Designed for kitchens with only a cold water supply and no hot water. Perfect for workplace kitchens that require a mixer tap and a separate Zip HydroTap in the same area. Enables hot and cold mains water from the mixer tap, with Boiling and Chilled filtered drinking water from the Zip HydroTap. The Four-in-One delivers four kinds of water supply from the two separate taps. It's that easy!