If this is the case, one reason is because the supplement to the cold water pressure inside the water heater pressure is greater than the take-off safety valve caused, so even without heating relief valve in the drip, particularly at night, when low water peak, municipal water net of higher pressure, this phenomenon is more obvious, to solve this problem valves can be installed on the home's water pipes, the water pressure from the high pressure of municipal water network drops a suitable pressure, so you can ensure that the entire house The pressure is not overpressure, and can play a very good water-saving effect; if the cold water pressure is not too high dripping, then there may be a safety valve is broken, the proposed replacement of a quality assurance of the safety valve