Method of correcting the chemical hardness of water under pressure in an installation (water heater) using ultrasound to reduce corrosion and scaling whilst also destroying harmful bacteria

摘要

Method of correcting the chemical hardness of water under pressure in an installation comprises applying low frequency powerful ultrasound waves to part of an installation, either a section of water pipe (16, 18) or a lower part of a water storage reservoir (1). The waves have a total power of at least twenty watts, preferably 50 W and a frequency not more than 1 MHz, preferably 28 kHz.