iSpring PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters

Excellent filter system! You really can tell the difference. The water tastes pristine, and you can even see how much gunk it removes from your tap water when you periodically change out the filters! The customer service is also top-notch. Every interaction I've had, they're extremely responsive and helpful -- Sean especially is amazing.

Sean took incredible care of me! I had one small issue with my system and iSpring customer support was insanely quick to help and shipped my part out immediately. I was back up and running in 2 days! This system is relatively straightforward to install and can be done by anyone with a DIY attitude and YouTube. The system works as it should and our water tastes great!

I installed the PH100 around 2 weeks ago and am extremely happy with it. The water tastes fantastic. It is purified through 5 stages! And the 6th alkaline stage gives the water a great taste. There are no off putting smells or tastes, just great healthy water. Coffee tastes better, tea tastes better, green drinks taste better, and just a glass of crystal clear water tastes better. So I am essentially done with plastic water bottles. The installation took me about 4 hrs. mainly because I don't like hoses dangling so I fastened all of them to the inside of the cabinet under the sink and that takes a bit of time with all of the plumbing and garbage disposal under there, and I like to measure twice before cutting hoses. Expect a few leaks when you install, but you fix them one by one as you go because the install process is orderly via the official YouTube video. The install leaks if you have them are simply connectors or hoses not seated properly and in my case one of the three prefilter canisters was not screwed in tight enough. There was nothing in the install that was frustrating to do. The physical install was straightforward and easy and any troubleshooting was not hard to do. There is a flushing process during several stages of install and after install I flushed the complete system 3x. At my house the tank fills up quickly, in less than an hour, so probably 35-45 min. Which is fantastic. After install I had one very slow leak on the cap of the RO canister. The leak was very small and I called iSpring they send a completely new housing and connector set quickly and at no charge. The water flow from the tank out of the faucet is fast. Filling up for a pot of coffee is a short wait and you fill a glass of water very quickly. And the TDS numbers: Pre: 129 / Post: 19 (because of the alkaline) The PH numbers: Pre 7.5 / Post: 9.7 (the day of install) In the end I am extremely happy that I made this purchase.

After a lot of research, and questions to multiple companies, I purchase the iSpring PH100 6 stage under sink reverse osmosis filtration system, and I love it! Some of the main reasons I decided to go with iSpring are their overall reviews, company age, customer service, and the fact that they use filters readily available anywhere, nothing proprietary. Many of the other companies use their own special filters that they can change prices on whenever they feel like, without an option to get them anywhere else, or if they should go out of business, you will have a system with no filters available. When I reached out to iSpring with a few questions, Laurence got back to me right away, and was very helpful. He answered all of my questions in detail, and when I had follow up questions, he got back to me again, and always told me to reach out again anytime. I feel very confident I will have support if I should ever have any issues or questions with my system. Installation is very easily done DIY, just watch a few videos on YouTube, and look over the detailed instructions that come with the system, and you should be good to go! It does take up some of your under sink space, but not nearly as much as I anticipated. I was still able to get some of my cleaning supplies back in the space. My water quality and taste have both improved drastically, and I couldn't be happier with it. I also bought iSpring show head filters, and those have improved our shower water quality, noticable in both our hair and skin health. Overall, I am very happy with this system, the company, and all the help I received from Laurence. If you are in the fence, just do it, you don't regret it!!

This is my second iSpring filter system. Both have produced fantastic water quality and with an RO system you know you're getting absolutely everything out, including heavy metals and things many other systems leave behind. Both systems I've had were easy enough to install -- the products come with clear instructions and all the tubes and fittings you need. This particular model has the added bonus of being extremely efficient for a reverse osmosis system -- there's a 1:1 finished product to waste ratio, meaning for every 1 gallon of purified water you're only dumping 1 gallon of waste water. Compare that to many other systems that are 1:2 or worse and you're saving a LOT of water getting this model. Good for your monthly bills and good for the planet. A win-win scenario. Combine that with the 100 gpd flow rate and this is truly a best-in-class system! And to top it all off, this one uses filters made right here in the U.S.A. That's an extreme rarity in this market nowadays as nearly everything else is made overseas. Now if all that isn't enough to convince you to buy this, I have to add that the customer service from this company is excellent. I've had to contact them twice -- once for some missing components, and once when I bought the wrong filters. In both cases, they responded quickly and got me back in action right away. The first time around it was their fault -- I was missing one of the fittings with a new unit. They sent out the fittings right away and I had everything I needed in a few days. The second time around was completely my fault -- I ordered the wrong filter set. Even though this was totally on me, Sean at iSpring went ahead and sent out the proper filters to get me back in action. That was an unexpected case of a company going above and beyond to take care of their customer. Such a rarity nowadays! So stop researching and just buy this unit. You absolutely won't be disappointed. The quality is great. The company stands behind their products. And the customer service is excellent should you ever need help. You can't go wrong here.

We absolutely love the taste of the water from this RO. We've also had the water tested and it does what they say it does. Couldn't be happier with that. We opted to have the unit installed by a plumber because I don't mess with water period. There was an issue one time early on. We were going to be away for an extended amount of time and I turned of the main water to the house. The feed water adapter on the unit leaked and made a pretty big mess by the time it was noticed. I worked with Sean at iSpring who was very helpful and sent a new adapter. When the plumber came back to put it in, we tried to replicate the problem and it didn't leak this time. We put in the new adapter anyways and tested it a bunch and it hasn't leaked since.

I've been a lifelong believer in tap water. It's cheap and healthy, my town checks the quality and reports on it quarterly. Well, thanks to our friends at DuPont, the proliferation of teflon products and firefighting foam, that's no longer true. Google: "Tap water study detects PFAS ‘forever chemicals’ across the US | U.S. Geological Survey" and read the report. There's a good chance your tap water, like mine, has been contaminated. There are only two realistic ways to drink uncontaminated water now, buy bottles (and enjoy microplastics) or treat the tap water ourselves. Some "pitcher-style" filters can remove all PFAS chemicals, but many do not, and built-in refridgerator filters (typically activated carbon) do not allow the water to stay in contact with the filter long enough to remove 100% of the contaminants. Reverse osmosis systems are proven to remove PFAS among a variety of other problematic materials and chemicals. Personally, I'm too lazy to wash out the pitcher every few days to keep mold from growing, so I went with this more permenent solution from iSpring. I mounted the unit in my basement, near the ceiling, just below the fridge water line. I also swapped my sink faucet to one that includes a filtered water option instead of drilling through my concrete to install a seperate faucet for the RO. The health risks when exposed to even 2 ppt PFOA (One parts per trillion (ppt) is akin to one grain of sand in an Olympic-size swimming pool) can lead to the following health conditions: - Increased cholesterol levels - Changes in liver enzymes - Hormone disruption and increased risk for thyroid disease - Decreased odds of women becoming pregnant - High blood pressure or pre-eclampsia during pregnancy - Small decreases in infant birth weights - Decreased vaccine response in children - Increased risk of kidney or testicular cancers The interactive map at the U.S. Geological Survey website will show that almost half the country is exposed to levels higher than this via their tap water. It's beyond criminal that corporations continue to poison the planet, but as long as they do, take care of yourself and your family by filtering your water. UPDATE: The RO cap on my unit had a very small leak (maybe one or two drops a day). This wasn't one of the connections I touched, but came preattached. I didn't have a replacement fitting, so I reached out to iSpring warranty support and Nick was extremely helpful. They sent along an entirely new RO stage housing and fittings and now the problem is fixed. I really appreciate the quick and easy warranty process, especially for minor things like this.

Pro’s What sold me are all the filters are made in America. Well built unit similar to the commercial one I had at my work. Good value for the money. Comes with extra fittings, extra filters if you want to add to the order. Hose and parts needed to install pluse wrench to tighten the cartridges. Everything except the tools to install, common design to fit below a sink. Con’s Instructions are pretty good, but not exactly as well as it should be. 1) hose in instructions show a yellow tube, Blue tube that it didn’t come with. Used the white tubing for these colors that the book showed to use yellow & blue tubing. There’s a lot to read and follow and do. The steps could have been better laid out, Advise others to watch a few YouTube videos to see how others did their work. Taking the plastic wrappers off the filters is important. Make sure you do that and then replace them and tighten the cartridges. Bleeding out the air & purging the system is important. Flushing out the cartridges first & then the other filters till water clears and comes out clean, let water out of the system & them turn on the tank, flush out at least 2 tanks or more. It’s a little challenging but taking your time is always worth it as you can save time not having to chase leaks or redoing some steps. Bubbles are common Once you start using the system, but they don’t tell you that. Clears up after using it for a while. Just bubbles not sediment.

I bought this to replace my old under sink water filter, which did its work mostly to filter out the metal and other harmful materials except TDS (~140+ from the tap). Before started using this new filter system, all my kettles always have a layer of limescale that I have to clean it every month, so annoying and it impacts the taste of my tea and espresso. Now I have been using this new iSpring filter for a month. So far, there is no any visible hard water buildup, excellent filter! the TDS is about ~20 (keep in mind, 6 stage filter restores healthy minerals and a natural alkaline balance, so this is normal), the water taste is certainly improved, especially my espresso, totally a game changer! I did have an issue - the yellow tube was missing from the package. I contacted customer support, they replied back quickly and shipped the missing parts to my house. excellent work, Nick, provided such a great customer service!

My third iSpring system that I've installed in my last 3 houses. Very easy to install and offer great tasting water. The system itself is very solid and I've never had it fail once installed. I've recommended this to several people that have ended up purchasing it as well. I had a couple of minor issues with this one (missing tubing in the package), so I contacted customer service. The customer service team, Francis in my case was great in responding and made sure that the mistake was addressed, and I'm once again a satisfied customer.

This system has been installed for a year snd provides great tasting water. We purchased along with s pressurized holding tank and delivery pump which allows for better pressure with a 3/8” line for use with our pot filler. I originally consulted people at iSpring to ensure I purchased the correct components and they were very helpful and happy to assist. I recently purchased a 3-year pack of filters, and upon trying to install them realized they were the wrong ones (1/4”). I contacted iSpring and spoke with Michele, who was super helpful and arranged to send the correct filters at no cost as they were not currently available on Amazon. Couldn’t be happier with this item and the service from iSpring!

Bought the iSpring PH100 replace my old RO sytem which has very slow flow rate. Unfortunately, the system came missing the last stage alkaline filter. Contact iSpring customer support with the help from Sean who kindly sending me the missing filter with additional connectors. The talk with Sean was smooth and pleasant. I did install the system without the missing filter which was easy took me less than 30 min. Now I have a RO system with good flow rate ans water taste good. The last step is connect the re-mineral filter once I receive it.

I had issues in two different occasions and both tech supports that helped me were great - Don and Nick. Thank you And thank you again Nick for the fast shipping of my faucet.