of the tank at least once a week, preferably after every use, to prevent a buildup of contaminants. You can use white vinegar to remove tougher stains and scale or hot, soapy water for general washing.
đź“ť Filter Info
As a gravity water filter, the ProOne Big+ doesn’t require electricity or water pressure to operate, making it an ideal travel filter or emergency preparedness accessory.
The ProOne filter is made from granular activated carbon (GAC) and is tested to NSF Standard 42, for the removal of chlorine, tastes and odors, as well as Standard 53, for the removal of lead and heavy metals. The filter has also been tested for the removal of microplastics, emerging contaminants, and more.
See the performance metrics of the ProOne filter from our third-party laboratory analysis in the table below.
| Contaminant | Priming Water | Test 1 Pre-Filtration | Test 1 Post-Filtration | % Reduction | Test 2 Pre-Filtration | Test 2 Post-Filtration | % Reduction |
|---|---|---|---|---|---|---|---|
| Aluminum | ND | 0.052 PPM | 0 PPM | 100% | 0.03 PPM | 0 PPM | 100% |
| Barium | 0.0265 PPM | 0.0127 PPM | 0.0275 PPM | +116.54% | ND | ND | ND |
| Bromodichloromethane | 0.00289 PPM | 0 PPM | 0.00319 PPM | n/a | ND | ND | ND |
| Calcium | 35.1 PPM | 8.8 PPM | 19.3 PPM | +119.32% | ND | ND | ND |
| Chloride | 14.4 PPM | 6.9 PPM | 8.3 PPM | +20.29% | ND | ND | ND |
| Chloroform | 0.0141 PPM | 0.0352 PPM | 0.0155 PPM | 55.97% | ND | ND | ND |
| Cobalt | 0.0013 PPM | ND | ND | ND | ND | ND | ND |
| Copper | 0.0424 PPM | 0.0434 PPM | 0 PPM | 100% | ND | ND | ND |
| E. coli | ND | ND | ND | ND | 15 CFU/100ml | 0 CFU/100ml | 100% |
| Enterococcus | ND | ND | ND | ND | 4 CFU/100ml | 0 CFU/100ml | 100% |
| Fluoride | 0.1 PPM | 0.1 PPM | 0 PPM | 100% | ND | ND | ND |
| Iron | ND | ND | ND | ND | 0.1 PPM | 0.02 PPM | 80% |
| Lead | 0.0009 PPM | 0.0006 PPM | 0 PPM | 100% | ND | ND | ND |
| Magnesium | 10.6 PPM | 2.19 PPM | 7.91 PPM | +261.19% | ND | ND | ND |
| Manganese | ND | 0.001 PPM | 0 PPM | 100% | 0.02 PPM | 0 PPM | 100% |
| Phosphorus | ND | ND | ND | ND | 0.01 PPM | 0.21 PPM | +2000% |
| Potassium | 1.91 PPM | 0 PPM | 1.27 PPM | n/a | ND | ND | ND |
| Sodium | 12.5 PPM | 10.4 PPM | 14.2 PPM | +36.54% | ND | ND | ND |
| Strontium | 0.193 PPM | 0.062 PPM | 0.098 PPM | +58.06% | ND | ND | ND |
| Sulfate | 24.1 PPM | 10 PPM | 16.9 PPM | +69.% | 42.29 PPM | 27.4 PPM | 35.21% |
| Total Coliform | ND | ND | ND | ND | 75 CFU/100ml | 0 CFU/100ml | 100% |
| Total THMs | 0.01699 PPM | 0.0352 PPM | 0.01869 PPM | 46.90% | ND | ND | ND |
Made entirely from stainless steel (including a stainless steel spigot), the ProOne Big+ won’t add anything harmful into your water during the filtration process. The base of the filter is made from BPA-free plastic.
As ceramic filters, the ProOne cartridges don’t require priming. You can simply attach them to the lower chamber and filter your water straight away.
When it comes to contaminant removal, the ProOne Big+ rivals even the strongest contenders, including Berkey’s Big Berkey. The system can reduce or remove more than 220 impurities, including pesticides, herbicides, chlorine and chloramines, heavy metals, and pharmaceuticals.
đź”” Pros & Cons
đź‘Ť What I Like
- Fast filtration – For a gravity filter, the ProOne Big+ works quickly to filter water for families of 4 people or more.
- Two filter size options – To minimize the need for maintenance, you can choose to buy the ProOne Big+ with the larger 9” filter.
- Can be used anywhere – You don’t need to connect the ProOne Big+ up to a power source or a water line for it to operate. It’ll work on its own, making it ideal for travel or emergency preparedness.
đź‘Ž What I Don’t Like
- Rust issues – Despite the ProOne Big+ being made from stainless steel, some customers noticed rust issues. This should be avoided with regular cleaning.
- Expensive gravity filter – The ProOne Big+ is more expensive than the average gravity filter, costing more than $350.
âť” Frequently Asked Questions
What is the difference between the ProOne® G2.0 7″ and the ProOne® G2.0 9″? Should I get the more expensive filter?
The only difference between the ProOne® G2.0 7″ and the ProOne® G2.0 9″ is filter size. Being slightly bigger than the standard 7” filter, the ProOne® G2.0 9″ lasts another 200 gallons. It doesn’t remove any additional contaminants, but you may prefer to buy this filter if you want to limit the frequency of maintenance.
Is the ProOne a new filter?
The ProOne Big+ has been available for a number of years under a different name (Propur), but the manufacturer has now rebranded and the ProOne Big+ has had a facelift in the process. It still offers the same benefits of the original Propur Big, but has additional features that the original model didn’t have, such as a 6” stand.
Found this review helpful?
Comment below or share this article!
BACTERIA REMOVAL– This is most important to me. Does this unit remove bacteria?
Thank you.
Yes it does! We lab tested one with untreated river water that had enterococcus, e.coli and coliform bacteria, and it removed 100% of all bacteria (we are working on an update to the article)