---Size compatibility: As the name suggests, the valve is designed for a 22mm pipe system. This is the standard size for many domestic water supply lines, making the 22mm pressure reducing valve an ideal choice for most homes. ---Pressure control: One of the key features of this valve is its ability to reduce and regulate the pressure of the water that flows through it. It's designed to reduce high incoming pressure, typically from municipal water supplies, to a safer, more manageable level for domestic use. ---Built-in strainer: Many 22mm pressure reducing valves come with a built-in strainer. This helps filter out any debris in the water supply that could potentially damage the valve or downstream equipment. It's a valuable feature that adds an extra level of protection to your plumbing system.