3 Models to choose from (2.5, 4, and 8-Gallon) Adjustable thermostat with thermal cut-out Dielectric isolation on inlet/outlet connections Units can be wall hung (bracket included) or floor mounted Durable poly-composite housing will not dent and resists corrosion Temperature/pressure relief valve included (plumb correctly for discharge) Simple 120V plug-in connection 8-year residential or commercial warranty Simply tap into the cold water line and install the water heater directly at the sink. All Ariston Pro Ti GL models plug into a standard 120-volt outlet. And when you want to eliminate the wait for hot water but need more volume, install the Ariston Pro Ti water heater in-line with a larger hot water source. ...