M6 Series RO System

M6 Series
RO System

RO Hot, Cold & Mineral Water – For All Your Needs

Smart

Smart Voice Guidance

Certified

NSF/ANSI 58 & 372 Certified

Minerals

Nourish your body

M6 Series with Separate Wastewater Tank

Cold, hot, mineral, pure – everything you want

  • Instant Hot Water

    M6H RO System

    Hot Water, Ready Instantly

    $329.00 $429.00
    Buy Now
    Waterdrop M6H Instant Hot Reverse Osmosis System, Countertop RO Filter
  • Alkaline Minerals

    M6SL RO System

    Pure, Mineral-Rich Water Every Day

    $299.00 $329.00
    Buy Now
    Waterdrop M6SL Mineral Reverse Osmosis System Countertop Water Filter
  • Hot and Cold water

    M6CG RO System

    Hot or Cold, Mineral Water Perfected

    $539.00
    Buy Now
    Waterdrop M6CG Remineralization Hot Cold Countertop RO System

Are You Troubled by These Problems?

Tap Water

Tap Water

Water tastes bad

Bad Taste

Bad Taste

Purified water but lacks minerals.

Installation Hassle

Installation Hassle

Too much effort before you can even use it.

  • Tap Water

    Tap Water

    Water tastes bad

  • Bad Taste

    Bad Taste

    Purified water but lacks minerals.

  • Installation Hassle

    Installation Hassle

    Too much effort before you can even use it.

What Sets the M6 Series Apart

Discover the unique features, performance upgrades, and benefits of each M6 model to find the perfect fit for your needs.

M6H: Instant Heating

WD-M6H delivers instant hot water at perfect temps: 113°F for formula, 185°F tea, 199°F coffee, 203°F oatmeal.

M6SL: Lightly Alkaline

The WD-M6SL adds beneficial minerals such as K⁺, Ca²⁺, Na⁺, and Mg²⁺, which lightly alkalize the water and help enhance the flavor, making it suitable for daily drinking and cooking.

M6CG: Mineralized, Hot & Cold

Enriched with K⁺, Ca²⁺, Na⁺, Mg²⁺, Sr²⁺, Zn²⁺, and H₄SiO₄, this system delivers natural-tasting mineral water, hot or cold, for the whole family.

M6H: Instant Heating

What All M6 Models Have in Common

All M6 models provide reliable RO filtration, user-friendly operation, safe drinking water, consistent performance, and NSF/ANSI 58 & 372 certified.

RO Filtration & LED Function

The filter features a 0.0001μm RO membrane and LED Function. It reduces microplastics, TDS, PFOA, PFOS, nitrate, fluoride, lead, and more, providing you with healthy water.

Separates Tap and Waste Water

This system has a 185oz tank (135oz tap, 50oz waste) with a 3:1 pure-to-drain ratio, keeping water fully separate for safe use.

Detachable Glass Pitcher

Our 40oz detachable glass pitcher helps prevent chemical harm. It's perfect for storing in the fridge, cooking, or pouring water for pets. The glass pitcher is from the Maxblue brand.

Smart Voice Guidance

Smart voice alerts let you know when to replace filters, refill or empty the tank, and guide first-time setup easily.

RO Filtration & LED Function
RO Filtration & LED Function
RO Filtration & LED Function

Compare  

M6 Series

Compare
M6 Series

Waterdrop M6H Instant Hot Reverse Osmosis System, Countertop RO Filter

M6H

$329.00
$429.00 $100 off
Waterdrop M6SL Mineral Reverse Osmosis System Countertop Water Filter

M6SL

$299.00
$329.00 $30 off
Waterdrop M6CG Remineralization Hot Cold Countertop RO System

M6CG

$539.00
Flow Rate
Flow Rate 75GPD 75GPD 75GPD
Alkaline Mineralization
Alkaline Mineralization ×
Pure to Drain
Pure to Drain 3:1 3:1 3:1
Filter Lifespan
Filter Lifespan
Average Annual Cost
Average Annual Cost $59.99 $69.99 $69.99
Warranty
Warranty 1 Year 1 Year 1 Year
Certification
Certification NSF/ANSI 58 & 372 Certified NSF/ANSI 58 & 372 Certified NSF/ANSI 58 & 372 Certified
Product Dimensions (In)
Product Dimensions (In) ‎15.9*9.3*14.5 ‎15.9*9.3*14.5 ‎15.9*9.3*14.5
Product Weight (Ib)
Product Weight (Ib) 22 21 26
Model
Model M6H M6SL M6CG
Filtration
Filtration 7-stage Filtration 8-stage Filtration 8-stage Filtration
Electricity Required
Electricity Required Yes Yes Yes

Discover the Highlights of Waterdrop

Waterdrop global highlights

82+

Available in 82+ Countries

300+

Granted 303 Patents

1Billion+

Replaced Single-used Plastic Bottles

Media Attention

The water filtration system has an efficient 3:1 water ratio that helps to conserve water resources. (By comparison, other tankless RO water-to-wastewater ratios are typically around 1.5:1 or 2:1.).

This system takes it a step further with UV sterilization, a built-in TDS meter on the faucet itself, and a remineralization cartridge to ensure the outflow is a perfectly alkaline 7.5 pH.

While most point-of-use RO filters service one faucet, the X12 Pro also provides filtered water to your dishwasher, your sink's cold-water supply, or an ice maker. You could even filter water for a bidet, if you're willing to do the plumbing.

Between the smart faucet, balanced pH, UV sterilization and sleek design, the Waterdrop Filter X12 feels like the future of home hydration.

The Waterdrop X12 is a high-capacity tankless under-sink system from one of the best-known makers of reverse osmosis filters. Practically speaking, the high daily capacity allows the X12 to deliver water more quickly than lower-capacity systems when you open the faucet.

FAQ

Curious about how the RO filter works? Our FAQ section covers everything from filter lifespan to installation tips for clean, pure water every day.

Contact Us

What’s the difference between the M6 models?

WD-M6H: Instant hot water at perfect temperatures (113°F–203°F) for formula, tea, coffee, and oatmeal.

WD-M6SL: Lightly alkaline water with added minerals (K⁺, Ca²⁺, Na⁺, Mg²⁺) for daily drinking and cooking.

WD-M6CG: Mineralized hot & cold water with a wider range of minerals (K⁺, Ca²⁺, Na⁺, Mg²⁺, Sr²⁺, Zn²⁺, H₄SiO₄) for whole-family use.

How does the filtration work?

All M6 models feature RO filtration with UV treatment and a 0.0001μm membrane that reduces microplastics, TDS, PFOA, PFOS, nitrate, fluoride, lead, and more, providing safe, healthy drinking water.

What is the water capacity and waste ratio?

Each system has a 185oz tank (135oz tap water, 50oz waste water) with a 3:1 pure-to-drain ratio, keeping tap and waste water separate for safe use and efficient operation.

Can I use the water for cooking and pets?

Yes. Each system comes with a 40oz detachable glass pitcher, perfect for storing in the fridge, cooking, or pouring water for pets without chemical contamination.

How do I know when to refill or replace filters?

The smart voice guidance alerts you when to replace filters, refill or empty the tank, and provides simple instructions for first-time setup, making daily operation convenient and worry-free.