Filter Upgrade Kit for Reverse Osmosis and Under Sink Water Filtration System – Add a New Filtration Stage to Your System – Includes Adapters for ¼” Threaded and Quick Connect Filters – Express Water

Worked great just like an OEM part.

If you want to add another filter stage or or an alkalinity booster, this is the kit. Fits most osmosis filter systems if the top filter is accessible. Other fittings and tubing make it an easy process that can up repeated every 6 months or year when replacement becomes necessary. Takes up minimal space under the sink by going vertically. Great product.

This gets the job done but they should give you more parts for the price your paying. 5' of tubing is just barely enough tubing, and I'm always losing those blue clips. Especially when you can get 100' of the same tubing from other sellers a lot cheaper. Disappointing that they are so cheap with what they include, it would only cost them a tiny bit more to include some more and would make the install a lot less stressful. Another pair of large filter clips would be nice too.

We had the reverse osmosis system and decide we wanted to upgrade to an Alkaline so we bought the add on kit and my husband installed in a few hours and now we have Alkaline, we are satisfied with the kit.

Great for adding additional stages to Water Express RO system. I did use 4 1/4 elbows to route easier.

Everything I needed to add the alkaline mod

Great kit for adding additional filters to your RO system, includes additional cylinder rings to add up to two additional filters and extra tubing and push fittings.

The Express Water Upgrade Kit came with everything that I needed to add the Alkaline / re-mineral cartridge stage. The only thing that was missing was the detailed instructions needed to install the additional cartridge. I was able to find information on line to do the installation of the additional cartridge stage. Express Water should include detailed instructions to assist with the installation of the addition cartridge stage.