Best Stokk Reverse Osmosis Systems: 2 Models Compared
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Finding the best stokk reverse osmosis systems requires comparing their published specifications. We evaluated 2 models to help you choose the right fit for your kitchen. Stokk offers compact, tankless units in white, designed for under-sink installation. These systems prioritize space efficiency and high daily output.
The Stokk S2 800 GPD Tankless RO leads this list as the best overall pick. It delivers fast flow and saves space with its tankless design. Our rankings rely strictly on the specs provided in each listing. We focus on capacity, dimensions, and filtration stages to guide your decision.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Stokk S2 800 GPD Tankless RO Best overall | Fast flow and space-saving under-sink installation | Check price of Stokk S2 800 GPD Tankless RO on Amazon |
| 2 | Stokk 600 GPD Tankless RO System Best budget | Space-saving tankless filtration with digital monitoring | Check price of Stokk 600 GPD Tankless RO System on Amazon |
Our 2 picks
Stokk S2 800 GPD Tankless RO
Best for: Fast flow and space-saving under-sink installation
- 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 an 800 GPD tankless reverse osmosis system with 8-stage filtration. It removes TDS, PFOA, and PFOS using a 0.0001 μm membrane. The unit features a smart display faucet for TDS monitoring and filter life tracking. Its compact design saves under-sink space. This system suits kitchens needing fast flow and high purity without a storage tank.
Pros
- 800 GPD capacity delivers a cup of water in 5 seconds
- Smart display faucet shows real-time TDS levels
- Tankless design saves over 50% of under-sink space
- 3:1 pure to drain ratio improves water efficiency
Cons
- Requires an electrical outlet for operation
- Needs drilling holes in the sink or counter
- No storage tank means flow rate depends on membrane speed
Good fit if
- You need high daily water volume without a tank
- You want real-time water quality monitoring via the faucet
- You have limited under-sink space for bulky units
Skip if
- You do not have an electrical outlet under your sink
- You prefer a system with a storage tank for consistent pressure
- You want to avoid drilling new holes in your countertop
Verdict: Stokk 800 GPD Tankless RO System fits users who prioritize speed and space savings. It delivers high purity and instant water for busy households without the bulk of a traditional tank.
Stokk 600 GPD Tankless RO System
Best for: Space-saving tankless filtration with digital monitoring
- Filtration Stages
- 8
- Capacity (GPD)
- 600 GPD
- Design
- Under sink, tankless
- Pure to Drain Ratio
- 2.5:1
- Filtration Type
- Reverse osmosis
- Contaminants Removed
- TDS, PFOA, PFOS, fluorides, chlorides
View on Amazon: Stokk 600 GPD Tankless RO System Affiliate link
This Stokk system offers 600 gallons per day of tankless reverse osmosis filtration across eight stages. It features a smart digital faucet that displays TDS levels and tracks filter life. The unit maintains a 2.5:1 pure-to-drain ratio and measures 14.6 by 14.57 by 11.95 inches. It requires a 120-volt power outlet and under-sink drilling for installation. This model suits users seeking fast flow and space savings without a storage tank.
Pros
- 600 GPD tankless capacity for quick water flow
- Smart digital faucet with TDS monitor and filter life tracker
- 8-stage filtration removes 1000+ contaminants at 0.0001μm
- 2.5:1 pure-to-drain ratio improves water efficiency
- Space-saving design saves over 75% of under-sink space
Cons
- Requires a 120-volt power outlet for operation
- Needs under-sink drilling for faucet installation
- No storage tank means flow rate depends on membrane speed
Good fit if
- You need a compact system that fits tight under-sink spaces
- You want real-time water quality monitoring via a digital display
- You prefer tankless designs to prevent recontamination
Skip if
- You do not have access to a 120-volt power outlet under your sink
- You cannot drill holes for a dedicated faucet installation
- You prefer systems with a storage tank for buffered flow
Verdict: Stokk 600 GPD Tankless RO System delivers high-capacity filtration with a smart faucet for users who value space efficiency and real-time water quality data. It is ideal for modern kitchens with available power and drilling options.
Specifications side by side
| Spec | Stokk S2 800 GPD Tankless RO | Stokk 600 GPD Tankless RO System |
|---|---|---|
| Filtration Stages | 8 | 8 |
| Capacity (GPD) | 800 | 600 GPD |
| Design | Under sink, tankless | Under sink, tankless |
| Pure to Drain Ratio | 3:1 | 2.5:1 |
| Filtration Type | Reverse osmosis | Reverse osmosis |
| Contaminants Removed | TDS, PFOA, PFOS, fluorides | TDS, PFOA, PFOS, fluorides, chlorides |
| Installation Type | Under sink | Under sink |
| Features | Timed flush, smart display faucet | Smart LED faucet, TDS monitor |
| Micron Rating | 0.0001 | 0.0001 μm |
| Capacity | 800 GPD | 600 GPD |
| Color | White | White |
| Dimensions | 18.1 × 5.91 × 14.9 inches | 14.6 × 4.49 × 12 inches |
| Model | S2 | 4895260602561 |
Stokk RO System Overview
Stokk offers tankless reverse osmosis systems designed for under-sink installation. Both models prioritize space efficiency with compact white casings. You can choose between two production capacities to match your household's water usage needs. The units are built to fit in tight spaces without requiring a storage tank.
The Stokk S2 800 GPD model provides the highest output for busy kitchens. It measures 18.1 inches long and suits users who need fast flow. The 600 GPD variant is slightly narrower and includes eight filtration stages. It also features digital monitoring via a smart faucet. Select the 800 GPD unit for maximum speed or the 600 GPD model for detailed water quality tracking.
Who Stokk RO Systems Suit
Stokk’s current lineup targets users who need high flow rates without the bulk of a storage tank. The range spans from 600 to 800 gallons per day. Both models feature compact, white tankless designs that fit under most sinks. The 600 GPD unit includes digital monitoring for real-time water quality data. You should know that Stokk does not currently offer models with built-in storage tanks in this list. There are no colored options available, only white. If you require a tank-based system or a different color, this brand’s current selection may not fit your specific kitchen layout or aesthetic needs.
How to choose the right Stokk RO
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Check daily production capacity
You must match the gallons per day rating to your household size. The Stokk S2 offers 800 GPD for faster filling, while the 600 GPD model suits smaller needs. Higher capacity reduces wait times for pitchers or cooking. Verify the GPD number in the specifications. This figure determines how quickly you get purified water during peak usage. Choose the higher number if you have a large family or heavy water consumption habits.
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Measure under-sink space
Tankless designs save space, but dimensions vary. The Stokk S2 measures 18.1 inches long, while the 600 GPD unit is shorter at 14.6 inches. Both are narrow, fitting under most sinks. Measure your available cabinet width, height, and depth before buying. The S2 is wider at 5.91 inches compared to the 4.49-inch model. Ensure your plumbing layout accommodates the specific length of the chosen unit to avoid installation conflicts.
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Review filtration stages
More stages often mean broader contaminant removal. The 600 GPD system features an 8-stage filtration process. This setup targets various impurities for high purity. The S2 also delivers high purity, though stage count is not listed. Check the specification sheet for the exact number of filters. More stages can extend filter life or improve taste. Select the model with the stage count that meets your water quality concerns.
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Assess faucet features
The faucet interface changes user experience. The 600 GPD model includes a digital smart faucet for real-time water quality data. This feature lets you monitor purity instantly. The S2 focuses on speed and simplicity. Decide if you value digital feedback or just clean water. The digital display adds cost and complexity. Choose the smart faucet if you want visibility into your water quality. Pick the standard option for straightforward operation.
-
Confirm power availability
Tankless systems require electricity to operate. Both Stokk models need a power source under your sink. Check for an available outlet in your cabinet. The 600 GPD system explicitly mentions available power as a requirement. Ensure you have a nearby GFCI outlet. Without power, these units cannot function. Plan your installation around electrical access. If no outlet exists, you may need to hire an electrician or choose a different system type.
Frequently asked questions
Which Stokk RO system is the best overall choice?
The Stokk S2 800 GPD Tankless RO is the top pick. It offers the highest daily production capacity of 800 gallons. This model is ideal for busy households that need fast water flow. Its tankless design saves space under your sink compared to traditional systems with storage tanks.
How much space does the Stokk S2 take up?
The Stokk S2 measures 18.1 inches in length, 14.9 inches in height, and 5.91 inches in width. These compact dimensions allow it to fit in tight under-sink cabinets. The white casing helps it blend in with standard kitchen plumbing setups.
Does the Stokk 600 GPD model have smart features?
Yes, the Stokk 600 GPD Tankless RO System includes a smart faucet for digital monitoring. It provides real-time water quality data to help you track performance. This 8-stage filtration unit is designed for users who value space efficiency and instant access to clean water.
What is the difference between the 600 and 800 GPD models?
The main difference is the daily production capacity. The S2 model produces 800 gallons per day, while the other unit produces 600 gallons. The 800 GPD version is better for larger households needing faster fill times. Both models share a tankless, white design for under-sink installation.
Are Stokk RO systems tankless?
Yes, both models in this lineup are tankless reverse osmosis systems. They eliminate the need for a bulky storage tank. This design saves valuable cabinet space and ensures you always have fresh water without stale stored water. You get instant flow rates directly from the filtration unit.
What color are the Stokk RO units?
Both the Stokk S2 and the 600 GPD model feature a white color. The white casing is designed to match common kitchen aesthetics. This neutral finish helps the units blend discreetly under most standard kitchen sinks.
Is the Stokk 600 GPD system suitable for small kitchens?
Yes, it is highly suitable for small kitchens due to its compact size. It measures 14.6 inches in length, 12 inches in height, and 4.49 inches in width. This smaller footprint allows it to fit in tighter spaces while still providing 600 gallons of filtered water per day.