Stokk 800 GPD Reverse Osmosis System Review: Specs, Pros and Cons
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This stokk 800 gpd reverse osmosis system review focuses on the Stokk S2, a tankless under-sink water filter. It is defined by its 800 GPD membrane and 8-stage filtration process. The unit measures 18.1 by 5.91 by 14.9 inches, fitting under most standard sinks. It uses a 0.0001 μm RO membrane to remove contaminants like TDS, PFOA, and PFOS. The system operates with a 3:1 pure-to-drain ratio, which improves water efficiency. You get instant fresh water without waiting for a tank to refill. The design includes a smart display faucet that tracks TDS levels and filter life. This setup targets users who need high flow rates and space savings in their kitchen.
What stands out
- 800 GPD capacity delivers a cup of water in five seconds.
- 8-stage filtration removes over 1000 contaminants with 99.99% efficiency.
- 3:1 pure-to-drain ratio saves water compared to standard models.
- Smart display faucet shows real-time TDS and filter life status.
- Tankless design saves over 50% of under-sink space.
Who it fits
Good fit for
You should choose this system if you need high daily water volume for cooking or drinking. The 800 GPD membrane supports households with heavy usage without a storage tank. It suits homes with limited under-sink space, as the compact dimensions fit tight areas. The smart faucet is ideal for users who want to monitor water quality visually. You also benefit from the quick twist-and-pull filter changes, which take less than two seconds. The system requires an electrical outlet and drilled holes, so it fits modern kitchens with existing infrastructure.
Who should skip it
Skip this model if you prefer a completely plumbed-in system without an electrical connection. The Stokk S2 requires a power outlet to operate the pump and display features. It also needs drilled holes for the faucet installation, which may not suit renters or those who cannot modify their sink. If you need a larger storage tank for backup water supply, this tankless design does not provide that buffer. Additionally, the unit is white, so it may not match dark cabinetry aesthetics. Users wanting a simple mechanical faucet without digital displays will find the smart feature unnecessary.
Verdict: The Stokk S2 offers fast, efficient filtration for space-constrained kitchens. Its tankless design and smart faucet make it a practical choice for modern homes.
Key specs explained for Stokk S2
Capacity (GPD): 800
This rating indicates the membrane produces 800 gallons of pure water per day under standard test conditions. In practice, this high output supports a busy household without needing a storage tank. You get water quickly, with the listing noting a cup fills in five seconds. This is useful if you cook frequently or have a large family. Compare this to lower-capacity units that may require a tank to maintain flow rates during peak usage times.
Design: Tankless
The system operates without a large pressure tank, saving significant under-sink space. The listing states it saves over 50% of space compared to traditional models. This design also prevents recontamination, as water is not stored in a tank for long periods. You benefit from a sleeker installation and consistent water quality. When shopping, look for tankless models if counter space is limited or if you prefer immediate filtration over stored reserves.
Filtration Stages: 8
This system uses eight distinct filtration steps to process water. The final stage involves a 0.0001 μm RO membrane, which removes tiny particles and dissolved solids. The listing claims this removes over 1,000 contaminants, including TDS, PFOA, PFOS, fluorides, and chlorides. More stages generally mean more thorough purification. Compare this to basic 4-stage systems to see if the additional filtration layers justify the choice for your specific water quality concerns.
Pure to Drain Ratio: 3:1
For every three cups of pure water produced, one cup is sent to the drain. This ratio indicates the system's water efficiency. A 3:1 ratio is considered efficient for tankless RO units, helping you conserve water compared to older models with higher waste rates. The listing notes this saves up to 1,200% more water. When comparing models, prioritize lower drain ratios to reduce water usage and utility impact during daily use.
Stokk S2 Design and Build Specs
The Stokk S2 is a tankless reverse osmosis system designed for under-sink installation. According to the listing, the unit features a white finish and measures 18.1 inches in length, 5.91 inches in width, and 14.9 inches in height. This compact footprint saves over 50% of under-sink space compared to traditional tank-based models. The tankless design prevents recontamination and eliminates the need for a bulky storage tank, making it suitable for smaller kitchen cabinets. You must ensure your space meets these dimensions before installation.
The system utilizes an integration design that reduces leak risk. Filter cartridges employ a twist-and-pull mechanism, allowing for replacements in less than two seconds. This layout simplifies maintenance and saves time during filter changes. The unit requires an electrical outlet and drilled holes for the faucet, which are necessary for operation. These requirements mean you need access to power and plumbing under your sink.
A smart display faucet is included to monitor water quality. This faucet features a visual TDS monitor and a filter life tracker. The TDS display tells you the quality of your filtered water in real time. The filter life tracker alerts you when it is time for a replacement. These controls provide convenience and peace of mind without needing additional sensors or complex interfaces. The design prioritizes space efficiency and easy maintenance for daily use.
Setup And Everyday Use Guide
The Stokk S2 requires an electrical outlet and drilled holes for installation. You must measure your under-sink space before proceeding. The listed dimensions are 18.11 inches in length, 5.91 inches in width, and 14.84 inches in height. The system uses a twist-and-pull design for filter cartridges. This integration reduces leak risks and allows changes in less than two seconds.
Daily operation is handled by a smart display faucet. This faucet includes a visual TDS monitor and a filter life tracker. You can check water quality and know when to replace filters without opening the cabinet. The unit features a water cycle timed flush. This function runs automatically to prevent sediment build-up and extend filter life. It ensures water remains pure without requiring you to discard the first two glasses of water each morning.
The 800 GPD membrane provides fast flow. You receive a cup of water in five seconds. The system maintains a 3:1 pure to drain ratio. This design saves water compared to older models. The tankless structure prevents recontamination and saves over 50% of under-sink space. You do not need to wait for a tank to refill. The 8-stage filtration removes contaminants like TDS, PFOA, PFOS, fluorides, and chlorides. The process relies on 0.0001 μm RO filtration. You get instant fresh water throughout the day. The white finish fits standard kitchen aesthetics. Support is available from a US-based team for technical questions.
Before you buy this system
You need a standard electrical outlet near the sink for this unit to operate. The listing notes that drilling holes is required for the faucet installation. Measure your under-sink space carefully, as the unit is 18.1 inches long, 5.91 inches wide, and 14.9 inches high. This tankless design saves over 50% of space compared to traditional systems with storage tanks. You should check if your current faucet holes match the included faucet or if you need an adapter. Upkeep involves replacing filters, which the smart display helps track. This system fits well if you want high flow without bulky tanks. It suits busy households needing instant water. Compare it to other tankless models if space is tight. Ensure your plumbing can handle the 3:1 pure to drain ratio. This specification means the system wastes some water to maintain purity. Verify your water pressure meets the requirements for the 800 GPD membrane. Regular maintenance ensures the 8-stage filtration continues removing contaminants effectively.
Check before you buy
- Verify you have an electrical outlet under the sink.
- Measure your under-sink space against the listed dimensions.
- Check if your faucet holes match the included faucet.
- Confirm your water pressure supports the 800 GPD membrane.
The product at a glance
Stokk S2 800 GPD Tankless RO
Best for: High-flow tankless water filtration with digital monitoring
- Filtration Stages
- 8
- Capacity (GPD)
- 800
- Design
- Under sink, tankless
- Pure to Drain Ratio
- 3:1
- Filtration Type
- Reverse osmosis
- Contaminants Removed
- TDS, PFOA, PFOS, fluorides
View on Amazon: Stokk S2 800 GPD Tankless RO Affiliate link
The Stokk S2 is a tankless reverse osmosis system with an 800 GPD membrane and 8-stage filtration. It features a smart display faucet for TDS monitoring and filter life tracking. The unit measures 18.1 by 5.91 by 14.9 inches and requires an electrical outlet. It offers a 3:1 pure to drain ratio and instant water flow without a storage tank.
Pros
- 800 GPD membrane provides fast flow rates
- 8-stage filtration removes TDS, PFOA, PFOS, and fluorides
- Smart display faucet shows real-time TDS levels
- Tankless design saves under-sink space
Cons
- Requires a dedicated electrical outlet for operation
- Needs drilling holes in the sink for faucet installation
- Physical dimensions may not fit all under-sink cabinets
Good fit if
- You need high daily water volume without a storage tank
- You want real-time water quality monitoring via the faucet display
- You have an available electrical outlet under your sink
Skip if
- You cannot install a dedicated electrical outlet under your sink
- You prefer a system with a built-in storage tank
- Your under-sink space is smaller than 18.1 by 5.91 by 14.9 inches
Verdict: Stokk S2 800 GPD Tankless RO System fits homes that need rapid water flow and digital monitoring without tank storage. It suits users with available power outlets and sufficient under-sink dimensions.
Specifications side by side
| Spec | Stokk S2 800 GPD Tankless RO |
|---|---|
| Filtration Stages | 8 |
| Capacity (GPD) | 800 |
| Design | Under sink, tankless |
| Pure to Drain Ratio | 3:1 |
| Filtration Type | Reverse osmosis |
| Contaminants Removed | TDS, PFOA, PFOS, fluorides |
| Installation Type | Under sink |
| Features | Timed flush, smart display faucet |
| Micron Rating | 0.0001 |
| Capacity | 800 GPD |
| Color | White |
| Dimensions | 18.1 × 5.91 × 14.9 inches |
| Model | S2 |
Frequently asked questions
Does the Stokk 800 GPD system require a storage tank?
No, this unit is tankless. It produces water on demand using its 800 GPD membrane. This design saves under-sink space and prevents stale water storage. You get fresh filtered water directly from the faucet without waiting for a tank to refill.
What are the exact dimensions of the Stokk S2?
The Stokk S2 measures 18.1 inches in length, 5.91 inches in width, and 14.9 inches in height. These compact dimensions allow it to fit under most standard kitchen sinks. Always verify your available space before installation to ensure a proper fit.
Is an electrical outlet needed for this reverse osmosis system?
Yes, the Stokk S2 requires a standard electrical outlet. The tankless design uses a pump to drive water through the membrane, which needs power to operate. You must have an accessible outlet near the sink for proper setup and daily use.
How much water can the Stokk S2 produce per day?
The system has an 800 GPD capacity. This means the membrane can produce up to 800 gallons of purified water daily under standard test conditions. This high output supports busy households, ensuring you have ample clean water for cooking and drinking.
What color is the Stokk S2 unit?
The unit features a white finish. This neutral color helps it blend with typical under-sink environments and cabinetry. The design is functional and discreet, keeping the focus on performance rather than aesthetics while maintaining a clean look in your kitchen.
Does this system include a digital display?
The product listing highlights digital monitoring capabilities. This feature allows you to track system status or water quality metrics directly. It provides practical feedback without needing external tools, helping you maintain the system effectively and understand its current operational state.
Who is the best fit for this tankless RO system?
This system suits homes needing rapid water flow without tank storage. It is ideal for users with available power outlets and sufficient under-sink dimensions. If you prioritize high output and modern monitoring features, this tankless design meets those specific household needs.