iSpring FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter

Installed a simple iSpring system and few years back. Recently decided I needed to add minerals back into the water as it was too close to zero. The iSpring system pulling water after it goes through a prefilter, softening and an iron curtain it maintains less than 8ppm with yearly filter changes. Adding this onto the system made the water much more drinkable and silky smooth. Now I'm sitting at 14ppm which is still low but the taste has improved and makes drinking water more enjoyable. Filter works as intended, should have done it sooner.

The media could not be loaded. I have had unit RRC1UP-AK7 from 123Filter.com for over 7 years now. I have never written a review, but after I bought another filter set I had to write a review. This unit has been a game changer for my household and health.To start off, the unit is super easy to install, I mounted it under my kitchen sink. Works just as described in every way. The unit strips my water of everything bad, while adding the perfect blend of minerals back and alkalizes my water before passing though a UV light, giving my family the safest healthiest water.The filter changes are simple once you understand the replacement process. It may be a bit overwhelming at first, but gets very easy for even someone that may not be the best handyperson. My best advise though is watch videos about filter changes and make sure where ever you install it you think about when its time to change the filters. I left my unit with excess hose, so I can pull the unit out from under the sink. ( I hang the unit on my cabinet door to make the changes)Over the time I have had my RO system I have had two issues, one with the UV set, and one with the alkaline filters, but both times the customer service at 123 Filters are prompt, courteous and knowledgeable. They respond quickly and have the feel of a small town business, but they are no small business. I know I may be going overboard giving 123 Filters props, but "in todays world" if a business is doing what any customer would actually expect of a business, I want to give them their dues.I have 123 Filters RO system (listed above), their 15 stage shower filter, and the 3 stage whole house water filtration systems (WGB32B), and we are happy with it all.Again, props to iSpring, props to 123 Filters for selling great products and backing it up with amazing customer service.

where I live the water taste like sulfur and I won't drink it and I didn't want to keep buying bottles of water . so I got this ro unit and the water is fantastic ! I had an issue where my UV staying on and I called support and got a man named nick. he knew exactly what was going on and is sending out a replacement part. RO unit is great and service is also great.

If you're serious about coffee, you know that water quality is everything. This iSpring alkaline filter doesn’t just clean the water—it enhances it. By restoring essential minerals and balancing pH, it gives my coffee that perfect, clean taste every single time. Installation was a breeze thanks to the quick-connect system, and maintenance is simple. I can confidently say that since adding this to my RO system, my espresso shots taste smoother, and my customers have noticed the difference! Plus, iSpring’s customer service is next-level—Nicholas personally made sure my system was running perfectly. If you own a coffee shop, this is an absolute must for consistency and quality.

Two of these (instead of one) should be included in the "1 year" filter replacement kits which contain 2 of all the other filters (except the RO unit). This has been quite bit of annoyance since I change all 5 filters (stage 1, 2, 3, 5, 6) on minimally used once a year and the RO unit (stage 4 I believe) every two years. So this causes me to buy one of these every two years (along with the RO filter).The unit arrived well packed was all sealed up and included a parts kit.I have to knock off a star for the annoyance of iSpring not including 2 of these instead of 1 in their water filter replacement kits.

I installed a reverse osmosis system for my particularly hard incoming water, and although I'm confident in the cleanliness of the output, the taste of that water is a little flat. Turns out, an RO system filters out beneficial elements as well as the bad stuff, and this inline remineralizer filter restores those elements back into your water. Taste can definitely be subjective, but this filter makes my RO water crisp and tasty.

Going on 6 years now, with my iSpring RCC1UP-AK 7-Stage Residential Under-Sink Reverse Osmosis Water Filter System w/ Booster Pump, Alkaline Remineralization Filter, and UV Sterilizer.The quality of the product and price point is perfect - it does the job, and does it very well. I've had no issues since owning and installing the unit (very straightforward, excellent directions - and online videos!).As for customer support - every interaction with the company has been excellent. They respond quickly and are very helpful. One recent example was when I was changing out one of the filters, I accidentally mis-installed the fittings on one of the cartridges - my bad as the instructions were clear but I was very distracted that day and mixed up which end each fitting was to be installed in. I was very sad for only a little while, because in comes Nick from ispring customer support to the rescue! I described what had happened, sent some photos, and Nick patiently walked me through a couple techniques to resolve the issue. Since those didn't work, Nick sent me a completely new replacement cartridge with fittings!!!I was not expecting iSpring to do that - as it was my own mistake! Goes to show you that iSpring stands behind it's products and understands that DIYers can sometimes run into trouble and they are there to help them!Thank you Nick and the entire iSpring team for delivering such an excellent water system.