This RS Pro magnetic and electrolytic scale inhibitor stops and prevents limescale deposits in your water connections. Use this device to protect your hot and cold water systems. The item does not require grounding, which means you save time during installation. This scale inhibitor extends the lifespan of your pipes and other water connections by preventing the accumulation of harmful substances from hard water that flows through it. You will find it easier to clean surfaces like showerheads, as the combined magnetic and electrolytic functions effectively descale water installations. This item has WRAS approval (Water Regulations Advisory Scheme), meaning it complies with water supply regulations and Scottish statutes and can accept water from the main water supplies. You can use this item in both work and home environments on water fittings.