Directly plug (no thread type) electric heating : It is sealed by silicone ring installed in the tank. This type can be only used for non-pressurized solar water heater tank. The thermostat setting temperature valve: 75degree.Once the temperature reaches, it stops working. It is a protection device. Not a regular working device.
It has different size , size in 22mm ,47mm,58mm. Power : 1.5KW