WP-4V 4 stage reverse osmosis under sink water purifier by Watts Premier. Works great, we just upgraded to a newer system.

Newer tank - just a few years old

Also included:\

• brand new filters for every stage. New in packaging.\
• tank stand\
• housing wrench\
• filter changing instructions\
• faucet if you want it (great condition, but it seems to add a metal taste to the water)