Stokk E1 Reverse Osmosis Water Filter Countertop, 5 Stage RO Water Filter System with Remineralization Glass Pitcher, NSF/ANSI 58&372, Portable No Installation Water Purifier for Home Office

Clean, fresh tasting RO water from this Stokk E 1 series, portable counter top unit!It's great for my apartment!The design is sleek and the Blue Grey color of the unit blends in with my other counter top devices.It fits nicely next to my slender olive green, Keurig coffee maker.Like a neat, sleek little coffee and RO water dispensing station for my home use.The unit fits perfectly on my counter top right next to the sink and electrical outlet.Though I am glad that the cord on this RO machine is generous, imo, tho I don't need it at this time.It's easier for me to fill up right next to the kitchen sink. I just pull it forward, slide it to the side to remove the reservoir and fill it at the tap right next to it. Snap the resevoir back in place and make a fresh carafe of RO water.It works fairly quickly while I make a cup of coffee or do other kitchen things. I tend to make the RO water in the morning, then again at night, so I have enough when needed.Of course, I use it for drinking water, refilling a medium sized water bottle, making coffee, and cooking. Typical day is filling it up twice. Sometimes 3x depending on what I am doing.I purchased this Stokk E 1 series unit on an early Thanksgiving / Prime sale.I really like that the mineral replacement was also on a Amazon special when I got it. I ordered an extra carafe that comes in handy to keep in the fridge for ice cold water to make coffee with.The municipal city water system is very hard water with who knows how many toxic chemicals in it, fluoride, chlorine etc.. I have a couple of health issues this Stokk counter top unit really helps me stay on top of with.I just noticed today that it alerts you when it's done processing whichever amount water you choose from on the front panel to fill your carafe.Oh, the panel does light up initially, then it automatically subsides after use.The filters are located behind the resevoir. I replaced 2 of the three filters today for the first time. (Originally ordered first week of October 2024.)I had some questions so I called Stokk customer service.Customer service is in Pacific Time Zone with convenient hours 8A-8P PST.I left a voice mail and Lizzie called me back.Lizzie was really nice, friendly, kind, and very helpful with my filter questions, and, she assisted me on the correct way to replace the filters.They can txt you too, while on the phone with them. Also, you can take a photo or send them a video clip if needed; which is extra great!Lizzie is going to call me back tomorrow with an answer to one of my more obscure questions.It was quite a pleasant csr experience because Lizzie was so nice!The RO filter only has to be replaced once a year.If you have hard or bad water, it will need to be replaced more, accordingly.I took advantage of a qr code special when I first ordered the unit and received an extra C filter at that time.The PPC filter arrived a couple of weeks ago and I changed out both of those today. I will purchase a new RO filter near the end of April because the water here is a little bit hard and smells funny.I figure every 6 months for RO filter replacement at this particular location.The cost of Filter replacement is cheaper than buying, and lugging jugs of water here.Especially since the cost of bottled water has increased threefold, at least, in this area.The cost of the filters is a bit less than buying, lugging and disposing jugs or large packs of bottled water for me at this location and area.Or, also less than the cost of a service with a tower and weekly delivery, too.If you are thinking about purchasing this, or one of their newer counter top units, I wouldn't hesitate to order this machine again from Stokk!

I have well water and very hard water. I have two whole house filters, one to catch sand and such and another that is a charcoal filter then through a rust reducer water softener. All together it has reduced the hard water to about half of what it had been down to around 250 hardness.This has a display that shows input and output total dissolved solids (water hardness) but does that display actually TDH? I decided to see if it does. One of the things that had me wondering was the output had always showed 25, never changed. Real or faked? The input does change but has always showed about 250 or higher and increases as it dispenses water.First how this water filter works. Basically a reverse osmosis filter is a filter that the pore size is the size of a water molecule... anything bigger will not pass through but anything the size of a water molecule or smaller will pass through the filter. Using high pressure the water is pumped through the filter forcing water molecules through the filter. Any water that hasn't gone through the filter to be dispensed is "waste" water. This water is pumped back into the tank and as "pure" water is removed the concentration of "bad" water in the tank increases. So yes the input side hardness number should increase. This "bad" water is pumped through the filter several times which does decrease the total amount of water that will be waste water. It also increases the total dissolved solids in the tank water which the input number shows as increasing. It's also why the tank needs to be dumped and filled instead of just adding water to it without removing the tank.But that output side hardness number always showing as 25 still had me wondering.I have a water distiller so decided to use distilled water to fill the tank instead of filtered tap water, after two or three tanks of using distilled water the output hardness number started going down and then stayed as 8. It would take more then using a single tank of distilled water to show a change since there is an internal tank that would need have the "old" water flushed out of it.Not having scientific instruments to actually test the water the best I can do is make some observations. Distilled water uses heat to create steam that is cooled back into liquid water, anything that evaporates at or below the temperature that water evaporates at would also be distilled. Alcohol for example. So depending on what was in the tap water distilled water may not be only H20.Stokk E1 also has more then just the reverse osmosis filter. First there is a PPC Filter that "Removes Odor, Reduces Chlorine, Reduces VOCs, Reduces Sediment", then the reverse osmosis filter followed by a C Filter... Post reverse osmosis filter coconut shell Carbon Filter. This carbon filter "Improves taste by adsorbing off-flavors and odors in the water". To me this indicates it's for absorbing anything same size or smaller then a water molecule. OK so the output water hardness will never be zero.Back to the question of does the display actually indicates input and output total dissolved solids. From what I have tried I would say it does.I don't know how accurate it is but I would say the output TDS has to be pretty darn close with all the filtering my tap water goes through and then distilled and then put through the reverse osmosis then through a final carbon filter. If it shows tap water that starts out as 250 TDS outputs as 25 TDS and the distilled water shows output as 8 TDS it is measuring TDS and not just showing a fake display. I don't expect the display to be lab quality accuracy but it does show that the machine is actually doing something.Personally I consider a reverse osmosis filter as the best water filter and have for a long time wanted one but always thought dumping as much or more water as waste water then it produced as very wasteful. It's why I went with a counter top water distiller. This reverse osmosis filter recycles the water several times reducing the amount of water lost as waste water.When compared to my counter top water distiller the distilled water may be better with lower TDS... maybe... but it takes about 6 hours to produce a single gallon of water. RO water is also a good quality water and is much quicker to make. Anything larger then a water molecule should be filtered out with RO so water hardness should be on par as with distilled water. I'll likely put my water distiller into retirement and even use the water from the RO for my coffee makers.I would buy this again.

5.0 out of 5 stars - A Great Investment for Clean Drinking Water! —I'm thoroughly impressed with the Stokk E1 RO portable countertop water filtration system!The packaging was excellent, and the included personal card with a signature from the inspection technician added a nice touch. The setup was relatively easy, although the instructions could be more comprehensive. The Thank you card with QR code for free replacement filter registration was seamless, and I'm looking forward to receiving my new filter in 30-45 days.The real standout feature is the exceptional customer support. I called the US 1-800 number and spoke with April, who was professional, knowledgeable, and helpful. She answered all my questions and provided valuable tips on maintenance and usage.The system itself works great, producing about two full carafes of water before (the display panel) prompting to dispose of the tank water. The filtered water tastes good, with the chlorine smell from tap water eliminated. I did notice a slightly plasticky taste, but overall, I'm happy with the performance.One thing to note is that the water comes out at room temperature. I prefer that, but I also transfer the some of the water to a sealed container and refrigerate it. The tank is also easy to remove and replace, contrary to some other reviewers' experiences.Overall, I'm "stoked" about my Stokk E1 RO system (pun intended!). If you're looking for a reliable and efficient countertop water filtration system, I highly recommend this product. It's a great investment for clean drinking water, and the customer support is top-notch.