Caleffi 5377 electrolytic anti-scale filter with magnet 1Caleffi 5377 electrolytic anti scale filter with magnet 1 The electrolytic anti scale device with filter and magnet is installed directly on the domestic cold water pipe and protects the entire system. Its action prevents limescale buildup, protecting the boiler, heat exchangers, and all connected devices, and ensuring long term heat exchange efficiency for domestic hot water production. In addition to the anti limescale effect, the system retains