The opposite valve is a high quality component used to prevent the reverse of water and other liquids in the pipe systems, pipeline systems. This valve, which is 75 mm diameter, is produced by a metak brand and is presented as a long-lived and reliable product. The opposite valves are mainly used in water supply and heating systems and their function is to allow water to flow in just one direction. This prevents the equipment damage and system that prevented the system in the pipeline and preventing the system. This valve, which is resistant to corrosion and high pressure, provides high performance and reliability. The opposite valve is an ideal choice for both home and industry applications, both home and industry applications and increases the effectiveness of water and heat supply systems.