The hinged bowl is designed to lift up for easy cleaning, as well as quick access to all internal components.Stainless steel bowl construction ensures long life, and eliminates the risk of chipping paint and rust contamination. Canarm heated livestock waterers come with either a 300 watt or 500 watt thermostatically controlled heating element. An external pilot light, which is visible from a distance, glows when the heater is operating. The thermostat is adjustable and can be accessed through the control cover. The nylon control valve is designed for trouble free, year around operation. Strong, double wall design. -4X Corrosion Resistant -2” of injected polyurethane insulation. -R15 insulation value one of the highest in the industry. -Energy efficient – saves you money. -Hinged top for easy cleaning. -CSA Approved