Product review (5 stars): Water Tastes Great
Replaced an under sink "3 filter" system that produced water didn't taste very good.  Plus it was time to change those filters and this company charge $60.00 for the 3.  This Culligan unit  removes all chlorine taste and results in a crisp, clean product.  Since I had the previous pluming set up under my sink to a drinking water faucet, I just had to downsize the one run, from my cold water supply (3/8" to my original filter).  I used a 3/8" to 1/4" Watts fitting from the local box store.  This unit requires 1/4" OD flex on the inflow and outflow.  I left my 1/4" flex that led to my drinking water faucet.  That run was plug and play.