In this method raw water in treated inside the boiler. This is a process of adding suitable chemical to residue scale &sludge formation. It is mainly based on solubility. This is a corrective method. This method is also called conditioning method.

Conditioning of water:-

Disadvantages of hard water in domestic and Industrially In Domestic use:-

Washing:-

Hard water, when used for washing purposes, does not producing lather freely with soap. As a result cleaning quality of soap is decreased and a lot of it is wasted. Hard water reacts with soap it produces sticky precitates of calcium & Mg soaps. These are insoluble formations.