It is called instant faucet or quick faucet, including faucet body and water flow control switch. The faucet body is provided with a heating chamber and an electric control chamber, which are separated by a sealing plate. The electric control chamber is provided with a heating circuit, and the heating chamber is provided with a heating circuit. Heating tube, heating tube power is generally 2-3KW, 3-5 seconds to heat the hot water, the heating tube is connected to the heating circuit, characterized in that the heating tube is an insulated heating tube; the insulating heating tube is hydroelectric isolation Insulation heating pipe; the faucet body is mostly high temperature resistant engineering plastic type, a few are all metal type; the electric control cavity is provided with an insulating water pressure switch. The heating circuit is provided with an electrical switch, which is connected with the end of the insulating water pressure switch, and is connected to the water and electricity. The temperature controller and the anti-drying device are arranged therein, and the leakage protection switch can also be provided.