AquaTru Countertop Reverse Osmosis Purifier vs ProOne Big+ Gravity Water Filter
AquaTru Countertop Reverse Osmosis Purifier vs ProOne Big+ Gravity Water Filter compared spec-by-spec. Filtration performance, flow rate, pricing, pros, cons, and our verdict on which water filter to buy.
| Specification | A — aquatru AquaTru Countertop Reverse Osmosis Purifier 8.4/10 $450 Check Price on Amazon $499
Save $49 | |
|---|---|---|
| Filter Type | 4-stage reverse osmosis | gravity |
| Weight | 16.3 lbs | 10 lbs ✓ Winner |
| Capacity Gallons | 0.75 | 3 |
| Flow Rate | 10-15 min per batch | — |
| Filter Life Gallons | 1,200 | 1,000 |
| Pore Size | 0.0001 micron (RO membrane) | — |
| Contaminants Removed | bacteria, protozoa, viruses, PFAS/PFOA, lead, fluoride, arsenic, chlorine, nitrates, heavy metals, pharmaceuticals, microplastics, VOCs | bacteria, protozoa, chlorine, lead, PFAS, microplastics, pesticides, pharmaceuticals, heavy metals, VOCs |
| Requires Power | Yes | No |
| Virus Removal | Yes | No |
| Nsf Certified | Yes | — |
| Contaminants Certified Removed | 84 | — |
| No Plumbing Required | Yes | — |
| Filter Stages | 4 | — |
| Dimensions | 14 x 14.5 x 12 in | — |
| Bpa Free | Yes | — |
| Operating Temp | indoor use | — |
| Flow Rate Gph | — | 2.75 |
| Filter Elements Included | — | 2 |
| Max Filter Elements | — | 3 |
| Filter Element | — | ProOne G3.0 7-inch |
| Material | — | 304 stainless steel |
| Height Inches | — | 22.75 |
| Diameter Inches | — | 9 |
| Serves People | — | 4+ |
| Iapmo Certified | — | Yes |
Buy the AquaTru Countertop Reverse Osmosis Purifier
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Buy the ProOne Big+ Gravity Water Filter
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Who Should Buy the AquaTru Countertop Reverse Osmosis Purifier?
The AquaTru Countertop Reverse Osmosis Purifier is designed for gravity fed cabin, emergency preparedness. As a 4-stage reverse osmosis, it removes viruses, bacteria, and protozoa for true purification-level protection.
Key advantages include: removes 84 nsf-certified contaminants including pfas, lead, and fluoride; true 4-stage reverse osmosis — the most thorough filtration available; no plumbing or installation required — plug in and pour. At 16.3 lbs, it's better suited for basecamp or vehicle-based use.
Priced at $450, the AquaTru Countertop Reverse Osmosis Purifier scores 8.4/10 in our testing — an excellent performer across our key metrics.
Who Should Buy the ProOne Big+ Gravity Water Filter?
The ProOne Big+ Gravity Water Filter is designed for gravity fed cabin, emergency preparedness. As a gravity, it handles bacteria and protozoa — appropriate for most backcountry and domestic use cases.
Key advantages include: iapmo certified to reduce lead, total pfas, microplastics, and chlorine; 3-gallon capacity serves households of 4+ people easily; 304 stainless steel construction is durable and easy to clean. At 10 lbs, it's better suited for basecamp or vehicle-based use.
Priced at $280, the ProOne Big+ Gravity Water Filter scores 8.5/10 in our testing — an excellent performer across our key metrics.
How Do the Specs Compare?
Filter type: The AquaTru Countertop Reverse Osmosis Purifier is a 4-stage reverse osmosis while the ProOne Big+ Gravity Water Filter is a gravity. Different filter types suit different scenarios — consider your primary use case when choosing between them.
Filtration performance: The AquaTru Countertop Reverse Osmosis Purifier scores higher on filtration at 9.8/10 versus 9/10 for the ProOne Big+ Gravity Water Filter. The AquaTru Countertop Reverse Osmosis Purifier's virus removal capability is the key differentiator — essential for international travel or emergency scenarios where source water quality is unknown.
Filter life: The AquaTru Countertop Reverse Osmosis Purifier lasts longer at 1,200 gallons versus 1,000 gallons. Factor in replacement cartridge costs when comparing long-term value.
Portability: The ProOne Big+ Gravity Water Filter is lighter at 10 lbs versus 16.3 lbs for the AquaTru Countertop Reverse Osmosis Purifier. For backpacking and wilderness travel, every ounce counts — but for car camping or emergency preparedness, weight is less critical than capacity and ease of use.
Price: The ProOne Big+ Gravity Water Filter costs $280 versus $450 for the AquaTru Countertop Reverse Osmosis Purifier — a $170 difference. If the pricier unit offers significantly better filtration performance or longer filter life, the upfront cost difference often pays for itself over time.
🏆 Our Verdict
Choose the AquaTru Countertop Reverse Osmosis Purifier if you need a reliable and proven filtration solution and premium build quality and features.
Choose the ProOne Big+ Gravity Water Filter if you prioritize value (typically $170 less) , portability (10 lbs vs 16.3 lbs).
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