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Availability:
Only 2 left in stock, order soon!
Arrives
Friday, Oct 23
Set name: Alkaline Water (T1-400ALK)
Features
- TESTED BY SGS: Against the NSF/ANSI 58 Standard. The SimPure ROULP-3012-400-T1 has been independently tested by SGS, this ensures its exceptional quality and performance. It effectively removes over 99.99% of 1000+ contaminants, including TDS (fluoride, nitrates/nitrites), PFAS/PFOA/PFOS, heavy metals (lead and arsenic), chloride, etc. Enjoy purified drinking water with confidence and say goodbye to the hidden dangers of tap water.
- ALKALINE REMINERALIZATION WATER: Exclusively designed to restore the natural alkalinity and mineral balance of water. The alkaline filter contains pure natural filter material without heavy metal pollution. It is enriched with essential minerals such as calcium, magnesium, and potassium, resulting in a higher pH level compared to an ionizer. Choose our alkaline mineralization filtration to ensure your drinking water is reliable
- UV POWER & TANKLESS DESIGN: Our UV water purifier system offers you extra reliable. It operates automatically based on water flow pressure and can be easily adjusted. The tankless design ensures fresh and clear water, while also saving valuable under-sink space and preventing secondary contamination UV POWER & TANKLESS DESIGN: Our UV water purifier system offers you extra reliable. It operates automatically based on water flow pressure and can be easily adjusted. The tankless design ensures fresh and clear water, while also saving valuable under-sink space and preventing secondary contamination
- 400 GPD & 1.5:1 PURE to DRAIN: The SimPure under sink tankless RO system can produce up to 400 gallons per day of clear water. With a remarkable 1.5:1 pure-to-drain ratio, it minimizes wastage by only producing 1 gallon of wastewater for every 1.5 gallons of filtered water. Experience superior efficiency and elevated lifestyle compared to traditional RO systems
- EFFORTLESS HYDRATION & COST-EFFECTIVE: The SimPure T1-400 Series water purifier comes with a complete set of quick-change twist filter cartridges that deliver 1057 gallons of purified water (equivalent to around 8000 bottled water). Embrace a sustainable way of living, cut down on plastic waste, and save cash. It's more than just purified water - it's an enhanced lifestyle, where every sip signifies the sustainability it brings
- Serving the USA Since 2006: Based in Seattle, WA, SimPure is committed to delivering world-class water filtration solutions. If youre not satisfied with your purchase, we want to hear from you! Reach out to our team of trained water specialistswere here to answer your questions and provide support for the lifetime of your product. (Please scroll down for replacement filter purchase options)
Description
T1-400UV Near 0 TDS T1-400ALK pH+ Balance T2-600T UV Water Filter T2-600A UV Water Filter 1-Year Filter Set(7 Pack) 6-M Filter Set(3 Pack) T1 ALK Water Filter
Brand: SimPure
Special Feature: Tankless
Product Dimensions: 15.6"L x 5.3"W x 15.7"H
Material: Carbon Fiber
Capacity: 400 gallons_per_day
Included Components: 1*machine, 4* filter, 1*faucet, 1*user manual, 1*sparing
Package Information: Dispenser
Installation Type: Under Sink
Purification Method: Reverse Osmosis
Power Source: T1
Other Special Features of the Product: Tankless
Container Type: Dispenser
Installation Type: Under Sink
Purification Method: Reverse Osmosis
Power Source: T1
LowerTemperature Range: 40 °F
Maximum Flow Rate: 0.4 gpm
Operating Pressure Range: 90 pascal
Upper Temperature Rating: 9 °F
Supported Water TDS Level Maximum (PPM): 500
Filter Life Cycle: 6 months
Item Dimensions L x W x H: 15.6"L x 5.3"W x 15.7"H
Capacity: 400 gallons_per_day
Item Weight: 8 kg
Brand Name: SimPure
Included Components: 1*machine, 4* filter, 1*faucet, 1*user manual, 1*sparing
Model Name: T1-400ALK
Model Number: T1-400ALK
Manufacturer: SimPure
Item Highlight: NSF 58 Standard UV Under Sink RO Filtration System | pH+ Remineralization Filtration | Built-in Booster Pump | BPA Free
Number of Items: 1
Part Number: T1-400ALK
Material Type: Carbon Fiber
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Oct 23
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Set name: Near 0 TDS Water (T1-400)
WHY is it so freakishly difficult to find an Amazon review to edit? Most of the help is either out of date or misses important steps. Whoever planned this aspect in Amazon seems to have had a serious case of dsylexia or some kind of obfuscation disease when trying to put related items together. Update: Heard back from the company. While not yet resolved, it is good enough to restore the rating to 5 stars. For reasons unknown, the unit started to work properly again when I started on the process of uninstalling it for possible return (it is still within the return window). ====== (updated back to 5 stars, but I prefer not to delete content, but let it stand) Update: Dropping to one star. The unit developed a problem. SimPure have not responded at all to requests for assistance in addressing or diagnosing the issue. Unit is unusable at present. ============= We bought the unit that provides pure clean water with no minerals added back. In my testing of it, it delivered on that. The TDS reading was at the lowest limit that my measuring unit is capable of. Installing anything in a kitchen cabinet isn't much fun. This isn't particular to this unit in that regard. It may take quite a while to get it all done, although it is not intrisically difficult. The manual suggests placing the unit within the sink structure. I placed it on a corner of our kitchen island where it is easily accessible from multiple aspects. This turned out to be a good choice for another reason. Water delivery is slow. A cup or kettle can be put on the counter surface, and doesn't need to be held while it is filling. The unit makes noise. To prevent the cabinet from acting as a sounding board, I put some padding underneath the unit and between the fixture to the wall. This results in a level of noise that is useful to let you know it is running. Without the padding, it is rather noisy. As shown, the unit doesn't have a cover for the top. I would have preferred something to have been included that protected the top. The threaded part of the faucet was only just long enough to go through the tile and wooden base. I did not install the upper trim washer, only the rubber one. It looks fine that way. To avoid cracking the tile, a tiny, vertical, pilot hole was drilled between the 4 corners of the tiles. Then a conical shaped abrasive bit was used to wear away the enamel surfaces of the 4 tiles to about 1/2" diameter. Finished off with a combination of masonary and wood bits being careful to ensure it was vertical. No cracks, unit stands straight, all looks good. It needs an electrical supply. You could hook it up to the existing dishwasher outlet with a simple adapter, but probably better with its own outlet. Water without minerals does not have the sweet taste of water with minerals. Totally pure water tastes fine to me. As we use water primarily for tea, coffee, and cooking, it would not have been an issue anyway. We can always provide bottles of water for those that prefer the mineral taste. All in all, it turned out well, and is much more convenient and better performing than the previous filtration. No complaints or problems reported by any other of the household. They adapted to it straight away.
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Reviewed in the United States on January 9, 2025 by Richard.
Set name: Alkaline Water (T1-400ALK)
I’ve had this system for about two and a half years now, so I figured it was finally time to leave a review. It’s worked really well the entire time, and most importantly, the water tastes great. One of the reasons I chose this model is the alkaline (remineralization) filter, which adds minerals back into the water after the reverse osmosis process. Just keep in mind that because of this, you should not expect a zero TDS reading. That’s actually the point. I personally didn’t want zero-TDS water and prefer having the minerals added back in. I also really like the tankless design. My previous RO system had a storage tank, and I much prefer having the water filtered on demand rather than sitting in a tank. This system does have a pump, so it needs to be plugged in, but that wasn’t a big deal at all with my setup. One tip after changing the filters a few times: I’ve found it much easier to take the whole unit off the wall, lay it on its side, and change the filters that way rather than trying to unscrew and replace them while it’s mounted. Overall, we’ve been really happy with it. Great-tasting water, reliable performance, and after over two years it’s still going strong. Highly recommended.
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Reviewed in the United States on August 20, 2026 by D
Set name: Alkaline Water (T1-400ALK)
After one week of use, I’d like to share my experience and explain why I chose this particular reverse osmosis system over others. There were two main reasons for my decision: 1. Filter flexibility (ALK to T33 option). This model allows you to replace the Alkaline (ALK) filter with a T33 carbon filter if needed. I wasn’t completely sure whether I would prefer alkaline water long term. With this system, I can simply swap one filter and get 0 ppm water if I choose. That flexibility was very important to me. 2. NSF certification. This system has internationally recognized NSF certification, which can be easily verified on the official NSF website. Unlike some brands that only pay for one-time testing, this certification provides ongoing credibility. For me, that really matters when it comes to water quality and safety. Packaging & Installation: Everything arrived well packaged and protected. The box includes many additional fittings for different installation scenarios — various tubing sizes and even the option to connect the system to a refrigerator. The instructions are clear and detailed. Installation took about 1.5 hours. The most difficult part was drilling a hole in the countertop for the faucet. I had to buy a diamond drill bit for that. My advice: buy a good-quality bit and watch a YouTube tutorial before drilling. I was surprised to learn that: 1. You need to keep the drill bit wet while drilling. 2. You should start drilling at a 45-degree angle. The unit itself is compact and doesn’t take much space under the sink. Water Quality Results Before installation, my tap water measured 176 ppm. After installation, it measured 70 ppm, because the ALK filter adds beneficial minerals back into the water. After one week, I performed a 14-parameter water test with the following results: Hardness: 50 Chlorine: 0 Iron: 0 Copper: 0 Nitrate: 0 Nitrite: 0 Calcium: 0 Total Chlorine: 0 Fluoride: 0 Alkalinity: 40 Carbonate: 180 pH: 7.5 Lead: 0 Bacteria: 0 Overall, the results are very reassuring. What I Would Improve I would like to see better filter replacement indicators. The current system for tracking filter life is not very informative. A clearer indicator or built-in reminder would improve the user experience. Overall Impression I am satisfied with this purchase. We drink this water daily, cook with it, and wash food with it. So far, the system performs as expected and gives me confidence in our water quality.
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Reviewed in the United States on February 28, 2026 by Iurii
Set name: Near 0 TDS Water (T1-400)
I bought this SimPure RO system because I wanted consistently low-TDS water. Initially, the output was around 4 ppm, which was excellent. After only about a week, it increased to around 10 ppm, and now the first glass after the system sits can read as high as 80–89 ppm before eventually dropping. I thought the original unit might be defective, so I replaced it, but the replacement had the same exact issue. I also contacted SimPure support about the problem. They sent me a new set of filters, and after installing them, the system worked properly for about three days. Unfortunately, after that, the water quality went bad again and the high TDS readings returned. I understand that some TDS creep is normal with RO systems, but this seems excessive, especially after experiencing the same problem with two units and a brand-new set of replacement filters. For a system that is essentially new, I expected much more consistent performance. Installation is easy and the water flow is good, but the inconsistent TDS and repeated water-quality problems are a serious concern for me. I will update this review depending on how SimPure handles the issue from here.
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Reviewed in the United States on August 23, 2026 by hamid
Set name: Near 0 TDS Water (T1-400)
See Update Below Original Review: Why is there no option to ask questions about this product like there is for most other products on Amazon? So I have to ask my question in a review because their customer service rep said to just not use a gasket, which we know is going to cause major leaking. The Sim Purewater water valve assembly will not seal to our under sink cold water shutoff with the provided gasket. Gasket collapses when nut is tightened and falls into the hole, because the assembly nut bottoms off on our shutoff valve before the nut can make a seal. Our cold water shut-off shank is too short for the Sim Pure valve assembly. If there was a thicker gasket, or a thinner water valve nut on the assembly, it might work. The gaskets are not compatible with our Shark shut-off valve nor the other two valve brands we have in the shop. Anyone have a solution? Update 6/14/23: We removed the thicker and more rigid packing washer from a new hose bib assembly that we had on hand and installed it in the SIM Pure water valve assembly in place of the thin, flimsy washer gasket that came with it. This worked perfectly to seal the Sim pure water valve assembly onto our cold water shut off valve under the sink. Additionally, the directions state and show to push the Sim water dishcharge tube all the way into the sink drainage pipe; however, the assembly that attaches this tube to the sink drain pipe does not allow the Sim tube to go through the assembly into the pipe (it will only snap into the Sim attachment assembly,) so we had to drill out the assembly hole to make it large enough for the Sim discharge tube to pass through into the sink drain pipe. Just don’t drill all the way into the “snap in” tube receiver on the opposite side of the assembly. Another reviewer pointed this out (thank you.) If you are not super handy around the house, have not regularly done other plumbing projects around the house successfully, and are not a patient problem-solver, we highly recommend that you choose a different system to purchase or that you hire a plumber. We found the technical help available by phone with Sim Pure to be useless. This install was very frustrating and we almost returned the product. However, once installed, we are extremely happy with the system. It is space saving, quieter than expected, the water flow is excellent and much faster than expected, and the drinking water is crisp and delicious. We only needed to do a water flush for 20 minutes and the water smelled and tasted great. However, we do already have a 3-stage whole house filtering system plus a water conditioner where the water comes into the house from the well. Rated four stars instead of five for faulty engineering parts making the install very frustrating and the lack of adequate help via the Sim Pure help line.
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Reviewed in the United States on June 12, 2023 by JJ
Set name: Near 0 TDS Water (T1-400)
I purchased this system close to 1.5 years ago and I have to say I love the quality of water it produces, the simplicity to replace filters as needed, the tankless feature, and the efficiency in term of waste water versus drinkable water which is 1.5:1 respectively. My city water is TDS is around 270ppm and after I used the simpure T1-400UV, it reduced it to 0ppm for the first 6 months then after it remained steady around 10-14ppm after 1.5 years and on. This is extremely clean per RO standards which is usually around anything less than 100ppm. The tankless feature has the major benefit of saving a ton of under-sink storage space which is already limited from the start. However tankless feature requires the user to flush the system every time for 1-2 minutes if it has not been used for an extended amount of time since the "still dirty" water is mixing with the clean water in the tank due to equilibrium. For the first 1-2 minutes of flushing, the TDS of my water is 50-120ppm then after 2 minutes it stays at 13ppm (1.5 years age of filters). If you always want instant clean water than a RO system with tank is needed. This system can produce unlimited clean RO water on demand once set up without running out as systems with tanks do. After 1.5 years of heavy use, I encountered an issue where the system turns off intermittently. I contacted Simpure and they were very helpful and accommodating even though my 1 year warranty has passed. It turns out from sending them videos that my control box was faulty which they sent me a new one and I replaced (5 minute job) and the system works like it was brand new again. Ellen was the Simpure rep that reached out to me and she was very patient and understanding. Very appreciative of her helpfulness and follow ups. Installing this RO system if very DIY if you watch videos on youtube. Or hire a professional which would cost $$$. Using this system has definitely eliminated plastic/aluminum waste from my home and the water quality is far superior to bottled water now per TDS measurements. Can use RO water for cooking, fish tanks, or carbonated water machines. Below you can see my city water which is around 270ppm , SimPure reduces this number to 13ppm which is extremely clean water. After installation it sits flush against the wall so you have plenty of space under the sink still. Overall I would highly recommend anyone to get this if they are looking for a efficient space saving RO system.
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Reviewed in the United States on May 16, 2025 by MC
Set name: Near 0 TDS Water (T1-400)
Got this for my parents for Christmas and they love it! Helps to eliminate micro plastics from your life(because they are everywhere and most present in bottled water). Works great and installed super easy! I would recommend this buy.
Reviewed in the United States on September 19, 2026 by Timothy
Set name: Alkaline Water (T1-400ALK)
It is an impressive system. I especially like the pump which greatly increases the water flow. Reverse Osmosis is as good as it gets for purifying water, but it is known to be a slow process. The pump appears to fix that. The unit also looks sharp when it is installed. Please see my photo. I never thought I would show off under our sink. :) It is a bit heavy in the cramped conditions under a sink, and it needs connections to continuous power (disposal power won't work because it is on a switch), the drain, water, the new faucet, and optionally a pressure tank and a refrigerator. Given all that, I think they did about as well as they could with the design. I connected all the tubes and nothing leaked at all. That is rare for me. Just be sure to push the tubes all the way in. Those connectors for tubes are helpful. So overall, the unit takes some time to install, but that is reasonable due to what it does and all its needed connections. It worked well the first time I turned on the water and plugged it in. I ran it awhile to flush it out according to the instructions, but then started using it and it has worked well ever since. The motor hums when water is turned on and a little after, but it is pretty quiet. The Alkaline water has a different taste than our other non-alkaline bottled water, but it tastes like it should and it is supposed to be good for us. I also learned that by switching out the last filter, we could change the taste to what we are more used to. For now, we are sticking with alkaline. I am really glad I bought it and got it installed. I put this off for too long. I bought the pressure tank too, which is needed to add water for a refrigerator, but it adds capacity for any install. I'd suggest getting it too. We are looking forward to canceling our bottled water service, with the big 5 gallon bottles. Thus far, it looks like the bottled water won't be needed.
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Reviewed in the United States on April 12, 2025 by Mark the Tech Lover