It materials, and can be used for long-time. The water pressure relief regulator can the harm of water-hammer, increase the pressure of the systems, and reduce the leakage fault when the water flows quickly. The can greatly increase the water pressure at low water pressure, while maintaining the stability of water at high-water pressure. The voltages can be adjusted by without special tools. Turn counterclockwise to decrease pressure. The presets pressure value of the pressure reducing within the safe pressure of 2-2.5KG, which can be used directly. The pressure reducing to the 3-way ball-valve of the water inlet, or the water inlet pipe installed in series. It can be installed in most water purifiers, faucets and other water equipment.