The best Viomi smart home appliances in this lineup serve two distinct jobs: most filter drinking water, while one automates floor cleaning. I’d name the VIOMI 800 GPD Tankless Reverse Osmosis System the best overall for shoppers who want high stated output without a storage tank. The V2 Max Robot Vacuum and Mop is the standout for floor care, while the V8 Pro is worth a closer look if a spin-down sediment filter matters to your setup. The main tradeoffs are water output, installation and filter upkeep—not a single feature that suits every home. Read on for the full comparison and guidance on which model fits your needs.
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Key Takeaways
- Five of the six picks are reverse osmosis systems, so water filtration—not whole-home automation—is the focus of this particular Viomi lineup.
- The 800 GPD models are the clearest fit for households that prioritize higher stated production capacity; the 600 GPD options may suit buyers whose demand is more modest.
- A spin-down sediment filter distinguishes the V8 Pro and Pure B6W, but it adds another component to install and maintain.
- The V2 Max Robot Vacuum and Mop is the only floor-care option, making it the natural choice for shoppers who want cleaning automation rather than filtered water.
- Model names alone do not settle the choice: compare installation requirements, replacement-filter availability, and household demand before choosing between similar RO systems.
| VIOMI 800 GPD Tankless Reverse Osmosis Water Filtration System |  | Best for Documented Contaminant Reduction | Purification method: Reverse osmosis | Filtration stages: 9 | Membrane pore size: 0.0001 μm | VIEW LATEST PRICE | See Our Full Breakdown |
| VIOMI V6 Pro 600 GPD Tankless Under-Sink Reverse Osmosis Water Filtration System |  | Best for Smart Monitoring and Appliance Connections | Purification method: Reverse osmosis and carbon block | Filtration stages: 9 | Pure-to-drain ratio: 3:1 | VIEW LATEST PRICE | See Our Full Breakdown |
| VIOMI V2 Max Robot Vacuum and Mop |  | Best for Multi-Floor Cleaning | Cleaning functions: Vacuuming and mopping | Navigation: LDS laser mapping | Map storage: Up to 5 floor maps | VIEW LATEST PRICE | See Our Full Breakdown |
| Viomi V8 Pro 800 GPD Reverse Osmosis System with 40-Micron Spin-Down Sediment Filter |  | Best Premium Connected RO System | Filtration stages: 9 | Glass fill time: 8 oz in 7 seconds | Included sediment filter: 40-micron spin-down | VIEW LATEST PRICE | See Our Full Breakdown |
| VIOMI V8 Tankless Reverse Osmosis Water Filtration System, 800 GPD |  | Best for Tool-Free Filter Changes | Filtration: 9-stage; 0.0001 μm reverse osmosis membrane | Purification method: Reverse osmosis and carbon block | Pure-to-drain ratio: 3:1 | VIEW LATEST PRICE | See Our Full Breakdown |
| VIOMI Pure B6W 600 GPD Under-Sink Reverse Osmosis System with 40-Micron Spin-Down Sediment Filter |  | Best for App-Based Water Monitoring | Model: Pure B6W (B6W) | Purification method: Reverse osmosis | Filtration stages: 7 | VIEW LATEST PRICE | See Our Full Breakdown |
| Viomi smart home appliance | Certifications | Purification method | Filtration stages | Pure-to-drain ratio |
|---|---|---|---|---|
| VIOMI 800 GPD Tankless Reverse | NSF/ANSI 53, 42, and 372 | Reverse osmosis | 9 | 3:1 |
| VIOMI V6 Pro 600 GPD Tankless | NSF/ANSI 42, 53, 58, and 372 | Reverse osmosis and carbon block | 9 | 3:1 |
| VIOMI V2 Max Robot Vacuum and | — | — | — | — |
| Viomi V8 Pro 800 GPD Reverse O | NSF/ANSI 58 and NSF/ANSI 372 | — | 9 | — |
| VIOMI V8 Tankless Reverse Osmo | NSF/ANSI 42, 53, and 372 | Reverse osmosis and carbon block | — | 3:1 |
| VIOMI Pure B6W 600 GPD Under-S | NSF/ANSI 58 and NSF/ANSI 372 | Reverse osmosis | 7 | 2:1 |
More Details on Our Top Picks
VIOMI 800 GPD Tankless Reverse Osmosis Water Filtration System
I’d shortlist this model for buyers who want stated contaminant-reduction figures rather than app features. Its nine-stage filtration, 0.0001 μm membrane, and listed NSF/ANSI 53, 42, and 372 certifications make its filtration story more explicit than the VIOMI V8, whose supplied specifications emphasize capacity and filter convenience. The system is rated for 800 GPD and a 3:1 pure-to-drain ratio, pairing high stated output with less wastewater than less efficient ratios.
The tradeoff is flexibility: unlike the VIOMI V6 Pro and V8 Pro, it is limited to its included faucet and cannot feed a refrigerator or ice maker. Installation also calls for two holes, a dedicated outlet, and room for rear tubing. I’d pick it for a sink-only setup where filtration details matter more than connected-water options.
Pros:- Nine-stage filtration with a 0.0001 μm RO membrane and stated reduction figures for several contaminants.
- Up to 800 GPD capacity with a 3:1 pure-to-drain ratio.
- Tankless format avoids a separate storage tank under the sink.
- Includes an NSF/ANSI-certified faucet.
Cons:- Works only with the included faucet and cannot supply a refrigerator or ice maker.
- Installation needs two holes, a dedicated outlet, and rear tubing clearance.
- Tankless design still takes up under-sink space and may not suit a crowded cabinet.
Best for: Homeowners who want a high-capacity under-sink RO system with stated reduction figures and do not need filtered water routed to an appliance.
Not ideal for: Renters or kitchens without a spare electrical outlet, enough cabinet clearance, or permission to drill two holes; also a poor fit for refrigerator or ice-maker connections.
- Purification method:Reverse osmosis
- Filtration stages:9
- Membrane pore size:0.0001 μm
- Pure-to-drain ratio:3:1
- TDS reduction:Up to 90.35%
- Certifications:NSF/ANSI 53, 42, and 372
- Dimensions:16.3 × 5 × 12.8 in
Our verdict“Choose this model if you want explicit filtration claims and high rated output at a sink, but skip it if you need appliance connections.”
VIOMI V6 Pro 600 GPD Tankless Under-Sink Reverse Osmosis Water Filtration System
The V6 Pro is the most connected choice here: its smart LED faucet shows TDS and filter life, while app monitoring adds another way to track the system. It also supports a separate refrigerator or ice-maker line, a practical advantage over the sink-only VIOMI 800 GPD Tankless system and VIOMI V8. Its nine-stage RO and carbon-block filtration is rated at 600 GPD, with a 3:1 pure-to-drain ratio.
That lower capacity is the main compromise beside the 800 GPD V8 Pro and other 800 GPD models, though the supplied data says it fills an 8 oz glass in about nine seconds. Appliance tubing is not included, and installation still needs two drilled holes and an outlet that is not shared with a switched garbage disposer. I’d choose it for monitoring and routing flexibility, not maximum rated flow.
Pros:- Smart LED faucet displays TDS and filter life, with additional app monitoring.
- Can supply a separate refrigerator or ice-maker line with suitable tubing.
- Nine-stage RO and carbon-block filtration with a 3:1 pure-to-drain ratio.
- Rated to fill an 8 oz glass in about nine seconds.
Cons:- 600 GPD rated capacity is below the 800 GPD VIOMI V8 Pro and other 800 GPD options.
- Refrigerator or ice-maker tubing is not included.
- Installation requires two holes and a dedicated outlet rather than a switched disposer outlet.
Best for: Connected-home owners who want water-quality and filter-life information at the faucet or in an app, plus the option to supply a refrigerator or ice maker.
Not ideal for: Buyers prioritizing the highest stated capacity, or anyone unwilling to source tubing and arrange a dedicated electrical outlet.
- Purification method:Reverse osmosis and carbon block
- Filtration stages:9
- Pure-to-drain ratio:3:1
- Certifications:NSF/ANSI 42, 53, 58, and 372
- Maximum supported TDS:800 ppm
- Filter life:RO filter: 2 years; PCB filter: 1 year
- Dimensions and weight:16.3 × 5 × 12.8 in; 20.1 lb
Our verdict“Pick the V6 Pro if app visibility and appliance routing matter more to you than matching the lineup’s highest rated capacity.”
VIOMI V2 Max Robot Vacuum and Mop
The V2 Max brings a different kind of smart-home convenience to this mostly water-filtration roundup: it handles both vacuuming and mopping, with LDS laser mapping that can store up to five floor plans. That makes it a better match for multi-level homes than any of the under-sink VIOMI systems, which address drinking water rather than floor care. Its Y-pattern mopping is designed to cover hard floors in a more deliberate path than a simple back-and-forth pass.
Four suction modes and up to 2400 Pa give it some flexibility across carpet and hard flooring, while app scheduling and Alexa control support routine cleaning. The limits are practical: the 0.55-liter dust bin may need frequent emptying in dirtier homes, and Wi-Fi support is only 2.4 GHz. I’d choose it for map-based cleaning across several floors, not for a large debris load or 5 GHz-only network.
Pros:- Stores up to five LDS laser maps, suiting homes with multiple floors.
- Combines vacuuming and mopping, including Y-pattern mopping for hard floors.
- Offers four suction modes and up to 2400 Pa suction.
- Supports app scheduling and Amazon Alexa voice control.
Cons:- 0.55-liter dust capacity may mean more frequent bin emptying in busy or pet-heavy homes.
- Wi-Fi compatibility is limited to 2.4 GHz.
- The combination dust box and dual water tanks require attention when switching between cleaning tasks.
Best for: Households with multiple mapped floors, mixed hard flooring and carpet, and a 2.4 GHz Wi-Fi network.
Not ideal for: People with 5 GHz-only Wi-Fi or homes where a small dust bin would require too-frequent emptying.
- Cleaning functions:Vacuuming and mopping
- Navigation:LDS laser mapping
- Map storage:Up to 5 floor maps
- Maximum suction:Up to 2400 Pa
- Suction modes:4
- Dust capacity:0.55 liters
- Controls and compatibility:App and voice control; Amazon Alexa
- Wi-Fi compatibility:2.4 GHz
Our verdict“Choose the V2 Max for mapped vacuum-and-mop routines across several floors, but skip it if your network lacks 2.4 GHz support.”
Viomi V8 Pro 800 GPD Reverse Osmosis System with 40-Micron Spin-Down Sediment Filter
The V8 Pro combines the lineup’s 800 GPD rated capacity with a smart LCD faucet, app monitoring, pre-installed filters, and an included 40-micron spin-down sediment filter. That package makes it a more connected and installation-ready proposition than the basic VIOMI 800 GPD Tankless system, while its standard tubing option can route filtered water to a refrigerator or ice maker. The stated 7-second fill time for an 8 oz glass is the quickest fill figure supplied among these RO models.
Its added features do not remove the installation demands: the unit needs a standard outlet, drilled faucet and drain holes, and rear clearance for tubing. Refrigerator tubing is not included, and the stated certifications here are NSF/ANSI 58 and 372 rather than the broader set listed for the V6 Pro. I’d favor it when monitoring and appliance routing are priorities, but not for a plug-and-play kitchen.
Pros:- Rated at 800 GPD, with a stated 7-second fill time for an 8 oz glass.
- LCD smart faucet and app provide water-quality, filter-life, and usage information.
- Includes a 40-micron spin-down sediment filter and pre-installed filters.
- Can connect to a separate refrigerator or ice-maker line.
Cons:- Refrigerator or ice-maker tubing is not included.
- Installation requires drilled faucet and drain holes, an outlet, and rear tubing clearance.
- The supplied certification list is narrower than the V6 Pro’s listed certifications.
Best for: Homeowners seeking an 800 GPD tankless RO system with app and faucet monitoring, an included sediment prefilter, and an appliance-line option.
Not ideal for: Buyers who cannot drill sink or drain holes, lack cabinet clearance or a suitable outlet, or want refrigerator tubing supplied in the box.
- Filtration stages:9
- Glass fill time:8 oz in 7 seconds
- Included sediment filter:40-micron spin-down
- Certifications:NSF/ANSI 58 and NSF/ANSI 372
- Filter life:RO filter: up to 2 years; PCB filter: up to 1 year, plus one extra PCB filter
- System dimensions:16.3 × 5 × 12.8 in
- Installation requirements:Standard outlet; 1–1.5 in faucet hole and 1/4 in drain hole
Our verdict“Choose the V8 Pro for a feature-rich 800 GPD setup with monitoring and appliance routing, provided your kitchen can accommodate its installation.”
VIOMI V8 Tankless Reverse Osmosis Water Filtration System, 800 GPD
The VIOMI V8 is the straightforward high-capacity pick for buyers who want 800 GPD output and tool-free filter replacement without paying attention to app features or appliance routing. Like the VIOMI 800 GPD Tankless system, it uses nine-stage filtration, a 0.0001 μm membrane, and a 3:1 pure-to-drain ratio. Its listed NSF/ANSI 42, 53, and 372 certifications and stated contaminant targets give buyers concrete filtration details; the LED faucet also signals when a filter needs replacement.
Compared with the V8 Pro, the standard V8 gives up app monitoring and the refrigerator or ice-maker connection option. It is also limited to the included faucet, and installation needs two holes, an outlet, and adequate tubing clearance. The stated filter life of up to four years depends on consumption and use, so I would not treat it as a fixed replacement schedule. It suits buyers who value simpler maintenance over connected features.
Pros:- Up to 800 GPD capacity with a 3:1 pure-to-drain ratio.
- Nine-stage filtration with a 0.0001 μm membrane and stated contaminant-reduction targets.
- Tool-free filter replacement and an LED faucet filter alert.
- Tankless under-sink design avoids a separate storage tank.
Cons:- Only works with the included faucet and cannot connect to a refrigerator or ice maker.
- Requires two holes, a dedicated outlet, and enough room for tubing under the sink.
- Filter life varies with water consumption and usage, despite the stated maximum of up to four years.
Best for: Homeowners who want an 800 GPD tankless RO system with tool-free filter changes and a filter-alert faucet, but no app or appliance connection.
Not ideal for: Buyers who want app monitoring, a refrigerator or ice-maker feed, or a system that avoids drilling and electrical work.
- Filtration:9-stage; 0.0001 μm reverse osmosis membrane
- Purification method:Reverse osmosis and carbon block
- Pure-to-drain ratio:3:1
- Filter life:Up to 4 years
- Included filters:1 RO filter and 2 PCB filters
- Certifications:NSF/ANSI 42, 53, and 372
- Dimensions and weight:16.3 × 5 × 12.8 in; 27.5 lb
Our verdict“Pick the V8 if tool-free maintenance and high rated output matter more than app monitoring or appliance connections.”
VIOMI Pure B6W 600 GPD Under-Sink Reverse Osmosis System with 40-Micron Spin-Down Sediment Filter
The VIOMI Pure B6W is the clearest fit for buyers who want to track their water system, not just install it and forget it. Its app reports filter life, water quality, and consumption, while the seven-stage process and 600 GPD reverse-osmosis membrane are aimed at reducing contaminants including PFOS, PFOA, arsenic, nitrate, and fluoride. Compared with the VIOMI 800 GPD Tankless Reverse Osmosis Water Filtration System, the B6W has a lower stated daily capacity, so the faster-output model may suit heavier household demand better. The B6W instead pairs its tankless design with a stated 2:1 pure-to-drain ratio and a refrigerator or ice-maker connection option. That connection needs compatible tubing, which is not included; installation also calls for drilled holes and a standard outlet, with a dedicated outlet needed alongside a garbage disposer.
Pros:- App monitoring covers filter life, water quality, and consumption.
- Seven-stage filtration includes a high-precision reverse-osmosis membrane.
- Tankless layout has a stated 2:1 pure-to-drain water ratio.
- Can connect to a compatible refrigerator or ice maker.
Cons:- Compatible refrigerator or ice-maker tubing is not included.
- Installation requires drilled holes and access to a standard outlet.
- A dedicated outlet is required if installed with a garbage disposer.
Best for: Households that want app visibility into filter life and water use, plus the option to supply a compatible refrigerator or ice maker.
Not ideal for: Renters or buyers who cannot drill into the sink area, lack a nearby outlet, or need higher stated capacity than 600 GPD.
- Model:Pure B6W (B6W)
- Purification method:Reverse osmosis
- Filtration stages:7
- Stated capacity:600 GPD
- Installation type:Under sink
- Pure-to-drain ratio:2:1
- Certifications:NSF/ANSI 58 and NSF/ANSI 372
- Refrigerator connection:Compatible tubing connection; tubing not included
- Power requirement:Standard outlet
Our verdict“Choose the B6W if app-based upkeep tracking and a 2:1 water ratio matter more to you than the higher stated capacity of Viomi’s 800 GPD systems.”
How We Picked
I ranked these appliances by how clearly each one serves a distinct household need, then weighed buyer-facing factors: stated water-production capacity, tankless versus under-sink system format, inclusion of a spin-down sediment filter, and the role each product plays in a home. Capacity is a useful comparison point, but it is not a guarantee of the water flow a household will experience; installation conditions and usage affect the result. I also considered the practical burden of fitting and maintaining each system, since those details can matter more over time than a headline specification.
The VIOMI 800 GPD Tankless Reverse Osmosis System ranks first as a straightforward high-capacity pick among the similar water systems. The V2 Max ranks as the clear floor-care choice rather than competing directly with filtration units. Models with an added sediment filter earn a distinct place for buyers who value that component, while the 600 GPD systems remain relevant for shoppers with lower demand. Product details supplied for this roundup do not establish comparative filtration certifications, measured flow under household conditions, or maintenance costs, so I do not treat those as proven advantages.
| Viomi smart home appliance | Purification method | Certifications | Filter life |
|---|---|---|---|
| VIOMI 800 GPD Tankless Reverse | Reverse osmosis | NSF/ANSI 53, 42, and 372 | — |
| VIOMI V6 Pro 600 GPD Tankless | Reverse osmosis and carbon block | NSF/ANSI 42, 53, 58, and 372 | RO filter: 2 years; PCB filter: 1 year |
| VIOMI V2 Max Robot Vacuum and | — | — | — |
| Viomi V8 Pro 800 GPD Reverse O | — | NSF/ANSI 58 and NSF/ANSI 372 | RO filter: up to 2 years; PCB filter: up to 1 year, plus one extra PCB filter |
| VIOMI V8 Tankless Reverse Osmo | Reverse osmosis and carbon block | NSF/ANSI 42, 53, and 372 | Up to 4 years |
| VIOMI Pure B6W 600 GPD Under-S | Reverse osmosis | NSF/ANSI 58 and NSF/ANSI 372 | — |
Factors to Consider When Choosing Best Viomi Smart Home Appliances
These products are not interchangeable: choosing between a water system and a robot vacuum comes before comparing specifications. Once you know which job you want to automate, use the following factors to check whether a model suits your home beyond its name or stated capacity.
Start With the Job You Want Done
Five entries filter drinking water, while the V2 Max handles floor cleaning, so begin by deciding which household task you want to address. A filtration system will not reduce vacuuming, and a robot vacuum will not improve tap water. If both needs matter, compare the cost and setup of each appliance separately rather than treating this list as six versions of one product. Also check whether your intended use is point-of-use drinking water or broader household water treatment; under-sink RO systems are not a substitute for whole-home filtration. Matching the appliance to the job prevents a feature-rich product from solving the wrong problem.
Treat GPD as a Comparison Point, Not a Promise
GPD refers to a stated daily production capacity, and the 800 GPD models sit above the 600 GPD options on that measure. That difference can help narrow choices if several people draw filtered water throughout the day, but it does not tell you exactly how quickly a faucet will run in your kitchen. Water pressure, temperature, installation, and the system’s operating conditions can affect real-world output. Avoid choosing solely by the largest number if your household has modest demand or limited installation space. Check the manufacturer’s specifications and installation guidance for conditions behind the rating before making a capacity-based decision.
Check the Entire Installation Path
Under-sink water systems need a suitable cabinet, plumbing connections, and room for the unit and its tubing. Before ordering, measure the available space and review whether the installation needs a dedicated faucet, a drain connection, or other changes. A tankless design removes the need to accommodate a separate storage tank, but it does not remove plumbing work. Sediment-filter add-ons may require additional space and connections, so the V8 Pro and Pure B6W deserve a closer fit check. If you rent or do not want to modify plumbing, confirm installation rules and consider whether a qualified installer is needed.
Compare Filter Upkeep Before You Commit
Reverse osmosis systems rely on replaceable filtration components, so the purchase decision should include the long-term task of sourcing and changing filters. Look up replacement intervals, compatible filter part numbers, and how the system signals or documents maintenance. A spin-down sediment filter can add a stage intended to catch larger particles, but it also creates another component to inspect and service. Do not assume every Viomi model uses the same replacement parts just because the names are similar. Buyers who prefer fewer maintenance steps may favor a simpler setup, while those who want added prefiltration should be comfortable caring for it.
Match the Appliance to Your Home’s Constraints
For water systems, household size, cooking habits, and how often several people need filtered water can help you judge whether 600 or 800 GPD is a more sensible starting point. For the V2 Max, floor layout, thresholds, rugs, and furniture are more relevant than water-system specifications. Check the robot’s supported floor types and navigation details in its current product documentation, since the supplied product name alone does not answer those questions. Noise, storage, and access to replacement parts also affect whether an appliance fits daily routines. A careful fit check can matter more than choosing the model with the broadest-sounding feature list.
Pay More Only for a Feature You Will Use
Higher stated output or an added sediment-filter component can be useful, but neither is automatically better for every household. Decide what problem the extra capacity or filtration stage solves in your home, then confirm the specification is supported by the manufacturer’s current documentation. The V8 Pro and Pure B6W make most sense when their sediment-filter arrangement suits your water conditions and maintenance preferences. A buyer who does not need that setup may prefer to compare the more straightforward tankless options instead. For any model, factor in installation and replacement filters alongside the appliance itself when judging overall value.
Frequently Asked Questions
Which Viomi model should I choose if I want filtered water rather than floor cleaning?
Choose among the five reverse osmosis systems, not the V2 Max Robot Vacuum and Mop. The 800 GPD models are the higher-capacity group by their stated ratings, while the V6 Pro and Pure B6W are listed at 600 GPD. If you want a spin-down sediment filter included, compare the V8 Pro and Pure B6W; if not, review the other tankless options. Check installation requirements and replacement-filter details before picking a model, since those can be more consequential than the name.
Is an 800 GPD system automatically a better choice than a 600 GPD model?
No. The 800 GPD rating indicates a higher stated capacity, but it does not by itself prove that a system will deliver a particular flow rate in your kitchen. A smaller household may have no practical need for the higher rating, while a busy home may value the extra stated capacity. Compare the manufacturer’s operating conditions and your daily water demand instead of choosing by the number alone. Installation conditions can also affect actual performance.
Should I choose a model with a 40-micron spin-down sediment filter?
It may suit buyers who want a sediment-filter component included before the RO system, but it is not a universal requirement. The V8 Pro and Pure B6W list this feature, giving them a different setup from the other water systems in this roundup. The added component also means another installation detail and a maintenance task to understand. Check your water conditions and the manufacturer’s guidance to see whether this filter addresses a real need in your home.
What should I verify before installing a Viomi under-sink RO system?
Measure the cabinet and check the current installation manual for plumbing, faucet, drain, and clearance requirements. Confirm that your home’s water pressure and supply conditions fall within the manufacturer’s stated range. Find out whether installation can be completed with existing connections or calls for a professional. Before purchase, check replacement-filter availability and the maintenance schedule for the exact model, since similar Viomi names do not guarantee interchangeable parts.
Can I compare the V2 Max Robot Vacuum and Mop directly with the water systems?
Only at the broad level of deciding which household task matters more; they solve different problems. The V2 Max is the only floor-care appliance in this lineup, whereas the other five are water filtration systems. For the robot, check current documentation for floor compatibility, navigation, obstacle handling, and upkeep—details not established by its name alone. If your main goal is drinking-water filtration, compare the RO units instead; if your priority is reducing routine floor cleaning, focus on the V2 Max.
Conclusion
My best overall pick is the VIOMI 800 GPD Tankless Reverse Osmosis Water Filtration System for shoppers seeking a higher stated-capacity tankless option. For best value, compare the 600 GPD V6 Pro or Pure B6W against your actual water demand and filter needs rather than paying for capacity you may not use. The best premium-style feature choice is the V8 Pro if its added spin-down sediment filter suits your water conditions and you accept the extra upkeep. For beginners, start with the simplest installation and maintenance plan you can confirm in the product documentation; the supplied details do not establish a single easiest model. For specific floor-care needs, choose the V2 Max, the only robot vacuum and mop here. Match the appliance to the job first, then verify fit, maintenance, and manufacturer specifications before deciding.
