Abstract: The importance of water treatment before using it in boilers is extremely necessary to guarantee the quality of industrial product and its validity for human consumption. This study deals with this very subject on one of the textile industrial company in Al- Buhayrah governorate, Egypt, namely TETCO Company. Water was characterized before feeding it in to boiler and was found to be turbidity, hardness, T.D.S, alkalinity, organic matters, silica and pH are 0.72, 164, 396,146, 3.2, 2.5, 7.5 respectfully. The results indicated the inconsistency of the water with the needed standard ones. This was reflected on the quality of cotton Lycra collected after dying process specially its color homogenity (leveling and direction) when the treatment of water to be used in boiler was modified using carbon filter, sand filter, softener and R.O units, the results was greatly improved. The treated water was found to have Appearance, hardness, T.D.S, alkalinity, organic matters, silica and pH are, clear, zero, 20, 22, zero, 1.5 and 9 respectfully, these results were in accordance with both BS and ES standards and were reflected on the quality of the product very positively.