Inline, water heaters are ideal for processing fluid that requires intermediate heating while maintaining a flow rate. Instead of stripping the heat from another source as it would for a heat exchanger, an Inline water heater simply transfers the heat generated from electrical power into the target fluid. The main characteristics of the inline heater are for efficient heat transfer, the easiness to install and to maintain, and its high range compatibility with the current standard industrial piping. Applications such as waste oil, steam and water processing can use in line heaters in order to regulate and control the temperature, but also to maintain the fluid viscosity. To control the liquid flow rate of the heater, the wattage can be manipulated and regulated to obtain the de-sired temperature (in other words, the flow rate is directly proportional to the temperature/liquid viscosity).