Safety valve by Brass Form, suitable for use in an electric water heater. The safety valve is installed in a central heating system to protect it from excessive operating pressure. When the pressure exceeds a predetermined value, it opens to depressurize the system. Its role in the installation is very important, as increased pressure poses serious risks to people and materials. It is installed at the highest point of the installation without the intervention of any switch or valve.

It is two-way, meaning it has 2 ports, one for medium intake and one for 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.