Four-stage Reverse Osmosis Water Filter

Included Warranty: 1 Year
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    Four-stage Reverse Osmosis Water Filter
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    This easy-to-install, high-capacity, reverse-osmosis water filter is easy to maintain and allows for an in-home water filtering system. By reducing additives to drinking water, this four-stage system comes with everything needed for installation.


    ITEM#: 11367646

    • Clear your water with this handy Reverse Osmosis water filter
    • Complete 4-stage system is easy to install and maintain
    • High-capacity water filtration device can be installed in your current plumbing
    • 25 gallon per day RO membrane
    • Like having a bottled water plant in your own home
    • System comes equipped with everything needed to install in to your current plumbing
    • Includes long reach faucet to ensure continued high quality drinking water
    • Reduces chlorine taste and odor, sediment, arsenic, lead, perchlorate, cysts, cryptosporidium, giardia, entamoeba, TDS, turbidity and more
    • Ensures the health and safety of your drinking water
    • System is NSF Certified and comes backed by the Watts 130 years of industry experience and quality


    Material Plastic
    Assembly Assembled Assembly Required
    Dimensions 5.5 in. H x 13 in. W x 16 in. L
    Manufacturer Warranty 1 Year
    Materials Metal, plastic
    Model Number RO-TFM-4SV

    Customer Reviews

    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    • Big Mess

      I have had two professionals try to hook this up after my attempt failed. Their attempts failed as well. I have never beena ble to get it to work without leaking once it builds up pressure. The instructions are inaccurate to start with and you cant hook it up the way it says to or any other way that it actually works it seems like so it is just taking up room and a hole in my wallet!

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    • Still processing

      the installation went smoothly, the product seems solid and it fit under the sink. Overall I am pleased but the verdict is still out, hence a two star review. After set up the unit must be filled and drained 3 times before use. Upon turning on the water a hissing noise began to emit from the back up drain hole on the RO faucet. 5 hours later it is still hissing. I have drained the unit once and am filling it again. Stay tuned for more excitement and a full review...

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    • Consider physical SIZE of filtration device

      This filtration devise was just TOO LARGE to fit in the cabinet space I had under my sink!!! There was no information in the item description about the size of space needed for this to install and fit properly under cabinet. Is that a common bit of information that everyone (but me) knows? I had to send it back.On a positive note, Overstock's return process was pretty fluid and efficient. I was able to initiate the return online, print off a UPS shipping label from my computer at home, have the return shipping amount deducted from my credit and drop it off at a UPS store. That part was easy.In the end, it was an E$$PEN$IVE way to learn about water filtration devices. Would have been much easier if Overstock noted details like the amount of cubic feet required for installation!!!

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    • Great water finally

      We moved in to a new area where the water tasted horrible. We were looking in to picking up a filtration unit, and decided on an RO system. After looking at a number of units, and investigating certified systems at NSF International, I found this unit to be the best value for the price.The system was relatively easy to install right out of the box. The hardest part was installing the faucet of the reverse osmosis unit. Outside of that, it was pretty easy to do the rest. All in all it took about an hour to complete. We have had it running for a few weeks now and it has been great. We have actually been using the RO water for the pets and the plants around the house.Great buy - recomended.

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    • 4 stage RO

      This is a real good deal. I checked on replacement filters cost before buying. They are not expensive like the unit we have in our home. Got this for weekend lake cabin. Tired of expensive pitcher filters! Only problem ours came with wrong instructions but we figured it out without them. We have septic tank so put drain through wall to drain in flower bed to keep extra water out of septic tank. No more waiting for water to filter in pitcher! Love it!

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    • not a good quality

      As I have said we purchased it on Oct 2009 installed it on 12-2009 now it is malfunctioning is frustrating ...Iyesterday it gave us 1 lliter of water to drink

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    • Easy to install

      If you don't have one already, you'll need to buy a knockout punch to cut the hole in the sink. Installation only took a couple of hours. I would back these guys in a knife fight anytime.

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    • Noisy

      This system makes the water taste real good but it's really noisy! Can't recommend it.

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    Questions & Answers

    Get your product questions answered right here.
    • does it have TFC or CTA?

      • The Four-stage Reverse Osmosis Water Filter does not have TFC or CTA. Thanks for shopping with us.

    • i need a manuel

    • does this system remove flouride?

    • how do I install under the sink

    • Where can you buy filters and how much are they? Need one which will filter out arsenic.

      • has a great variety of filters and depending on your needs. The prices will vary.

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    Usually leaves our warehouse in 1-2 business days. *

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    FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

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