COSTWAY 800 GPD Tankless RO Review (2026): A Spec-Based Look
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This costway 800 gpd tankless ro review examines a compact under-sink system designed for modern kitchens. The unit combines an 800 GPD membrane with an alkaline filtration stage to improve taste and mineral content. Its tankless design saves significant cabinet space, reducing water stagnation. The system features an 8-stage filtration process with a 2:1 pure-to-drain ratio. A smart LED faucet displays real-time TDS levels and filter status. This setup targets users who need high flow rates without the bulk of a storage tank.
What stands out
- 800 GPD membrane capacity for rapid filling
- 8-stage filtration with alkaline media for taste
- Smart LED faucet shows real-time TDS
- Tankless design saves 70% of under-sink space
- 2:1 pure to drain water efficiency ratio
Who it fits
Good fit for
You should choose this system if you have limited under-sink cabinet space but require high daily water volume. The tankless configuration is ideal for small kitchens where a traditional tank would not fit. The 800 GPD output ensures quick cup fills, while the alkaline stage enhances flavor. The included wrench and twist-and-pull filter design make maintenance straightforward for DIY installers who prefer not to hire a professional.
Who should skip it
You should look elsewhere if you need a system that does not require a dedicated faucet. This unit includes a smart LED faucet that displays TDS levels, which may not match your existing kitchen aesthetic. Additionally, if you prefer a simpler filtration setup without mineral addition, the alkaline stage might be unnecessary. The compact dimensions may also restrict compatibility with certain deep or oddly shaped cabinets, so verify your space first.
Verdict: This system offers high flow and smart monitoring in a space-saving form factor. It is a practical choice for small kitchens needing rapid water access.
COSTWAY 800 GPD Key Specs
Capacity: 800 GPD
This rating indicates the membrane can produce up to 800 gallons of purified water daily under standard test conditions. In practice, this high flow rate allows you to fill a large pitcher or cook a pot of pasta without waiting for a storage tank to refill. It suits households with high daily water usage or multiple people who frequently need filtered water for drinking and cooking.
Filtration Stages: 8
The system uses eight distinct layers of filtration, including pre-filters, the RO membrane, and post-filters. This comprehensive setup ensures thorough removal of contaminants before the water reaches your tap. Each stage targets different impurities, from sediment to dissolved solids. You benefit from a multi-barrier approach that provides consistent water quality compared to systems with fewer filtration steps.
Micron Rating: 0.0001µm
This value describes the pore size of the reverse osmosis membrane. A rating of 0.0001 microns is extremely fine, allowing only water molecules to pass through while blocking larger contaminants like lead, fluoride, and PFOA. This precision ensures that harmful substances are effectively removed. You get highly purified water suitable for infants or those sensitive to specific impurities found in municipal supplies.
Pure to Drain Ratio: 2:1
For every two gallons of clean water produced, one gallon is sent to the drain. This ratio reflects the system's efficiency in water usage. A 2:1 ratio is considered moderate for tankless systems, meaning it wastes less water than older 1:1 models but more than high-efficiency 1:1 or better designs. You should consider this when evaluating long-term water consumption costs.
Design and build overview
The listing describes this unit as a tankless under-sink system. Its compact dimensions are 5.5 inches wide, 15.5 inches high, and 14.5 inches long. This small footprint is designed to save 70% of cabinet space compared to traditional tank-based models. You will find it fits well in kitchens with limited storage. The tankless configuration also helps minimize water stagnation, which supports fresher water quality.
According to the listing, the system includes a smart LED faucet. This faucet features a full-rotation spout and displays real-time TDS levels. It also shows filter status, turning red when replacement is needed. The unit itself contains eight filtration stages. These include PP fiberfill, activated carbon, a scale inhibitor membrane, and an alkaline media stage. The alkaline stage is intended to enhance mineral content and improve taste.
The design prioritizes easy maintenance. The filters use a twist-and-pull mechanism for replacement. An included wrench simplifies this process. The system also features an automatic flushing function. This helps maintain filter efficiency over time. The 2:1 pure to drain ratio is noted as a way to optimize water use. These specs suggest a focus on convenience and space saving for everyday kitchen use.
Setup and everyday use
Installation requires mounting the unit under your sink. The compact dimensions of 5.5 inches wide, 15.5 inches high, and 14.5 inches long allow it to fit in tight spaces. This tankless design saves 70% of cabinet space compared to traditional models. You do not need to manage a storage tank, which reduces water stagnation and supports freshness.
Daily use begins with the smart LED faucet. It features a full-rotation spout and displays real-time TDS levels. This display also shows filter status. When the indicator light turns red, you know it is time to replace a filter. The system includes an automatic flushing function to help maintain filter efficiency during operation.
Maintenance is straightforward. The unit includes a wrench to simplify the process. Filters are replaced via a twist-and-pull design. The RO filter lasts for 24 months, while the PCT filter lasts for 12 months. Replacement filters are available through the brand story section.
The system uses an 8-stage filtration process. This includes PP fiberfill, activated carbon, and a scale inhibitor membrane. The 0.0001µm RO membrane reduces lead, PFOA, fluoride, and TDS. An alkaline media stage enhances mineral content and taste. The flow rate is 800 GPD, which fills cups quickly. The pure to drain ratio is 2:1, optimizing water use. You can choose between 800 GPD and 600 GPD models depending on your needs.
Before You Buy This System
You need to verify your under-sink space before ordering. The unit measures 5.5 inches wide, 15.5 inches high, and 14.5 inches long. Ensure your cabinet has enough clearance for the tankless design. You must also check your water pressure. High flow rates like 800 GPD often require adequate supply pressure to perform as listed. The system includes a smart LED faucet with real-time TDS display. Confirm this faucet fits your sink hole size. Upkeep involves replacing the RO filter every 24 months and the PCT filter every 12 months. The twist-and-pull design simplifies this task. You should also ensure you have a wrench for maintenance. This model competes with other tankless options by offering alkaline filtration. It suits those prioritizing space savings and mineral enhancement over basic purification. Verify your drain line can handle the 2:1 pure to drain ratio. This ratio is efficient but requires proper plumbing connection. Always check the brand story section for compatible replacement filters to ensure long-term usability.
Check before you buy
- Measure cabinet space against 5.5 x 15.5 x 14.5 inch dimensions.
- Confirm sink hole size fits the included smart LED faucet.
- Check water pressure supports 800 GPD membrane performance.
- Verify drain line accommodates the 2:1 pure to drain ratio.
The product at a glance
COSTWAY 800 GPD Tankless RO System
Best for: tight under-sink spaces with LED display needs
- Filtration Stages
- 8
- Capacity (GPD)
- 800 GPD
- Design
- Under sink, tankless
- Pure to Drain Ratio
- 2:1
- Filtration Type
- Reverse osmosis, alkaline
- Contaminants Removed
- Lead, PFOA, fluoride, TDS
View on Amazon: COSTWAY 800 GPD Tankless RO System Affiliate link
This tankless under-sink RO system delivers 800 GPD capacity with an 8-stage alkaline filtration process. It uses a 0.0001µm membrane to reduce lead, PFOA, fluoride, and TDS. The compact design saves 70% of cabinet space compared to tank models. A smart LED faucet shows real-time TDS levels and filter status. It features a 2:1 pure to drain ratio and automatic flushing to maintain efficiency.
Pros
- 800 GPD tankless capacity for quick fill times
- 8-stage alkaline filtration enhances mineral content
- Smart LED faucet displays real-time TDS levels
- Compact dimensions save 70% under-sink space
- 2:1 pure to drain water efficiency ratio
Cons
- Requires under-sink installation space
- No mention of mobile app connectivity
- Alkaline media may alter standard RO taste profile
Good fit if
- You have limited under-sink cabinet space
- You want real-time water quality monitoring via LED display
- You prefer alkaline-enhanced water for better taste
Skip if
- You need a countertop or portable unit
- You require smart home app integration
- You are on a tight budget and need the lowest upfront cost
Verdict: COSTWAY 800 GPD Tankless RO System fits kitchens with tight cabinets who value real-time TDS monitoring and alkaline water. It suits buyers prioritizing space savings and modern faucet displays over traditional tank storage.
Specifications side by side
| Spec | COSTWAY 800 GPD Tankless RO System |
|---|---|
| Filtration Stages | 8 |
| Capacity (GPD) | 800 GPD |
| Design | Under sink, tankless |
| Pure to Drain Ratio | 2:1 |
| Filtration Type | Reverse osmosis, alkaline |
| Contaminants Removed | Lead, PFOA, fluoride, TDS |
| Installation Type | Under sink |
| Micron Rating | 0.0001 µm |
| Capacity | 800 GPD |
| Features | Alkaline Filter |
| Dimensions | 14.5 × 5.5 × 15.5 inches |
| Size | 800 GPD |
| Model | ES1060 |
Frequently asked questions
What is the model number for the COSTWAY 800 GPD tankless RO system?
The model number is ES1060. This identifier helps you verify the exact unit when ordering replacement filters or checking compatibility with your existing plumbing. It distinguishes this specific tankless configuration from other models in the COSTWAY lineup.
Does this system include an alkaline filter?
Yes, the system features an alkaline filter. This additional stage is designed to adjust the pH level of the purified water. It aims to improve taste and add minerals, providing a different drinking experience compared to standard reverse osmosis output.
How wide is the COSTWAY ES1060 unit?
The unit is 5.5 inches wide. This narrow profile is a key part of its tankless design, allowing it to fit into tight under-sink cabinets. You should measure your available space to ensure this width clears any pipes or valves.
Is the COSTWAY 800 GPD system tankless?
Yes, it is a tankless system. This design eliminates the need for a large storage tank, saving significant cabinet space. It produces water on demand, which reduces the potential for water stagnation and helps maintain freshness in your filtered supply.
What is the daily capacity of this reverse osmosis system?
The system has an 800 GPD capacity. This rating indicates the membrane can produce up to 800 gallons of purified water per day under standard test conditions. This high output supports households with heavy water usage for drinking and cooking.
Does the COSTWAY system have an LED display?
Yes, the system includes an LED display. This feature provides real-time TDS (Total Dissolved Solids) monitoring. It allows you to check water quality directly at the faucet, offering immediate feedback on the effectiveness of your filtration system.
How tall is the COSTWAY 800 GPD unit?
The unit stands 15.5 inches tall. This vertical dimension, combined with its 14.5-inch length, creates a compact footprint. You should verify that your under-sink area has sufficient height clearance to accommodate this specific size without interference from shelves or plumbing.