Made from acid resistant AISI 316L stainless steel for optimum quality and durability. Some sizes are also available with a titanium case for increased corrosion resistance. Equipped with a thermostat for regulating the temperature of the pool water. Overheating protection prevents the heating element from burning out. The pressure sensor reduces the risk of heater burnout. ; Small size and compactness allow installation even in confined spaces. All heaters have a 2-inch mounting thread and a maximum permissible heater operating pressure of 10 bar.