Purewell U01 Electric-Free Tankless Reverse Review: Specs, Pros and Cons
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
This purewell u01 electric free tankless reverse review examines a compact under-sink filtration unit designed for modern kitchens. It delivers 800 gallons per day of purified water without requiring electricity. The system relies entirely on incoming water pressure to operate. It features a 7-stage filtration process with a 0.0001 micron reverse osmosis membrane. The tankless design measures 5.7 by 5.7 by 16 inches. This small footprint saves significant cabinet space compared to traditional systems with storage tanks. You get fresh water on demand without secondary contamination risks.
What stands out
- Zero electricity requirement for operation and noise reduction
- 800 GPD capacity with a 3:1 pure-to-drain ratio
- NSF/ANSI 58 and 372 certified filtration stages
- Compact tankless design fitting 5.7 x 5.7 x 16 inch spaces
- Built-in TDS display and pressure gauge for monitoring
Who it fits
Good fit for
This system suits households with limited under-sink storage who need high flow rates. You will appreciate the tankless design if you want to avoid stale water from storage tanks. It is ideal for users who want to eliminate electrical cords under the sink. The 3:1 drain ratio appeals to those concerned about water waste. Families who need quick access to large volumes of purified water will benefit from the 800 GPD output.
Who should skip it
You should look elsewhere if you require a system with a built-in storage tank for backup during low pressure. This unit lacks a smart app connection or remote monitoring capabilities. If you need a system that operates independently of municipal water pressure, this electric-free model may not suffice. Users seeking a more complex multi-stage setup beyond seven stages might find this too simple. The lack of a power outlet requirement also means no electronic alerts for filter changes beyond the manual indicator.
Verdict: The Purewell U01 offers high-volume, tankless filtration without electrical needs. It is a practical choice for space-constrained kitchens seeking efficient water purification.
Purewell U01 Key Specifications Explained
Capacity (GPD): 800
This rating indicates the system can produce up to 800 gallons of purified water daily under optimal pressure and temperature. In practice, this supports high-volume usage, allowing you to fill a standard glass in roughly five seconds. It is suitable for households that need a steady stream of filtered water for cooking and drinking without long waits.
Design: Tankless
The unit operates without a bulky storage tank, measuring 5.7 by 5.7 by 16 inches. This compact footprint frees up significant under-sink space for other items. It also prevents secondary contamination or stale water often found in traditional tanked systems, ensuring every drop is freshly filtered directly from the membrane when you turn on the tap.
Pure to Drain Ratio: 3:1
For every one cup of wastewater produced, this system generates three cups of purified drinking water. This efficient ratio reduces water waste compared to older RO models that may produce more brine. It helps lower your household water consumption while maintaining high purification standards, making it a more sustainable choice for daily use.
Micron Rating: 0.0001
The reverse osmosis membrane has a pore size of 0.0001 microns, which is small enough to block microscopic contaminants. This precision allows the system to remove up to 90% of total dissolved solids and over 1,000 impurities, including PFAS, fluoride, and arsenic. You receive water with a clean, crisp taste similar to bottled quality.
Design And Build Quality
According to the listing, the Purewell U01 features a tankless design with a white finish. The unit measures 5.7 inches in length and width, with a height of 16 inches. It weighs 8.4 pounds. This compact footprint allows it to fit easily into most under-sink cabinets. By removing the bulky traditional storage tank, the system frees up significant space. You can store cleaning supplies or other kitchen items in the area previously occupied by a large reservoir. This layout also prevents secondary pollution and stale water issues common in tanked systems.
The system includes a built-in real-time TDS display screen on the top cover. This screen monitors water quality at a glance. A manual filter installation month indicator helps you track maintenance schedules. The listing notes color-coded quick-connect tubings for installation. These components suggest a user-friendly setup process that does not require professional plumbing skills. The white exterior provides a clean, modern look that blends with standard kitchen fixtures. The compact dimensions ensure it does not dominate your under-sink space. This design prioritizes efficiency and ease of use for daily household needs.
Setup And Daily Operation
The Purewell U01 relies on incoming water pressure rather than electricity to function. This means you do not need a nearby power outlet under your sink. The system operates silently, with no mechanical vibration or electrical noise. You can install it yourself in under thirty minutes using the color-coded quick-connect tubings. The listing states that no professional plumber is required for this process. The unit includes a manual filter installation month indicator to help you track maintenance schedules. Daily use is straightforward. You turn on the dedicated faucet to access filtered water. The system features a built-in real-time TDS display screen on the top cover. This allows you to monitor water quality at a glance. A top-cover water pressure gauge is also included to show system status. The tankless design ensures water is filtered fresh each time you turn on the tap. This prevents the stale water issues common in systems with storage tanks. The unit measures 5.7 inches by 5.7 inches by 16 inches. Its compact size frees up significant under-sink storage space. You can store cleaning supplies or kitchen items where the bulky tank would have been. The 3:1 pure-to-drain ratio means the system produces three cups of purified water for every one cup of wastewater. This efficiency reduces water waste compared to traditional models. The 0.0001 micron RO membrane intercepts microscopic impurities. You receive crisp, bottled-quality taste without waiting for a tank to refill. The system continues to work during power outages since it needs no electricity.
Before You Buy The Purewell U01
You need to verify your under-sink space before purchasing. The unit measures 5.7 by 5.7 by 16 inches. Ensure your cabinet has enough depth and height for this tankless design. You must also check your incoming water pressure. This system relies entirely on water pressure to operate. Low pressure can reduce the 800 GPD output significantly. You should confirm that your faucet matches the quick-connect fittings. The listing mentions color-coded tubings for easy setup, but compatibility varies. Upkeep involves monitoring the TDS display and the manual filter indicator. You will need to replace filters according to the schedule shown. This model fits well if you prioritize space savings and high flow. It differs from tanked systems by preventing stale water. It also differs from electric models by requiring no outlet. Check your drain line capacity for the 3:1 waste ratio. This ratio produces more wastewater than traditional units. Verify your local plumbing codes allow this installation method. The system is NSF/ANSI 58 and 372 certified. This ensures safe materials and filtration performance. You should keep spare pre-filters on hand. The 7-stage process requires regular maintenance to maintain purity.
Check before you buy
- Measure under-sink height, width, and depth for the 16-inch unit.
- Check incoming water pressure to ensure optimal 800 GPD flow.
- Confirm faucet compatibility with the included quick-connect fittings.
- Verify drain line can handle the 3:1 wastewater ratio.
The product at a glance
Purewell U01 800 GPD Tankless RO
Best for: under-sink setups without nearby electrical outlets
- Filtration Stages
- 7
- Capacity (GPD)
- 800 GPD
- Design
- Tankless
- Pure to Drain Ratio
- 3:1
- Certification
- NSF/ANSI 58, NSF/ANSI 372
- Filtration Type
- Reverse osmosis
View on Amazon: Purewell U01 800 GPD Tankless RO Affiliate link
This under-sink reverse osmosis system filters tap water without an electrical outlet, relying entirely on incoming water line pressure. It delivers up to 800 gallons per day with a 3:1 pure-to-drain ratio and 7-stage filtration down to 0.0001 microns. It suits you if you want a compact footprint and reliable drinking water during household power outages.
Pros
- Operates without electricity using water line pressure
- High 3:1 pure-to-drain efficiency ratio
- 800 GPD flow rate dispenses 6 ounces in 5 seconds
- 7-stage filtration rated down to 0.0001 microns
- Compact tankless footprint measuring 5.7 by 5.7 inches
Cons
- TDS reduction is rated up to 90 percent
- Requires sufficient incoming water line pressure because it lacks an electric booster pump
- Filter life tracking relies on a manual month dial rather than an electronic life sensor
Good fit if
- You do not have a dedicated power outlet beneath your kitchen sink.
- You want to minimize wastewater with a 3:1 pure-to-drain ratio.
- You need a compact tankless system that takes up less than 6 inches of cabinet width.
Skip if
- You require a TDS reduction rate higher than 90 percent.
- You have low household water pressure and need a motorized booster pump.
Verdict: Purewell Electric-Free Tankless RO System provides high-speed 800 GPD filtration for households that need reliable water purification under sinks without electrical outlets. It delivers an efficient 3:1 wastewater ratio while running quietly on line pressure alone.
Specifications side by side
| Spec | Purewell U01 800 GPD Tankless RO |
|---|---|
| Filtration Stages | 7 |
| Capacity (GPD) | 800 GPD |
| Design | Tankless |
| Pure to Drain Ratio | 3:1 |
| Certification | NSF/ANSI 58, NSF/ANSI 372 |
| Filtration Type | Reverse osmosis |
| Contaminants Removed | TDS, PFAS, microplastics, fluoride |
| Installation Type | Under sink |
| Micron Rating | 0.0001 μm |
| Capacity | 800 GPD |
| Color | White |
| Dimensions | 5.7 × 5.7 × 16 inches |
| Weight | 8.4 pounds |
| Model | U01 |
Frequently asked questions
Does the Purewell U01 need electricity to work?
No, the Purewell U01 operates without electricity. It relies entirely on incoming water pressure to drive the filtration process. This electric-free design means you do not need a power outlet under your sink for installation. It functions silently, with no mechanical vibration or electrical noise during operation.
How much space does the Purewell U01 take up under the sink?
The unit measures 5.7 inches in width and length, with a height of 16 inches. This compact tankless footprint allows it to fit into tight spaces where traditional systems with storage tanks would not. You should verify your cabinet depth and height to ensure a proper fit before purchasing.
What is the daily water production capacity of this system?
The Purewell U01 has a capacity of 800 gallons per day. This rating indicates the system can produce up to 800 gallons of purified water daily under optimal pressure and temperature conditions. This high flow rate supports high-volume usage, allowing you to fill a standard glass in roughly five seconds.
Is the Purewell U01 heavy to install?
The system weighs 8.4 pounds, which is relatively light for a tankless reverse osmosis unit. Its low weight makes it easier to handle during installation compared to heavier systems with large storage tanks. You can secure it to your cabinet wall without needing heavy-duty mounting hardware.
What color is the Purewell U01 filtration unit?
The Purewell U01 features a white finish. This neutral color helps the unit blend in with most under-sink environments and cabinetry. The sleek design complements modern kitchen aesthetics while maintaining a professional appearance behind closed doors.
Who is the Purewell U01 best suited for?
This system is best for space-constrained kitchens needing high flow rates. It suits households prioritizing space savings and consistent purified water for daily use. The tankless design eliminates the need for bulky storage tanks, making it ideal for smaller cabinets or apartments where space is at a premium.
How does the Purewell U01 compare to tank-based RO systems?
Unlike tank-based systems, the Purewell U01 uses a tankless design that saves significant under-sink space. It delivers water on demand without the need for a pressurized storage tank. This approach reduces the footprint while maintaining a high flow rate, making it a more efficient choice for modern, compact kitchens.