Looking Beyond the Brio SIMPL 400 GPD 4-Stage? 6 Alternatives Worth a Look
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The Brio SIMPL 400 GPD 4-Stage RO delivers efficient filtration in a compact, tankless design. It produces 400 gallons per day with a 1:1 pure-to-waste ratio. This system fits under-sink spaces well and removes dirt, rust, chlorine, VOCs, and fine silts. Its sealed waterway reduces leak risks and saves space compared to traditional tank models. You might look for brio simpl 400 gpd 4 stage alternatives if you need different features. Some users prefer alkaline filtration for higher pH water. Others may require a countertop unit to avoid plumbing work. Portable options suit RVs or boats where space is tight. These alternatives were chosen because their specs overlap with the original. They offer similar capacities or installation types. The list includes seven options ranked by practical value. You can compare dimensions, stages, and design features to find the right fit. Each system addresses specific needs like visible filter monitoring or plug-in convenience. The selection covers under-sink, countertop, and portable configurations. This variety helps you match the system to your water quality goals and available space.
How each alternative compares
Waterdrop G2 400 GPD Tankless RO
The Waterdrop G2 shares the 400 GPD tankless design but is slightly wider and deeper. It weighs 25 pounds, making it heavier than the Brio. You get a white finish instead of brushed nickel. This model is best for users who want a budget-friendly option under the sink. It offers similar flow rates and space savings. However, it lacks the specific NSF 372 certification mentioned for the Brio. Choose this if you prioritize cost and standard under-sink installation over certified material safety standards. It fits most standard cabinets but requires checking your specific clearance dimensions due to its footprint.
SimPure T1-400ALK Alkaline RO System
The SimPure T1-400ALK adds an alkaline filter stage to its 400 GPD tankless design. This system increases pH levels, offering mineral-enhanced water. The Brio focuses on pure removal without added minerals. The SimPure is taller and slightly narrower than the Brio. You should pick this if you prefer alkaline water for taste or health reasons. It is not suitable if you want low-TDS pure water. The alkaline feature changes the water chemistry significantly. This system is ideal for users who value enhanced mineral content over the straightforward purification provided by the Brio SIMPL. It fits well in standard under-sink spaces but requires space for the additional filtration stage.
Purewell C01 Countertop 4-Stage RO
The Purewell C01 is a countertop system, unlike the under-sink Brio. It requires no plumbing installation, making it ideal for renters or offices. It includes an alkaline filter and digital monitoring. The Brio is built for permanent under-sink setup with a faucet. The Purewell is larger and sits on a counter. Choose this if you cannot drill holes or connect to water lines. It offers immediate filtered water without installation hassles. However, it does not save under-sink space. The countertop design takes up valuable counter area. This option is best for those who need flexibility and do not want permanent modifications to their kitchen or workspace.
WECO TINY-36 Portable RO System
The WECO TINY-36 is a portable system designed for RVs, boats, or small spaces. It is compact and lightweight compared to the Brio. The Brio is a fixed under-sink unit. The WECO offers flexibility for mobile living. You should choose this if you need a filtration solution that moves with you. It is not suitable for permanent home installation. The portable design sacrifices some convenience for mobility. It fits in tight spaces where a standard under-sink unit would not. This system is best for travelers or those in temporary housing who need reliable water purification without permanent plumbing connections.
AquaTru Glass Carafe Countertop RO
The AquaTru is a countertop carafe system requiring only a power outlet. It does not need plumbing, unlike the Brio. It is smaller and lighter than the Brio. This system is ideal for renters who cannot install under-sink units. You get certified purification without permanent installation. However, it has lower capacity and slower flow than the Brio. Choose this if you prioritize ease of setup over high volume. The carafe design is convenient for small households. It does not save under-sink space. This option is best for users who need plug-and-play purification and do not require the high daily output of the Brio SIMPL.
iSpring RCC2 200 GPD Under Sink RO
The iSpring RCC2 is a 200 GPD under-sink system with five stages. It has lower capacity than the Brio but offers more filtration stages. It includes visible filter monitoring and targets lead and fluoride removal. The Brio focuses on higher flow and VOC removal. Choose this if you prioritize visible maintenance cues and thorough contaminant reduction over volume. It is best for homes with specific lead or fluoride concerns. The five-stage design provides more comprehensive filtration. However, the lower GPD means slower refill rates. This system fits well in standard under-sink spaces but requires more frequent filter changes due to the additional stages.
Quick picks
Our 7 picks
Brio SIMPL 400 GPD 4-Stage RO
Best for: Space-constrained under-sink installations
- Filtration Stages
- 4
- Capacity (GPD)
- 400 GPD
- Design
- Tankless
- Pure to Drain Ratio
- 1:1
- Certification
- NSF 372
- Filtration Type
- Reverse osmosis
View on Amazon: Brio SIMPL 400 GPD 4-Stage RO Affiliate link
The Brio SIMPL is a 400 GPD under-sink reverse osmosis system with a tankless design. It uses a 4-stage filtration process to remove dirt, rust, chlorine, VOCs, and fine silts. The unit maintains a 1:1 pure-to-waste ratio and features a compact footprint that saves space. It includes a brushed nickel faucet and color-coded installation tubes. This system suits households seeking efficient water purification without a storage tank.
Pros
- 400 GPD capacity with 1 LPM flow rate
- Tankless design saves up to 70% of under-sink space
- 1:1 pure-to-waste water ratio
- 4-stage filtration removes chlorine, VOCs, and silts
- NSF 372 certified for lead-free materials
Cons
- Only removes standard contaminants, not heavy metals or fluoride
- Requires under-sink installation, not countertop
- No alkaline remineralization stage included
Good fit if
- You need high daily output without a bulky tank
- You want a straightforward 4-stage filtration setup
- You prefer a 1:1 water efficiency ratio
Skip if
- You require countertop portability
- You need alkaline or mineral enhancement
- You want to remove fluoride or heavy metals
Verdict: The Brio SIMPL 400 GPD Tankless RO offers a space-saving, efficient solution for standard contaminant removal. It fits users who prioritize flow rate and compact installation over advanced mineralization.
Waterdrop G2 400 GPD Tankless RO
Best for: space-saving under-sink installations with power access
- Filtration Stages
- 7
- Capacity (GPD)
- 400 GPD
- Design
- Tankless
- Pure to Drain Ratio
- 1:1
- Certification
- NSF/ANSI 372
- Filtration Type
- Reverse Osmosis
View on Amazon: Waterdrop G2 400 GPD Tankless RO Affiliate link
The Waterdrop G2 is a tankless reverse osmosis system with a 400 GPD capacity. It features seven filtration stages and holds NSF/ANSI 372 certification for lead-free materials. The unit operates with a 1:1 pure-to-drain ratio, which reduces water waste. Its integrated design saves under-sink space. You need an electrical outlet and drilled holes for installation. This model suits those seeking high flow rates without a storage tank.
Pros
- 400 GPD flow rate for quick water access
- 7-stage filtration with NSF/ANSI 372 certification
- 1:1 pure-to-drain ratio saves water
- Tankless design saves under-sink storage space
Cons
- Requires an electrical outlet for operation
- Needs drilled holes for installation
- No alkaline remineralization stage listed
Good fit if
- You want a tankless system to save cabinet space
- You need a high 400 GPD flow rate
- You prefer a 1:1 drain ratio to conserve water
Skip if
- You cannot drill holes in your counter
- You lack an electrical outlet under the sink
- You want a countertop unit without installation
Verdict: Waterdrop G2 400 GPD Tankless RO delivers efficient filtration and space savings for homes with under-sink power. It fits users who prioritize flow speed and water conservation over alkaline added benefits.
SimPure T1-400ALK Alkaline RO System
Best for: Mineral-enhanced alkaline water needs
- Capacity (GPD)
- 400
- Design
- Under sink
- Pure to Drain Ratio
- 1.5:1
- Certification
- NSF/ANSI 58
- Filtration Type
- Reverse osmosis
- Installation Type
- Under sink
View on Amazon: SimPure T1-400ALK Alkaline RO System Affiliate link
The SimPure T1-400ALK is an under-sink reverse osmosis system with a 400 GPD tankless design. It carries NSF/ANSI 58 certification and removes over 99.99% of contaminants. The unit includes an alkaline filter to restore minerals and raise pH. It operates with a 1.5:1 pure-to-drain ratio. This system suits you if you want mineral-enhanced water and compact under-sink storage without a storage tank.
Pros
- NSF/ANSI 58 certified by SGS for contaminant removal
- Alkaline filter adds calcium, magnesium, and potassium
- Tankless design saves under-sink space
- 1.5:1 pure-to-drain water efficiency ratio
Cons
- Higher TDS levels due to mineral addition
- 17.6 pounds weight requires sturdy mounting
- UV power operates on flow pressure only
Good fit if
- You want alkaline water with added minerals
- You need a compact tankless under-sink unit
- You prefer certified contaminant removal
Skip if
- You require zero TDS water
- You want a countertop or portable unit
- You need a system with a storage tank
Verdict: SimPure T1-400ALK Tankless Alkaline RO delivers certified purification with mineral enhancement for users who prefer higher pH water. It fits under-sink spaces well but is not suitable for those seeking pure, low-TDS output.
Purewell C01 Countertop 4-Stage RO
Best for: countertop use without plumbing
- Filtration Stages
- 4
- Design
- Countertop
- Pure to Drain Ratio
- 3.5:1
- Filtration Type
- Reverse osmosis, alkaline
- Contaminants Removed
- Chlorine, fluoride, lead, arsenic, TDS
- Installation Type
- Countertop
View on Amazon: Purewell C01 Countertop 4-Stage RO Affiliate link
This countertop reverse osmosis unit uses a 0.0001-micron membrane and alkaline filtration to remove contaminants and adjust pH. It features a 4.5-liter removable tank and a smart touch panel that displays real-time TDS levels and filter life. The system requires no installation and offers four preset dispensing volumes. Its compact footprint and portable pitcher make it suitable for offices or RVs where under-sink plumbing is unavailable.
Pros
- 4-stage filtration with alkaline enhancement
- 0.0001-micron RO membrane rating
- Smart touch panel with TDS monitoring
- Removable 4.5-liter water tank
Cons
- Countertop design requires significant counter space
- 19-pound weight limits portability
- No under-sink plumbing integration
Good fit if
- You need a water system without plumbing installation
- You want real-time TDS monitoring on a display
- You prefer alkaline-enhanced water quality
Skip if
- You require a high-capacity 400 GPD system
- You need an under-sink mounted unit
- You want a tankless design
Verdict: Purewell C01 Countertop RO System suits renters or office workers who need immediate access to filtered water without installing plumbing. It delivers alkaline filtration and digital monitoring in a self-contained unit.
WECO TINY-36 Portable RO System
Best for: RVs, boats, and small spaces
- Filtration Stages
- 4
- Pure to Drain Ratio
- 1:1
- Filtration Type
- Reverse Osmosis (TFC Membrane)
- Design
- Portable
- Dimensions
- 15 × 5.5 × 9 inches
- Weight
- 19.3 pounds
View on Amazon: WECO TINY-36 Portable RO System Affiliate link
The WECO TINY-36 is a compact 4-stage reverse osmosis system designed for portable use. It features a 36-gallon storage tank and a low 1:1 waste water ratio. Its small footprint, measuring 5.5 by 9 by 15 inches, allows installation in tight spaces like RVs or boats. This unit suits you if you need flexible placement and efficient water usage without a permanent under-sink setup.
Pros
- Compact 5.5 by 9 by 15 inch footprint for flexible placement
- 36-gallon pressurized tank for stored purified water
- 1:1 waste water ratio for high efficiency
- 4-stage filtration removes up to 99% of contaminants
Cons
- Requires a 36-gallon storage tank, adding bulk
- Not a tankless design, limiting counter space savings
- Heavier at 19.3 pounds, making relocation difficult
Good fit if
- You need a system for an RV or boat
- You want a low waste water ratio
- You have space for a 36-gallon tank
Skip if
- You require a tankless under-sink design
- You need a system under 15 pounds
- You want a faucet with a different finish than brushed nickel
Verdict: The WECO TINY-36 Portable RO System fits you if you need a flexible, efficient filtration solution for mobile living spaces like RVs. Its small size and low waste ratio make it a practical option for portable setups.
AquaTru Glass Carafe Countertop RO
Best for: renters needing plug-in purification
- Filtration Stages
- 4
- Design
- Countertop
- Certification
- NSF
- Filtration Type
- Reverse osmosis
- Installation Type
- Countertop
- Dimensions
- 5.25 × 1.5 × 13.5 inches
View on Amazon: AquaTru Glass Carafe Countertop RO Affiliate link
The AquaTru Carafe is a countertop reverse osmosis system that requires no plumbing or drilling. It uses a 4-stage filtration process to remove contaminants like microplastics and fluoride. The unit sits on your counter and dispenses purified water into a glass carafe. It is designed for renters or those who cannot modify their kitchen. The system plugs into a standard outlet for easy use.
Pros
- No plumbing or drilling required
- 4-stage reverse osmosis filtration
- NSF certified by IAPMO
- Dispenses into a glass carafe
Cons
- Countertop footprint occupies counter space
- Manual refill needed for the tank
- 1-year warranty is shorter than competitors
Good fit if
- You rent and cannot drill holes
- You need pure water for coffee or tea
- You want a plug-in system
Skip if
- You need high daily water volume
- You want an under-sink installation
- You prefer a tankless design
Verdict: AquaTru Countertop RO System fits users who need certified purification without permanent installation. It suits those prioritizing ease of setup over high capacity.
iSpring RCC2 200 GPD Under Sink RO
Best for: visible filter monitoring and lead reduction
- Filtration Stages
- 5
- Capacity (GPD)
- 200
- Design
- Under sink
- Filtration Type
- Reverse osmosis
- Installation Type
- Under sink
- Capacity
- 200 GPD
View on Amazon: iSpring RCC2 200 GPD Under Sink RO Affiliate link
The iSpring RCC2 is a 5-stage under sink reverse osmosis system with a 200 GPD membrane. It reduces TDS, PFAS, chlorine, lead, and fluoride. The transparent first-stage housing lets you monitor filter buildup. A patented top-mounted faucet fastener simplifies countertop installation. It runs without electricity and includes a check valve. This compact unit suits households needing reliable contaminant removal.
Pros
- 5-stage filtration reduces over 1,000 contaminants including lead and PFAS
- Transparent first-stage housing allows visual monitoring of filter buildup
- Patented top-mounted faucet fastener simplifies installation without reaching under the counter
- Runs without electricity and includes a built-in check valve to prevent backflow
Cons
- 200 GPD capacity is lower than the 400 GPD options on this list
- Does not include an alkaline remineralization stage in the base configuration
- No tank is mentioned in the specifications, implying slower immediate flow
Good fit if
- You want to visually monitor the condition of your pre-filter
- You need a system that reduces fluoride and lead
- You prefer a compact unit that fits under most sinks
Skip if
- You require a higher flow rate than 200 gallons per day
- You want alkaline remineralization to adjust pH levels
- You need a tankless system for instant water access
Verdict: The iSpring RCC2 200 GPD 5-Stage RO is a practical choice for users who prioritize visible maintenance cues and thorough contaminant reduction over high-volume output. It fits well in standard under-sink spaces where fluoride and lead removal are priorities.
Specifications side by side
| Spec | Brio SIMPL 400 GPD 4-Stage RO | Waterdrop G2 400 GPD Tankless RO | SimPure T1-400ALK Alkaline RO System | Purewell C01 Countertop 4-Stage RO | WECO TINY-36 Portable RO System | AquaTru Glass Carafe Countertop RO | iSpring RCC2 200 GPD Under Sink RO |
|---|---|---|---|---|---|---|---|
| Filtration Stages | 4 | 7 | not stated | 4 | 4 | 4 | 5 |
| Capacity (GPD) | 400 GPD | 400 GPD | 400 | not stated | not stated | not stated | 200 |
| Design | Tankless | Tankless | Under sink | Countertop | not stated | Countertop | Under sink |
| Pure to Drain Ratio | 1:1 | 1:1 | 1.5:1 | 3.5:1 | 1:1 | not stated | not stated |
| Certification | NSF 372 | NSF/ANSI 372 | NSF/ANSI 58 | not stated | not stated | NSF | not stated |
| Filtration Type | Reverse osmosis | Reverse Osmosis | Reverse osmosis | Reverse osmosis, alkaline | Reverse Osmosis (TFC Membrane) | Reverse osmosis | Reverse osmosis |
| Contaminants Removed | PFAS, VOCs, heavy metals, chlorine | not stated | not stated | Chlorine, fluoride, lead, arsenic, TDS | not stated | not stated | not stated |
| Installation Type | Under sink | Under sink | Under sink | Countertop | not stated | Countertop | Under sink |
| Features | not stated | not stated | not stated | Smart touch panel, filter life alert | not stated | not stated | not stated |
| Micron Rating | 0.0001 micron | not stated | not stated | 0.0001 micron | not stated | not stated | not stated |
| Capacity | 400 GPD | 400 GPD | 400 GPD | not stated | not stated | not stated | 200 GPD |
| Use | not stated | not stated | not stated | Home | not stated | not stated | not stated |
| Color | not stated | White | not stated | not stated | TINY-36 | not stated | Brushed Nickel Faucet |
| Dimensions | 14 × 5.2 × 13.8 inches | 17.3 × 5.9 × 14 inches | 15.6 × 5.3 × 15.7 inches | 16.5 × 9 × 14.8 inches | 15 × 5.5 × 9 inches | 5.25 × 1.5 × 13.5 inches | 15.5 × 5 × 18 inches |
| Weight | 17.2 pounds | 25 pounds | 17.6 pounds | 19 pounds | 19.3 pounds | 14.7 pounds | 26 pounds |
| Size | 400 GPD | 400 GPD | 15.6" x 5.3" x 15.7" | not stated | not stated | not stated | not stated |
| Model | TROM400STD | WD-G2-W | T1-400ALK | C01-1 | TINY-36 | AquaTru Carafe | RCC2 |
Frequently asked questions
Is the Waterdrop G2 better than the Brio SIMPL for tight spaces?
The Waterdrop G2 is slightly bulkier than the Brio SIMPL. It measures 17.3 inches in length and 5.9 inches in width, compared to the Brio’s 14-inch length and 5.2-inch width. If your under-sink cabinet has limited depth, the Brio’s compact footprint may fit more easily. Both systems offer 400 GPD capacity.
Does the SimPure T1-400ALK add minerals like the Brio does?
The SimPure T1-400ALK includes an alkaline filter to enhance water pH, which the standard Brio SIMPL does not. The Brio focuses on removing contaminants without adding minerals back. If you prefer higher pH water, the SimPure is a suitable alternative. It maintains the same 400 GPD tankless design for consistent flow.
Can I use the Purewell C01 without plumbing installation?
Yes, the Purewell C01 is a countertop system that requires no permanent plumbing. It sits on your counter and connects to a faucet for immediate filtered water. This makes it ideal for renters or offices. Unlike the Brio, which mounts under the sink, the Purewell is self-contained and portable.
Is the WECO TINY-36 suitable for RVs or boats?
The WECO TINY-36 is designed for portable use in mobile spaces like RVs and boats. Its compact dimensions and lightweight build make it easy to transport. The Brio SIMPL is larger and intended for fixed under-sink installation. If you need flexibility for travel, the WECO offers a practical, space-saving solution.
Does the AquaTru Glass Carafe replace the need for under-sink systems?
The AquaTru is a countertop system that requires no plumbing, making it a good alternative to under-sink units like the Brio. It filters water directly in its carafe. While it has a lower capacity than the Brio’s 400 GPD, it offers certified purification for users who prioritize easy setup over high volume.
Is the iSpring RCC2 better for lead reduction than the Brio?
The iSpring RCC2 features a 5-stage filtration process that emphasizes lead and fluoride removal. The Brio SIMPL uses a 4-stage system focused on general contaminant removal. If your primary concern is reducing lead, the iSpring’s additional stage and visible maintenance cues make it a strong choice for health-conscious households.
Which alternative is the lightest to install under the sink?
The Brio SIMPL weighs 17.2 pounds, making it one of the lighter options. The SimPure T1-400ALK is slightly heavier at 17.6 pounds. The Waterdrop G2 is significantly heavier at 25 pounds. For easy handling during installation, the Brio or SimPure models are more manageable than the heavier Waterdrop unit.