The NuvoH2O Water Heater System not only prevents hard water build-up but it reduces and removes existing scale, helping to restore your water heater to near-new efficiencies. It was engineered around a compact, integrated cartridge and housing with a quick-connect design that makes maintenance quick and easy. The self-locking mechanism assures a leak-proof connection in seconds without all of the mess typically associated with the cartridge replacements found in competitive systems. Eco-friendly design uses no salt, no waste water, and no electricity.