---
product_id: 471043944
title: "T1-400 Tankless UV Reverse Osmosis Water Filter System 400 GPD"
brand: "simpure"
price: "S$740"
currency: SGD
in_stock: true
reviews_count: 13
category: "Sim Pure"
url: https://www.desertcart.sg/products/471043944-t1-400-tankless-uv-reverse-osmosis-water-filter-system-400
store_origin: SG
region: Singapore
---

# Built-in pump for steady pressure 400 GPD ultra-high flow 1.5:1 pure-to-drain efficiency T1-400 Tankless UV Reverse Osmosis Water Filter System 400 GPD

**Brand:** simpure
**Price:** S$740
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with near-zero TDS and tankless tech!

## Quick Answers

- **What is this?** T1-400 Tankless UV Reverse Osmosis Water Filter System 400 GPD by simpure
- **How much does it cost?** S$740 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/471043944-t1-400-tankless-uv-reverse-osmosis-water-filter-system-400)

## Best For

- simpure enthusiasts

## Why This Product

- Trusted simpure brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tankless & Space-Savvy:** Sleek under-sink design frees up cabinet space and prevents secondary contamination.
- • **Eco-Friendly Efficiency:** Minimizes water waste with an industry-leading 1.5:1 pure-to-drain ratio.
- • **Effortless Filter Swaps:** Quick-change cartridges deliver over 1000 gallons of premium water—ditch plastic bottles for good.
- • **UV-Powered Safety Boost:** Automatic UV sterilization ensures every drop is fresh and bacteria-free.
- • **Pure Water, Zero Compromise:** Removes 99.99%+ of 1000+ contaminants for crystal-clear hydration.

## Overview

The SimPure T1-400 is a premium tankless reverse osmosis water filtration system delivering up to 400 gallons per day with near-zero TDS. Independently tested to NSF/ANSI 58 standards, it removes over 99.99% of contaminants including heavy metals and PFAS. Featuring an 8-stage filtration process, built-in pump, UV sterilization, and a highly efficient 1.5:1 pure-to-drain ratio, it offers sustainable, space-saving, and reliable pure water on demand for modern kitchens.

## Description

SimPure T1-400 Tankless Reverse Osmosis Water Filter System 400 GPD | NSF 58 Standard UV Under Sink RO Filtration System | 8-Stage Filtration for Near 0 TDS | Built-in Pump & 1.5:1 Pure to Drain - desertcart.com

Review: Works well, but installation is a bit of work. - WHY is it so freakishly difficult to find an desertcart review to edit? Most of the help is either out of date or misses important steps. Whoever planned this aspect in desertcart 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.
Review: Great System. Still very happy after 2 1/2 years. - 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.

## 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.
- Filtered WATER NEAR 0 TDS: The water filter system utilizes exclusive technology to achieve near 0 TDS (Total Dissolved Solids), making it one of the most effective RO water purifier systems. It is designed to efficiently reduce TDS levels in tap water, even with initial levels as high as 200-500 PPM, to near 0 PPM or below 25 PPM. With a TDS removal rate of up to 95% and a maximum rate of 99.99%, you can trust that T1-400 will provide you with drinking water possible
- UV POWER & TANKLESS DESIGN: UV power 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 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 clear 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 purity and sustainability it brings
- Serving the USA Since 2006: Based in Seattle, WA, SimPure is committed to delivering world-class water filtration solutions. If you’re not satisfied with your purchase, we want to hear from you! Reach out to our team of trained water specialists—we’re here to answer your questions and provide support for the lifetime of your product. (Please scroll down for replacement filter purchase options)
- NOTE: If you enjoy filtered water with a low TDS value, we recommend getting the SimPure T1-400 reverse osmosis water filter. This system delivers clear water with a TDS level close to 0 ppm if your tap water has a measurement below 200 ppm. If you prefer alkaline water, consider the SimPure T1-400ALK RO system. This filter enhances the pH level of filtered water by incorporating minerals through the alkaline filter and please know that the TDS value will not reach 0 ppm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B14TM99T |
| Best Sellers Rank | #72,174 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #119 in Under-Sink & Countertop Filtration |
| Brand | SimPure |
| Brand Name | SimPure |
| Capacity | 400 gallons_per_day |
| Container Type | Dispenser |
| Customer Reviews | 4.2 out of 5 stars 1,402 Reviews |
| Filter Life Cycle | 6 months |
| Included Components | 1*machine, 4* filter, 1*faucet, 1*user manual, 1*sparing |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 15.6"L x 5.3"W x 15.7"H |
| Item Highlight | NSF 58 Standard UV Under Sink RO Filtration System | 8-Stage Filtration for Near 0 TDS | Built-in Pump & 1.5:1 Pure to Drain |
| Item Weight | 8 kg |
| LowerTemperature Range | 40 °F |
| Manufacture Year | 2021 |
| Manufacturer | SimPure |
| Material | Carbon Fiber |
| Material Type | Carbon Fiber |
| Maximum Flow Rate | 0.4 gpm |
| Model Name | T1-400UV |
| Model Number | T1-400 |
| Number of Items | 1 |
| Operating Pressure Range | 90 pascal |
| Other Special Features of the Product | Tankless |
| Part Number | T1-400UV |
| Power Source | T1 |
| Product Dimensions | 15.6"L x 5.3"W x 15.7"H |
| Purification Method | Reverse Osmosis |
| Special Feature | Tankless |
| Supported Water TDS Level Maximum (PPM) | 500 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 9 °F |

## Product Details

- **Brand:** SimPure
- **Capacity:** 400 gallons_per_day
- **Included Components:** 1*machine, 4* filter, 1*faucet, 1*user manual, 1*sparing
- **Installation Type:** Under Sink
- **Material:** Carbon Fiber
- **Package Information:** Dispenser
- **Power Source:** T1
- **Product Dimensions:** 15.6"L x 5.3"W x 15.7"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Tankless

## Images

![T1-400 Tankless UV Reverse Osmosis Water Filter System 400 GPD - Image 1](https://m.media-amazon.com/images/I/71OzxavyH1L.jpg)

## Available Options

This product comes in different **Set** options.

## Questions & Answers

**Q: what's the voltage of the pump? Can it be connected directly to a 12 or 24V system?**
A: The connection voltage is 110 volts AC .I do not recall seeing a transformer for changing voltage to DC.

**Q: how much room does it take up under the counter?**
A: The system dimension is 15.9"w x 5.2"d x 15.6"h, my system is underneath a country sink, which has the minimum space underneath of any sink that I am aware of & it fits just fine with a little resourcefulness.

**Q: where is this product made?  country of origin**
A: I have no idea but assuming in China.

**Q: Can I add a bladder tank?  Any issues with doing so?  I have a well and would like to have water if the power goes out.**
A: No this system was designed to be tankless, the pump would add too much pressure

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well, but installation is a bit of work.
*by R***. on January 9, 2025*

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.

### ⭐⭐⭐⭐⭐ Great System. Still very happy after 2 1/2 years.
*by D***D on August 20, 2026*

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.

### ⭐⭐⭐⭐⭐ Review – Why I Chose This Model
*by I***I on February 28, 2026*

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.

## Frequently Bought Together

- SimPure T1-400UV Tankless Reverse Osmosis System with UV, NSF/ANSI 58 Certified, Under Sink RO Water Filter System 400 GPD, 8 Stage Filtration Near 0 TDS, Built-in Pump, BPA Free, 1.5:1 Pure to Drain
- SimPure Small Water Pressure Tank for Tankless Reverse Osmosis System, RO Water Storage Tank with Fittings for Refrigerator, Ice Maker, Suitable for 1/4" and 3/8" Water Pipes
- SimPure T1-400UV 1-Year Replacement Filter Cartridge Pack Set for T1-400UV Tankless Reverse Osmosis Water Filter System (2*PP + 2*CTO + 1*RO + 2*T33)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-10-13*