Looking Beyond the COSTWAY Countertop Reverse Osmosis Water? 6 Alternatives Worth a Look

How each alternative compares

Waterdrop C2S Countertop RO System

The Waterdrop C2S Countertop RO System is slightly more compact than the COSTWAY model, measuring 6.1 inches wide versus 7.5 inches. It targets users seeking certified lead-free purity and smart alerts for filter changes. While it provides similar reverse osmosis filtration, it lacks the UV light stage found in the COSTWAY unit. You get a streamlined countertop footprint without the extra sterilization step. This system suits those who prioritize verified safety certifications over the additional UV protection. It is a solid choice for renters who want a reliable, compact RO solution without the bulk of larger units.

Purewell 3-Stage Gravity Countertop Filter

The Purewell 3-Stage Gravity Countertop Filter operates without electricity, unlike the electric COSTWAY RO system. It uses a gravity-fed design with a 3-stage filtration process focused on chlorine reduction. You do not get reverse osmosis membranes or TDS reduction with this unit. It is larger, standing 20 inches tall, and weighs significantly more. This filter is ideal for outdoor use or areas with unreliable power. You trade advanced contaminant removal for simplicity and portability. It is best for users who need basic water cleaning without the complexity of electrical components or filter replacement schedules associated with RO systems.

Purewell 2.25G Gravity Countertop Filter

The Purewell 2.25G Gravity Countertop Filter is another power-free option that differs from the COSTWAY model by using gravity instead of electric pumps. It features a 3-stage filtration process aimed at chlorine reduction. You will not find reverse osmosis technology or UV treatment here. The unit is tall, at 20 inches, and has a silver finish. It is designed for users who prioritize simple maintenance and chlorine removal over deep purification. This filter is suitable for those who want a quiet, low-maintenance solution. You sacrifice TDS reduction and advanced contaminant removal for a system that requires no power and offers straightforward operation for basic water cleaning tasks.

Avalon Countertop NSF Water Filter

The Avalon Countertop NSF Certified Water Filter is a compact, non-electric unit that stands 13.5 inches tall. It offers dual filtration with NSF certification, providing verified safety without the need for electricity. Unlike the COSTWAY model, it does not use reverse osmosis or UV light. You get a smaller footprint, measuring 5.4 inches wide, which saves counter space. This filter is best for users who prioritize certified contaminant reduction over TDS removal. It is a practical choice for those who want a simple, reliable filtration system without the complexity of electrical components or RO membranes. You trade advanced purification for a certified, space-saving design.

PIURIFY 50 oz Electric Water Filter Pitcher

The PIURIFY 50 oz Electric Water Filter Pitcher is a portable, fast filtration option that differs significantly from the COSTWAY RO system. It is much smaller, measuring 5.1 inches wide and 11 inches tall, and weighs only 3.2 pounds. It uses electric filtration for rapid cleaning but does not offer reverse osmosis or UV treatment. You get a lightweight, portable design suitable for travel or small spaces. This pitcher is ideal for users who prioritize speed and portability over high-volume output. You sacrifice advanced contaminant removal and TDS reduction for a compact, easy-to-use solution. It is best for those who need quick, certified filtration on the go without the bulk of a countertop RO system.

Aquasana Countertop Water Filter AQ-CWM2-B

The Aquasana Countertop Water Filter AQ-CWM2-B offers robust contaminant reduction without TDS removal, unlike the COSTWAY RO system which reduces TDS. It is designed for easy, tool-free installation and focuses on mineral retention. The unit is 7.96 inches wide and 11.6 inches tall, making it slightly narrower but shorter than the COSTWAY model. You do not get reverse osmosis membranes or UV light with this filter. It is best for users who want to retain beneficial minerals while removing lead and PFAS. This system is suitable for those who prioritize simple maintenance and mineral retention over the deep purification provided by RO technology. You trade TDS reduction for a simpler filtration process.

Quick picks

Our 7 picks

1 Best overall

COSTWAY Countertop RO Filter

Best for: portable reverse osmosis purification

Filtration Stages

5

Design

Countertop

Pure to Drain Ratio

4:1

Filtration Type

Reverse osmosis, UV

Installation Type

Countertop

Features

UV light treatment

View on Amazon: COSTWAY Countertop RO Filter Affiliate link

This COSTWAY countertop reverse osmosis system uses a 5-stage filtration process with a 0.0001 μm RO membrane and UV light treatment. It reduces over 1000 contaminants and achieves a 4:1 pure-to-drain ratio. The unit features a touch screen with volume options and a real-time filter life monitor. Its compact design fits on counters in kitchens, offices, or RVs. You get clean water without permanent installation.

Pros

• 5-stage filtration including 0.0001 μm RO membrane and UV light
• 4:1 pure-to-drain ratio for efficient water use
• Touch screen with 80/180/300/500 ml volume options
• Tool-free filter replacement with twist, lift, and lock design

Cons

• No app or remote control for monitoring
• Countertop footprint requires 7.5 x 17.5 inches of space
• UV light requires power connection to function

Good fit if

• You want RO filtration without plumbing work
• You need a portable system for an RV or office
• You prefer manual touch screen controls over app connectivity

Skip if

• You require automatic refill capabilities
• You have limited counter space under 7.5 inches wide
• You need a gravity-fed system with no electricity

Verdict: COSTWAY Countertop RO Filter delivers full reverse osmosis purity in a portable package. It suits renters or travelers who need clean water without installation. The UV stage adds an extra layer of safety for your drinking water.

2 Best premium

Waterdrop C2S Countertop RO System

Best for: countertop users seeking certified lead-free purity

Filtration Stages

6

Design

Countertop

Pure to Drain Ratio

3:1

Certification

NSF/ANSI 372

Filtration Type

Reverse osmosis

Contaminants Removed

PFAS, TDS, chlorine, lead, VOCs

View on Amazon: Waterdrop C2S Countertop RO System Affiliate link

The Waterdrop C2S is a countertop reverse osmosis system with a 0.0001 μm membrane and six filtration stages. It includes a 40 oz glass pitcher and smart alerts for filter changes. IAPMO R&T certification confirms lead-free materials. This unit suits users seeking certified purity in a compact, installation-free design for kitchen or office use.

Pros

• Six-stage reverse osmosis filtration with 0.0001 μm membrane
• IAPMO R&T certified to NSF/ANSI 372 for lead-free materials
• 528-gallon total filtration capacity reduces maintenance frequency
• Smart display and voice alerts for easy setup and filter changes

Cons

• 12.1-pound weight makes it less portable than lighter pitchers
• No app control or remote monitoring features listed
• Limited to countertop placement without under-sink installation

Good fit if

• You want certified lead-free materials for safe hydration
• You prefer a countertop unit that requires no plumbing
• You need smart alerts to track filter life

Skip if

• You need under-sink installation to save counter space
• You want app connectivity for remote monitoring
• You require a portable pitcher under 10 pounds

Verdict: Waterdrop C2S Countertop RO System delivers certified purity and smart alerts for users who prioritize verified safety and convenience in a countertop format.

3 Best budget

Purewell 3-Stage Gravity Countertop Filter

Best for: Basic gravity filtration without electricity

Filtration Stages

3

Design

Countertop

Certification

NSF/ANSI 42

Filtration Type

Ultra-filtration

Installation Type

Countertop

Micron Rating

0.01

View on Amazon: Purewell 3-Stage Gravity Countertop Filter Affiliate link

This Purewell system uses gravity rather than electricity to filter water. It features a 0.01-micron ultra-filtration membrane and three filtration stages. The housing is 304 stainless steel. It reduces chlorine and sediment. You get clean water without plugging it in. The filter lasts up to 3000 gallons. It sits on your counter and holds 4 gallons per hour.

Pros

• 0.01-micron ultra-filtration membrane for high accuracy
• No electricity needed; uses gravity filtration
• 304 stainless steel housing for durability
• NSF/ANSI 42 certified for chlorine reduction

Cons

• Does not lower TDS values
• No electric pump for faster flow
• Manual filling required for upper chamber

Good fit if

• You want to avoid electrical outlets for water filtration
• You prefer a sturdy stainless steel build
• You need basic contaminant reduction without TDS removal

Skip if

• You require reverse osmosis for TDS removal
• You need an automatic refill system
• You want a compact pitcher-style design

Verdict: Purewell 3-Stage Gravity Countertop Filter suits renters or outdoor users who need reliable filtration without power. It delivers steady flow and durable construction for basic water cleaning tasks.

4 Also great

Purewell 2.25G Gravity Countertop Filter

Best for: power-free chlorine removal

Filtration Stages

3

Design

Countertop

Certification

NSF/ANSI 372

Filtration Type

Gravity, ceramic, activated carbon

Contaminants Removed

Chlorine

Installation Type

Countertop

View on Amazon: Purewell 2.25G Gravity Countertop Filter Affiliate link

This Purewell unit uses a 3-stage gravity filtration system with ceramic, activated carbon, and silver ion layers. It removes chlorine and large particulates without needing electricity. The stainless steel body includes a water level window for easy monitoring. It handles up to 10,000 gallons total, with filters lasting around 5,000 gallons each. It is a solid choice for those wanting a simple, lead-free countertop solution.

Pros

• 3-stage filtration removes chlorine and particulates
• No electricity required for gravity operation
• Water level window for easy monitoring
• NSF/ANSI 372 certified for lead-free materials
• Washable ceramic filter extends lifespan

Cons

• Does not reduce TDS levels
• No reverse osmosis membrane
• Requires manual flushing before use

Good fit if

• You want a filter that needs no power
• You prefer a visible water level indicator
• You need chlorine and particulate removal

Skip if

• You require TDS reduction for RO-style water
• You want an electric or faucet-connected unit
• You need fluoride removal in this specific model

Verdict: Purewell 2.25G Gravity Countertop Filter is a practical, power-free option for users who prioritize chlorine removal and simple maintenance over TDS reduction.

5 Best nsf certified

Avalon Countertop NSF Water Filter

Best for: NSF certified countertop filtration

Design

Countertop

Filtration Type

Sediment, carbon block

Installation Type

Countertop

Certification

NSF Certified

Color

Black

Dimensions

14 × 5.4 × 13.5 inches

View on Amazon: Avalon Countertop NSF Water Filter Affiliate link

The Avalon A30 is a countertop water filter system that uses sediment and carbon block dual filtration. It features a slim footprint measuring 5.4 by 14 inches and operates without electricity. The unit dispenses room-temperature water on demand and includes a battery-powered filter life indicator. This NSF certified system suits users who want a compact, non-electric solution for filtered water.

Pros

• NSF certified for safety and performance
• Dual filtration with sediment and carbon block
• Non-electric design requires no plug
• Slim 5.4-inch width saves counter space
• Battery-powered filter life indicator

Cons

• Dispenses only room-temperature water
• No hot or cold water options
• Requires connection to water source

Good fit if

• You want NSF certified filtration
• You prefer a non-electric system
• You need a slim countertop footprint

Skip if

• You require hot or cold water
• You want a portable pitcher style
• You need electric pump operation

Verdict: Avalon Countertop NSF Certified Water Filter offers reliable dual filtration in a compact, non-electric design. It fits users who prioritize certified safety and counter space over temperature variety.

6 Also great

PIURIFY 50 oz Electric Water Filter Pitcher

Best for: portable, fast electric filtration

Design

Countertop

Certification

NSF/ANSI 372

Filtration Type

Ultrafiltration, carbon

Contaminants Removed

Lead, microplastics, PFAS, E coli

Installation Type

Countertop

Features

Filter change indicator light

View on Amazon: PIURIFY 50 oz Electric Water Filter Pitcher Affiliate link

This PIURIFY pitcher uses electric ultrafiltration and carbon filtration to clean water in two minutes. It holds 50 ounces and removes over 99% of contaminants like lead and PFAS. The unit is portable and fits on countertops. You get NSF 372 certification for low lead. It includes one filter lasting 130 gallons. This system suits those wanting fast, portable filtration without complex installation.

Pros

• Electric ultrafiltration filters water in 2 minutes
• NSF / ANSI 372 certified for low lead
• Removes over 99% of lead, PFAS, and bacteria
• Filter lasts 130 gallons or 6 months
• Portable design with 30-day battery life

Cons

• Small 50-ounce capacity requires frequent refilling
• Uses ultrafiltration, not reverse osmosis
• Limited to 130 gallons per filter cycle

Good fit if

• You need fast filtration without waiting for gravity
• You want a portable pitcher for travel or office use
• You prefer NSF certified contaminant reduction

Skip if

• You require high-volume reverse osmosis output
• You need a large capacity pitcher for a family
• You want a permanently installed system

Verdict: PIURIFY 50 oz Electric Water Filter offers rapid, certified filtration in a portable package. It fits you if you prioritize speed and portability over high-volume output.

7 Also great

Aquasana Countertop Water Filter AQ-CWM2-B

Best for: removing lead and PFAS easily

Design

Countertop

Contaminants Removed

Lead, PFAS, microplastics, mercury

Installation Type

Countertop

Dimensions

9.69 × 7.96 × 11.6 inches

Weight

6.2 pounds

View on Amazon: Aquasana Countertop Water Filter AQ-CWM2-B Affiliate link

The Aquasana AQ-CWM2-B is a countertop filter using Claryum technology to reduce 78 contaminants, including lead and PFAS. It delivers an 8-ounce glass in 8 seconds and retains healthy minerals like calcium. Measuring 9.69 by 7.96 by 11.6 inches, it weighs 6.2 pounds. You should choose this if you want easy setup and a filter that lasts up to 300 gallons or 6 months.

Pros

• Claryum Technology reduces up to 99% of 78 contaminants
• Produces an 8-ounce glass of filtered water in 8 seconds
• Retains beneficial minerals like calcium and magnesium
• No installation required; sits directly on the counter

Cons

• Does not reduce Total Dissolved Solids (TDS)
• Manual filling required; no automatic pump
• Filter replacement needed every 300 gallons or 6 months

Good fit if

• You want to remove lead and PFAS without installing a new system
• You prefer water with retained natural minerals
• You need a filter that fits under standard kitchen cabinets

Skip if

• You want to reduce TDS for a purer taste
• You prefer an automatic dispensing system
• You need a system for high-volume daily use

Verdict: Aquasana Countertop Water Filter offers robust contaminant reduction without TDS removal. It fits buyers who prioritize mineral retention and simple, tool-free installation.

Specifications side by side

Frequently asked questions

See also

• kannbeki countertop dishwasher alternatives
• costway electric range alternatives