COSTWAY Alkaline PH+ RO Water Review: Specs, Pros and Cons

What stands out

• 8-stage filtration with alkaline filter for improved taste
• 600 GPD capacity fills a 6oz cup in 7 seconds
• Tankless design with 2:1 pure-to-drain ratio
• Smart LED faucet displays TDS levels and filter status

Who it fits

Key specs explained

600 GPD

This rating indicates the system produces 600 gallons of purified water per day. You get a steady flow for daily tasks like cooking or filling pitchers. It suits households with moderate water needs. Compare this to 400 GPD models if you need faster filling times for large pots or multiple taps.

8 stages

The system uses eight distinct filtration layers to clean the water. This multi-step process removes sediment, chemicals, and microscopic impurities before the final polish. You benefit from thorough purification. Compare this to 4-stage systems if you want higher purity levels for sensitive uses like brewing coffee or infant formula.

0.0001µm

This micron rating describes the pore size of the RO membrane. Smaller pores block more contaminants, including lead and fluoride. You get cleaner water with fewer dissolved solids. Compare this to larger membrane sizes if you prioritize flow rate over absolute purity, as smaller pores typically restrict water passage slightly.

2:1 ratio

This pure-to-drain ratio means the system produces two gallons of clean water for every one gallon sent to the drain. It is more water-efficient than older 1:1 models. You waste less water during the purification process. Compare this ratio to lower efficiency systems if you want to conserve household water usage.

Tankless

This design lacks a large storage tank, saving significant under-sink space. The footprint is 15 x 5.5 x 15.5 inches. You get fresh water on demand without storing it. Compare this to tank-based systems if you have limited cabinet space or want to avoid potential water stagnation in stored reserves.

Compact tankless design and layout

The listing describes this unit as a tankless under-sink system. Its physical footprint measures 15 inches in length, 5.5 inches in width, and 15.5 inches in height. This compact shape allows it to save approximately 70% of the space typically required by systems with storage tanks. You can install it in tighter cabinets without displacing other items. The tankless construction also helps minimize water stagnation, which supports maintaining freshness in the water supply.

Control is handled by a smart LED faucet that swivels 360 degrees. This faucet provides real-time monitoring of TDS levels and filter status. The display changes to red when filters need replacement, allowing you to track maintenance without opening the cabinet. The system also includes auto-flushing features to support longer filter life and maintain efficiency. These controls are integrated directly into the faucet rather than a separate box.

Filtration relies on an 8-stage process. The core component is a 0.0001µm RO membrane. This rating means the membrane blocks particles of that size, targeting contaminants like PFOA, lead, fluoride, and TDS. An alkaline filter is included in the stage sequence to add minerals. This addition is intended to enhance taste. The system achieves a 2:1 pure-to-drain ratio, meaning it uses two gallons of purified water for every one gallon sent to the drain. This layout prioritizes efficiency and space saving in the under-sink environment.

Setup and everyday use guide

The COSTWAY ES1063 is designed for under-sink installation. Its compact dimensions of 15 by 5.5 by 15.5 inches allow it to fit into tighter cabinet spaces. The tankless design eliminates the need for a large storage tank, which reduces water stagnation and helps maintain freshness. You install the unit directly under your sink, connecting it to your cold water line.

Daily operation relies on an 8-stage filtration process. The system uses a 0.0001µm RO membrane to remove impurities such as lead, fluoride, and PFOA. An alkaline filter then adds minerals to improve taste. The unit operates with a 2:1 pure-to-drain ratio, meaning it produces two gallons of purified water for every one gallon sent to the drain. This efficiency helps optimize water usage during normal tasks like cooking or filling glasses.

Monitoring water quality is straightforward with the included smart LED faucet. It provides 360-degree swivel access and displays real-time TDS levels. The faucet also shows filter status. When the indicator turns red, it signals that a filter replacement is needed. The system includes auto-flushing to support longer filter life. Replacement filters feature a simple twist-and-pull design, making maintenance easy. The listing notes that PCT filters last 12 months and RO filters last 24 months. You can find replacement filters through the brand story section. This setup ensures consistent water quality without complex manual checks.

Before you buy this RO system

Before you buy this system, check your under-sink space. The unit measures 15 by 5.5 by 15.5 inches. Ensure you have room for the tankless design and filter changes. Verify your water pressure supports the 600 GPD output. Low pressure can reduce flow rates significantly. You will need to replace filters every 12 to 24 months. The alkaline filter adds minerals, which may require different maintenance than standard RO units. Consider the 800 GPD variation if you need higher flow. This model fits well if you prioritize space savings and real-time TDS monitoring via the smart faucet. It suits those who want alkaline water without a storage tank. Compare it to other tankless options if you need higher capacity. Check compatibility with your existing plumbing connections. Auto-flushing helps maintain efficiency, but you must follow the replacement schedule. This system is a practical choice for moderate households seeking compact, efficient filtration with mineral enhancement.

Check before you buy

• Measure under-sink space for 15 by 5.5 by 15.5 inch unit
• Check water pressure supports 600 GPD flow rate
• Plan for 12-month PCT and 24-month RO filter replacements
• Verify faucet compatibility with smart LED TDS display

The product at a glance

1

COSTWAY 600 GPD Tankless RO System

Best for: space-constrained kitchens needing real-time TDS monitoring

Filtration Stages

8

Capacity (GPD)

600

Design

Under sink, tankless

Pure to Drain Ratio

2:1

Filtration Type

Reverse osmosis, alkaline

Contaminants Removed

PFOA, lead, fluoride, TDS

View on Amazon: COSTWAY 600 GPD Tankless RO System Affiliate link

This tankless under-sink RO system produces 600 gallons per day through an 8-stage filtration process. It includes an alkaline filter to enhance taste and remove contaminants like lead and PFOA. The compact 15 x 5.5 x 15.5 inch design saves space. A smart LED faucet displays real-time TDS levels. You get a 2:1 pure-to-drain ratio and auto-flushing features for efficiency.

Pros

• 8-stage filtration with alkaline mineral addition
• Real-time TDS monitoring via smart LED faucet
• Compact tankless design saves 70% of space
• 2:1 pure-to-drain water ratio

Cons

• 600 GPD capacity is lower than 800 GPD variants
• No mention of a built-in storage tank for peak flow
• Faucet display is limited to TDS and filter status

Good fit if

• You need a compact system under the sink
• You want to monitor water quality in real time
• You prefer alkaline-enhanced water for better taste

Skip if

• You require high-volume flow for a large household
• You need a system with a storage tank
• You want a faucet with temperature control

Verdict: COSTWAY 600 GPD Alkaline RO System fits users who prioritize space-saving design and real-time water quality monitoring. It is ideal for those seeking alkaline-enhanced water in a compact, tankless format.

Specifications side by side

Frequently asked questions

See also

• costway alkaline ph ro water alternatives
• costway alkaline ph ro water vs countertop reverse osmosis water
• express water roelite9 alkaline ro review
• costway 12 review