Tap water and RO water in one unit.
"I didn't care to put another hole in my granite countertop. Enter this faucet that supplies hot/cold tap and RO water. It doesn't do your taxes like some faucets seem to advertise, but it does keep the countertop looking sleek and uncluttered. I also enjoy the faucet connects with a basic NPT fitting instead of some proprietary nonsense. However, it was strange that this faucet did not come with the PE tubing or fitting to connect it to a RO system. Though the APEC RO systems seem to come with these parts by default, so you don't need extra parts if you use an APEC system. My only first-world-problem is that I wish the armature length was longer. Feels like the faucet only pours into the rear 1/3 of my sink."







