Two-way solenoid valve 8514 by Ceme. The solenoid valve is an accessory found in central heating systems and it allows the movement of water. It functions similarly to a simple valve, but in this case, it uses a motor that receives an electronic command for when to open and close. It is two-way, which means it has 2 ports, one for water intake and one for water output. When the intake is closed, the flow is interrupted, while when it is open, the flow at the intake is the same as the flow at the output.