Pressure regulators are used to reduce the incoming pressure, that must be higher compared to the outcoming lower pressure. Thanks to the pressure regulator, it’s avoided that the equipment won’t break downstream, and that security valves won’t open and there is an excess pressure. Pressure regulators must be installed at the entrance of our own house, immediately after the water meter. But before the regulator, it is necessary to install a self-cleaning filter in order to protect the pressure regulator, especially in public places. Pressure regulators are not the same as each other, so we need to check regarding the detected characteristics rather than the declared ones.