FreezeFreeHose heated water hoses are a freeze free revolutionary self regulating heated high quality drinking water hose. Self regulating using PTC technology means a thermostat is not necessary. For even more energy savings you can still add an external thermostat like the Add-A-Stat (sold separately). As the water in the hose gets warmer, the self regulating heater will produce less heat and when the temperature gets colder will produce more heat keeping your water flowing. Other heated hoses waste the heat you purchased by applying the electric heat source to the outside of the hose allowing a large amount of the heat to escape. The FreezeFreeHose has a full length grounded flexible PTC heater inside the high quality drinking water hose surrounded by water like your home electric water heater. The FreezeFreeHose is a drinking water safe hose, that plugs into a standard 120 volt GFCI socket, to keep hose from freezing. Uses include RV drinking water supply, watering livestock, construction sites or any watering applications in below freezing temperatures.