NU Aqua Efficiency Series Tankless 600GPD Reverse Osmosis System 2:1 Pure To Waste - WS

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Sale price$442.95 Regular price$589.95


120 Day Satisfaction Guarantee

Purchase with confidence! All Nu Aqua Reverse Osmosis Systems come with a 120 Day Satisfaction Guarantee. If you're not satisfied with your system in 120 Days send it back for a full refund. Click here to learn more.


With the compact Nu Aqua 600GPD Tankless Reverse Osmosis System, you get four stages of premium water purification at 25% of the size and hundreds of times faster than other RO filters. Let's face it, most RO systems take up lots of space under your sink, and those that don't take up lots of space usually don't filter more than large particles. With this tankless RO system you get all the delicious, safe water you want at a fraction of the time and space you'll spend with others.


4 Stages of Water Purification

The compact reverse osmosis offers four stages of water purification to remove up to 99% of contaminants from your water:

  1. The PP/CB Filter lasts around 6 months and offers you two stages of filtration that removes suspended particles like sediment and rust, as wells as chlorine, volatile organic contaminants (VOC's), taste and odor.

  2. The Granular Activated Carbon (GAC) filter lasts around 12 months and helps absorb organic chemicals, odors, and improves taste.

  3. The 600GPD RO membrane lasts around 36 months and helps get rid of heavy metals like copper, chromium, lead, fluoride, nitrate, and salts.

Unmatched Efficiency

This compact, tankless system gives you a water filtration rate of 600 Gallons of water per day with a 2:1 pure to waste ratio. That means you get more clean water and less waste water than with most 5 stage RO systems out there. Not to mention they do this in about 1/2 the space other RO systems take up.

The tankless design also means you get water a lot faster than with systems. Instead of waiting for a reservoir to fill up and then drawing water from that tank, this system gives you a direct line to refreshing water. That means you're getting 400% more efficiency than other RO systems!

Easy to Use, Simple to Maintain

Each long-lasting filter is simple to install and replace. Unlike other systems that require tools and climbing under your sink to swap filters, all you do is lift the front cover, twist to lock your new filter in place, then twist the filter in the opposite direction to remove and replace it.

No more waiting until your water smells bad or tastes funny to change out your filters. The Smart Faucet changes colors to let you know when your filters are ready to be changed. Once they're changed, the auto-flushing feature allows you to efficiently flush your system without all the waiting around you'll do with other reverse osmosis filters.


  • 600GPD flow rate + 2:1 pure to waste ratio = 400% more efficient than standard ro system!
  • Its compact design can fit in 25-50% of the space standard RO systems take up.
  • The Smart Faucet has a light indicator that shows you when it's time to change your filter.
  • Tool-free twist-lock filters make installation and maintenance a breeze.
  • This tankless, direct flow system delivers water faster than systems that use bulky reservoirs.
  • An integrated booster pump increases efficiency and allows systems to work with low water pressure.

    Package Includes:

    1. Nu Aqua 4 Stage 600GPD Tankless Reverse Osmosis System
    2. Installation Manual (Click Here)
    3. Stage 1 Polypropylene / Carbon Block Filter
    4. Stage 2 Granular Activated Carbon Filter
    5. Stage 3 600GPD Reverse Osmosis Membrane
    6. Smart Faucet
    7. Power Supply
    8. Feed Water Adapter
    9. Drains Saddle
    10. ¼” Quick Connect
    11. Retainer Clips
    12. ¼” Tubing
    13. ⅜” Tubing

    Customer Reviews

    Based on 111 reviews
    Bruce McPherson
    New tankless system

    Replaced 10 year old tanked RO system and love the new technology of the tankless system. Easier to install this than taking the old one out.


    Everything came in a BIG BOX. Well packaged. Itemized. Instruction booklet clearly specifies installation. The only difficult part in getting your body under the sink! Everything else is quite simple. Although it might take more than an hour to accomplish the tasks, the success is secure. It works perfectly and as advertised. I had replaced my previous EcoWaterSystem with the tank that was no longer working properly (4yrs). Hopefully this NUAQUA will bit the odds.

    Samuel Benford
    Soft well water

    I purchased this unit almost a year ago. I’m so happy with it and highly recommend it.

    I would spend 60 bucks for a 100 gallons of RO. That does not include the wear and tear on my car ,gas,45 min drive one way. It took minimum mechanical skills to get up and running . Save time and money and pick one up the water taste great!

    Mark Hand
    Unique installation

    As you can see from the pic, this system was not installed under the sink. I installed it the basement below the kitchen. Why? I have two different methods of supplying the unit, option 1 is from my well, which runs thru a water softening system, option 2 is from a spring. Either option is selectable by valves. I also have two outputs to feed, one to the sink and one to an ice maker. As this was the location on my old (+30 yrs) RO unit, this location was perfect.
    Everything works great as far as the unit goes. The booster pump ensures a steady supply to me outputs. Only reason for not giving it 5 stars, is that, when I called service, to get the part numbers of the needed mating connectors for the fabrication of a control cable extension for the sink faucet, the service was almost non existent. Nobody could help me and all they could say was not to install the unit the way I did. And almost threaten this install would void any warranty. But when asked if they wanted me to send the unit back, they just reiterated, not to install the unit in the basement. Even though customer serves rating was basically 0, I am researching the proper IP69 connectors needed and will install the supplied facet at the sink once I fabricate the cable extension.
    Only redemption for this review would be for NU Aqua to provide me the correct connector information. Then and only then would I change this rating to 5 stars.

    Eriel Perez

    The nuaqua filter system looks good. Good design and great quality. But the problem for me is that the ph of my water doesn't change