1、 The main reasons for electromagnetic valve leakage are: 1 There is debris inside the solenoid valve. 2. The solenoid valve coil burnt out due to unstable voltage. 3. There is foreign material in the silicone inside the one-way valve. Solution: Open the one-way valve to clean foreign objects, and grind the silicone surface flat with sandcloth. 2、 Oil leakage