Tool pressure adjustment: rotate counterclockwise to reduce pressure. Preset pressure value stays in a safe range of 2–2.5 bar for direct use. Improves flow at low pressure: greatly enhances water delivery when supply pressure is weak while preserving stable performance at higher pressures. Water hammer protection: relief regulator mitigates water hammer, increases system pressure stability, and reduces leakage when water flows quickly. Easy integration and compatibility: reduces pressure to the 3way valve at the water purifier inlet or can be installed in series with the purifier inlet pipe. Suitable for most water purifiers, faucets, and related equipment. Durable, compact design: built for longterm use with standard fittings and a compact footprint that fits under sinks or behind fixtures. Practical use scenarios: Homes or apartments with fluctuating or low mains pressure to improve showers, taps, and overall flow. Upgrading a water purifier or filtration system to ensure steady, protected supply. Plumbing runs prone to water hammer, valve closures, or leakage issues to reduce noise and wear.