I only bought the regular tank filter for chlorine reduction and we had our friend who is a plumber do the installation. He bought fittings and pipes etc to install it correctly. My town water went from completely nasty to tasting like I'm drinking out of bottled water I purchased at a store. No more jugs to haul up the stairs of my town home etc. and cleaning up spilled water everywhere on my hardwood floor due to the water jug to water dispenser upside down action. I started with just the chlorine filter because I thought maybe it would be enough for my skin to get that removed and I was right--my skin is no longer raw-even after one shower use.  No more slathering on moisturizer and Vaseline to my hands multiple times a day--the water does not damage my skin any more.