This filtered water tap or reverse osmosis drinking water tap is what is used on many filtered water systems.
 
We stock this for customers wanting to dispense chilled or chilled+carbonated water. If you are looking to chill water you can simply put a ball lock keg into your fridge and run mains water through the ball lock keg and into this tap.  Another option is our carbonation reactor lid that you can also use to chill and carbonate water. 
 
Alternatively if you are looking for a stand-alone under counter chiller and carbonator then you cannot beat the Benchy Sparkling that you can run mains water supply to and this little unit will supply chilled and carbonated water to a tap like this.