iSpring US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon

The iSpring US31 is an outstanding under-sink water filtration system that combines ease of assembly with top-notch performance. Installation is a breeze, thanks to clear instructions and simple connections, making it perfect for DIY enthusiasts. Once set up, the water tastes clean, fresh, and free of any unpleasant flavors, elevating the overall drinking experience.The design is sleek and compact, fitting seamlessly under most sinks without taking up much space. Additionally, the long filter life is a standout feature, requiring less frequent replacements and providing great value over time. Overall, the iSpring US31 delivers excellent taste, convenience, and durability, making it an excellent choice for any household.The extended warranty was easy to activate (thanks to their customer service's rep Julius) and it offers 3 years which is pretty generous.

I bought this system to filter water for a plumbed Keurig K150P coffee maker. The one filter solution recommended by Keurig is not that good. The filter quality or capacity is nowhere near the level that iSpring offers. It takes 2 stages to get the Chlorine taste out of the water. This 3-Stage system is outstanding. The water taste great and there is zero waste like there is with an RO system.I believe this is one of the best water filtration systems on the market. The price is fair, the company has an excellent reputation, the filters are built well, and it comes with every piece and part needed to hook it up. Most systems require a few trips to Home Depot to figure out all of the parts, line sizes, etc. that is needed. This one comes with everything you need including a faucet! I personally did not use the faucet and plumbed directly to a coffee maker, but it is certainly nice that they provided one. I assume most will use this system for drinking water. It is also super easy to Tee one of the lines if you want to provide filtered water to more than one location (e.g. Ice Maker, Coffee maker). These 1/4" plastic T's work perfectly (https://www.amazon.com/gp/product/B013ZX72ZE). The company ships more than enough feed line for most normal sized kitchens. If you need more it is easy to find 1/4" plastic ice maker line. They sell it everywhere.The only thing to keep in mind is this is not a small unit. It is big. It takes up a lot of space and it needs to be screwed to a wall/cabinet. It would not be a good idea to let it stand on its own. If it fell over it could cause problems with filtration. The advantage to the size, however, is it has room to hold quality filters. It does a great job cleaning the water. Our coffee tastes as good, or better, than most commercial shops.I am very, very pleased with this purchase. I highly recommend iSpring. Their customer service is excellent as well. Email them any question you have and they respond quickly.

I recently purchased the 3-layer water filter for under the sink, and I’m really impressed with its performance! The installation was straightforward, and the water quality has improved significantly since I started using it. The filter works well, providing clean, fresh-tasting water for my family.I also want to give a special thanks to Sean, the customer service representative, who was incredibly helpful when I had a few questions about the product. He took the time to answer all my concerns and made sure I was fully informed. Excellent service!Overall, I highly recommend this water filter to anyone looking to improve their water quality. It’s a reliable product with great customer support from Sean!

Update 6/23 - replacement fitting arrived and installed in minutes. No leaks so far. We primarily bought it to filter out random sediment found in our water which we use a zero filter water pitcher but was getting tired of refilling.NYC Tap water is generally great so we weren’t looking to alter taste. As a note, we replaced the third stage with a 1micron filter to help take out any lead just in case. It seems to work well. Water flow is very good (it sputters because of the filter) and the taste ever slightly different. Due to the new replacement filter the TDS is higher than the zero water but we read the process to remove lead replaces it with other minerals increasing TDS levels.Looking forward to seeing the stage 1 filter get dirty through the clear plastic housing to remind us why we went this route.Disappointed we had to wait a week to use this but happy the response was quick from the seller. Things happen so we’ll chalk it up to that. Happy with the purchase and product.As a note, install was into a 24 inch IKEA sink with sliding drawer front. It was a tight fit but it fits without interfering with the drawer.Update 6/18- Nick from iSpring contacted me first thing this morning to let us know a replacement fitting is being sent. We are super excited and eager to get rid of our water filter pitcher and have high hopes this is only a speed bump. We purchased the ice maker kit and installed that while we wait.6/16 (Saturday PM) Okay, so I do not hate it because I haven't used it yet. I just hate that it arrived with a broken water faucet elbow/fitting which basically makes the system a paper weight until I get a replacement. I've contacted the seller to request a replacement and will update this once they respond.On the flip side, the system installed in less than 30 minutes with the most effort used towards getting under the counter to secure the water faucet from underneath.Instructions are brief and not well laid out but all the components are fairly well laid out which allows the install to be manageable. instructions could be a bit more organized and broken down but install is logical if your have minimal experience.The connections appear secure but I won't be able to test for leaks until I get that replacement part. So close...yet so far away!One of the primary reasons we choose iSpring is the clear housing and it doesn’t disappoint in terms of look. We have a lot of rust and sediment so we are concerned about swapping out the sediment filter in time to not impact stage 2 and 3.

Install was very easy, water tastes great. My faucet started leaking internally after a year of daily use, so I called the service line and they sent a replacement faucet the next day. Although the faucet leaked, the support from the company was exceptional and I would recommend buying from them. Thanks again!