Water quality play a important role for boiler safety & stable running. If you don't take meature to treat water softener, its very harmful to the boiler in a long time.

Note1: Boiler feed water hardness standard

China National boiler water standard: the hardness is less than 0.03mmol/L (millimoles/liter), and the softened water is qualified if it reaches this standard.

Note2: Boiler water quality standard required, parameter sheet as following: