6-Stage Under Sink Reverse Osmosis Drinking Water Filter System with Alkaline Remineralization, NSF Certified

The short review: Good RO system. I wish that I bought it earlier. My back is happy because I don't need to carry cases with Spring Water anymore. The long version: This is a very nice and thought through system. I loved color coded tubing and connectors - that makes the installation really easy. Everything was provided in the package. I only needed to buy plumber's teflon tape for the valve on RO tank, which is sold for less than a dollar in any hardware store. I liked the clear housing for the sediment (stage 1) filter. I didn't like, however, what I saw through that clear housing - the filter has turned from white to deep yellow in just a week because of the rust coming from metal pipes, and that's from the municipal water supply.... Anyway, after a week of having the RO system under the kitchen sink I decided that I want to move the system to the basement and free up the space under the sink for the usual crap. I bought additional RO tubing so that it reaches to the basement and moved both RO tank and filters out of the kitchen. I put the RO tank on the top shelf of the shelving unit and attached the small shelf for RO filters to the same shelving unit. I drilled a hole in the cleanout plug of the waste water line and squeezed the waste water tube from RO into that hole. I made sure that the fit of RO waste water tube in the cleanout plug is very tight so that the waste water line stays sealed. The longer tubing that I bought was blue color, therefore you see in pictures that the RO feed water line and filtered water line to the RO faucet are both blue. I put oven trays under RO filters and RO tank so that even a small leak is collected and visible. I put the shutoff leak valve that came with the system into the tray next to RO filters. I used plastic clips for TV cable to attach RO tubing to the back of the kitchen sink cabinet. I was worried that moving the RO tank to the basement would weaken the water pressure in the RO faucet (because the water now has to travel up from the basement to the kitchen), but this was not the case. The water pressure in the faucet is as strong from the basement as when I had the tank installed under the sink. Pros: No back pain from hauling Spring Water into the house, cost savings over buying Spring Water. Cons: I now know how bad my municipal water is by looking through the clear housing of the sediment filter.

Well made for the most part. The mounting bracket could be a bit more rigid. Most of the parts are of good material. I think the mineral filter is a good idea. The resulting water taste is good. Not that it jumps out as being something special, but is not flat nor too strong. One of my daughters (the health-nut) is now sneaking over to our house with jugs to fill up every week. I did one thing differently based on someone else's review. She complained of an initial heavy mineral taste if the unit sat too long not being used. Directions show filter at very end of system. I plumbed my mineral filter upstream of bladder-tank so that any heavy rush of minerals would get diffused in the tank. So far, no such problems. This is a good sized unit and I highly recommend a basement-wall installation if possible, then run the final output line up to the sink. This is connected downstream of my water softener and I no longer get that funny softened-water taste.

This is overall a great RO system. Instructions were very easy to follow. Had some slight hiccups, but Francis from ISpring customer support made things a breeze and got me replacement parts right away, no charges. Make sure to check for leaks daily, just like the instructions say! One thing to note, if you have a sink with just one drain, you will need to purchase an adapter from the largest online retailer(ET116-001 Drain Line Adapter (DLA) With 1/4-inch Quick) to run the waste through. Would recommend this way anyway just so you don't have to drill through your pipe. System(any RO system) is bulky, I plan on moving mine down to the basement one day. My water quality went for over 600 PPM, down to mid 40s, water taste great to both my refrigerator(purchased icemaker kit) and as well as the provided water dispenser. Overall one happy customer and looking forward to my many years of fresh, high quality water.

I bought this system because it appeared to meet everything I was wanting in a RO product. Installation was easy enough, but requires working in tight spaces. The instructions were ok, but I did them in different sequence as the manual had. I waited until I was sure there were NO leaks in the connections before i drill into my drain pipe. I also, installed the faucet before anything else, due to very limited space. The color coding really makes the install easy. Installing the mounting bracket requires moving a couple of cartridges out of the way to get to both side for drilling, again very limited space. Be careful not to crimp the lines when moving the cartridges. If I had to do it again due to very limited work space, I would removed all the drain piping to allow extra work space. Overall because it took about 30 minutes. Flush the system as the instruction manual says, and it's good to go. The water taste great, so be sure to do a side by side taste test to see how much better the iSpring water taste! Time will tell, but would buy it again!!

This system is fairly easy to install. Just follow the detailed instructions. Once installed, enjoy safe drinking water and ice. After installing, the totally disolved solids were reduced from 173 to 8. My daughter had a company install a RO system at her house for 10 times the money and it did not include mineral infusion. She said ours tasted fresher. If you have infants or growing children, please have your water tested and get one of these systems to keep them safe. You watch what they eat, right? Then pay attention to what they drink!

We have been buying bottled water for drinking because our water here tasted wired and has lots of calcium. It’s very hard water we have in our city. I’m very happy of the quality of water I get out of it. Plus I’ve saved a lot of money. I think it’s the best investment so far.

We have been using our system for about two months. Our water is heavily treated and the I spring system makes our water excellent for drinking. Installation was relatively easy too. The faucet is very nice and we have received compliments on it’s clean look.

I have been using the system for two months now. The system was easy to install. I completed the installation myself in a few hours and that included the time I took to configure its position under my sink to maximize the amount of usable storage space after the unit was permanently mounted. The quality of the water is outstanding. Our local water supply currently fails public health regulations and this system filters the water to a level exceeding the health standards. I use the water for all cooking and drinking needs, including water for my puppy. Speaking of my pup, he shredded the owner's manual and bag of spare parts that came wit the unit. Don Huie, at iSpring customer service was fantastic and has sent out rplacements of each. I am very impressed with the unit itself and the customer service from iSpring.

Excellent product and quality water..worthy....easy installation.

I have used ISPRING 6 stage water filter system for 4.5 months. I used it everyday, drinking, cooking and source water for my Zojirushi water boiler. It is running great now with TDS 110 (tap water) vs 7 (filter water). No leakage.