DIG 25 psi preset pressure regulators are used to reduce and regulate the incoming pressure of a household’s water entering a drip irrigation or micro sprinkler system to the appropriate operating pressure of 25 psi, which is within the range of recommended operating pressures for a micro irrigation system. The pressure regulators' design includes few moving plastic parts and a diaphragm which regulates itself in reaction to the overall system back pressure. They offer exceptional pressure control and provide consistent outlet pressures over a wide range of incoming pressures.